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A ternary phased SnO_2-Fe_2O_3/SWCNTs nanocomposite as a high performance anode material for lithium ion batteries 认领 引用 被引量：5
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作者 Wangliang Wu Yi Zhao +2 位作者 Jiaxin Li Chuxin Wu Lunhui Guan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第3期376-382,共7页
A new SnO2-Fe2O3/SWCNTs（single-walled carbon nanotubes） ternary nanocomposite was first synthesized by a facile hydrothermal approach.SnO2 and Fe2O3 nanoparticles（NPs） were homogeneously located on the surface of ... A new SnO2-Fe2O3/SWCNTs（single-walled carbon nanotubes） ternary nanocomposite was first synthesized by a facile hydrothermal approach.SnO2 and Fe2O3 nanoparticles（NPs） were homogeneously located on the surface of SWCNTs,as confirmed by X-ray diffraction（XRD）,transmission electron microscope（TEM） and energy dispersive X-ray spectroscopy（EDX）.Due to the synergistic effect of different components,the as synthesized SnO2-Fe2O3/SWCNTs composite as an anode material for lithium-ion batteries exhibited excellent electrochemical performance with a high capacity of 692 mAh·g-1 which could be maintained after 50 cycles at 200 mA·g-1.Even at a high rate of2000 mA·g-1,the capacity was still remained at 656 mAh·g-1. 展开更多
关键词 SWCNTs SnO2 Fe2O3 lithium ion batteries anode materials
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Facile one-step synthesis of Cu_2O@Cu sub-microspheres composites as anode materials for lithium ion batteries 认领 引用 被引量：4
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作者 Huijie Zhou Hongbin Zhao +3 位作者 Xuan Zhang Hongwei Cheng Xionggang Lu Qian Xu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第7期1085-1090,共6页
Cu2O@Cu sub-microspheres composites with a narrow particle size distribution from 300 to 500 nm was successfully fabricated by one-step synthesis through the direct thermal decomposition of copper nitrate （Cu（NO3）2... Cu2O@Cu sub-microspheres composites with a narrow particle size distribution from 300 to 500 nm was successfully fabricated by one-step synthesis through the direct thermal decomposition of copper nitrate （Cu（NO3）2） in octadecylamine （ODA） solvent. As anode materials for lithium ion batteries, the Cu2O@Cu composites obviously possess high specific capacity, excellent cyclic stability and rate capability. The coulombic efficiency is about 84% in the 1 st cycle and increases significantly up to 97.8% during successive cycles at various current densities. Even under a high current density of 500 mA g^-l, the discharge capacity of Cu2O@Cu composites remains up to 200 mAh g^-1. The excellent electrochemical properties are ascribed to the synergistic effect between high electronic conductivity and volume-buffering capacity of metallic copper composited with Cu2O.2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science ＆ Technology. 展开更多
关键词 Cu2O@Cu composites Anode materials Octadecylamine One-step synthesis
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Facile synthesized Cu-SnO2 anode materials with three-dimensional metal cluster conducting architecture for high performance lithium-ion batteries 认领 引用 被引量：3
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作者 Zhijia Zhang Yuxuan Hou +9 位作者 Shaofei Zhang Guoliang Zhang Ming Li Huanming Lu Yong Li Xuerong Zheng Zhijun Qiao Zhenyang Yu Qin Huang Jianli Kang 《Chinese Chemical Letters》 SCIE CAS CSCD 2018年第11期1656-1660,共5页
Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/ discharge, however... Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/ discharge, however, restrict the commercialization of metal oxide anode material. In this work, we design a novel Cu-SnO2 composite derived from Cu6Sn5 alloy with three dimensional （3D） metal cluster conducting architecture. The novel Cu structure penetrates in the composite particles inducing high conductivity and space-confined SnO2, which restrict the pulverization of SnO2 during lithiation/ delithiation process. The optimized Cu-SnO2 composite anode delivers an initial discharge capacity of 933.7 mA h/g and retains a capacity of 536.1 mA h/g after 200 cycles, at 25℃ and a rate of 100 mA/g. Even at the high rate of 300 mA/g, the anode still exhibits a capacity of more than 29% of that tested at 50 mA/g. Combining with the phase and morphology analysis, the novel Cu-SnO2 composite not only has good electrical conductivity, but also possesses high theoretical capacity （995 mAh/g）, which may pave a new way for the design and construction of next-generation metal oxide anode materials with high power and cycling stability. 展开更多
关键词 Cu-SnO2 composite Cu6Sn5 alloy Ball milling Anode materials Lithium-ion batteries
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Electrochemical properties of SnO_2 nanorods as anode materials in lithium-ion battery 认领 引用 被引量：2
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作者 施松林 刘永刚 +1 位作者 张敬源 王太宏 《Chinese Physics B》 SCIE EI CAS 2009年第10期4564-4570,共7页
Well-dispersed SnO2 nanorods with diameter of 4-15 nm and length of 100-200 nm are synthesised through a hydrothermal route and their potential as anode materials in lithium-ion batteries is investigated. The observed... Well-dispersed SnO2 nanorods with diameter of 4-15 nm and length of 100-200 nm are synthesised through a hydrothermal route and their potential as anode materials in lithium-ion batteries is investigated. The observed initial discharge capacity is as high as 1778 mA.h/g, much higher than the theoretical value of the bulk SnO2 （1494 mA.h/g）. During the following 15 cycles, the reversible capacity decreases from 929 to 576 mA-h/g with a fading rate of 3.5% per cycle. The fading mechanism is discussed. Serious capacity fading can be avoided by reducing the cycling voltages from 0.05-3.0 to 0.4-1.2 V. At the end, SnO2 nanorods with much smaller size are synthesized and their performance as anode materials is studied. The size effect on the electrochemical properties is briefly discussed. 展开更多
关键词 SnO2 nanorods lithium-ion battery anode materials fading mechanism
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Hydrothermal synthesis of spindle-like Li_2FeSiO_4-C composite as cathode materials for lithium-ion batteries 认领 引用 被引量：5
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作者 Haiyan Gao Zhe Hu +3 位作者 Kai Zhang Fangyi Cheng Zhanliang Tao Jun Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第3期274-281,共8页
In this paper,we report on the preparation of Li2FeSiO4,sintered Li2FeSiO4,and Li2FeSiO4-C composite with spindle-like morphologies and their application as cathode materials of lithium-ion batteries.Spindle-like Li2F... In this paper,we report on the preparation of Li2FeSiO4,sintered Li2FeSiO4,and Li2FeSiO4-C composite with spindle-like morphologies and their application as cathode materials of lithium-ion batteries.Spindle-like Li2FeSi04 was synthesized by a facile hydrothermal method with（NH4）2Fe（SO4）2 as the iron source.The spindle-like Li2FeSiO4 was sintered at 600 ℃ for 6 h in Ar atmosphere.Li2FeSiO4-C composite was obtained by the hydrothermal treatment of spindle-like Li2FeSiO4 in glucose solution at 190 ℃ for 3 h.Electrochemical measurements show that after carbon coating,the electrode performances such as discharge capacity and high-rate capability are greatly enhanced.In particular.Li2FeSiO4-C with carbon content of 7.21 wt%delivers the discharge capacities of 160.9 mAh·g-1 at room temperature and 213 mAh·g-1 at45℃（0.1 C）,revealing the potential application in lithium-ion batteries. 展开更多
关键词 Li2FeSiO4-C composite spindle like hydrothermal synthesis cathode material lithium-ion battery
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3D hierarchical microspheres constructed by ultrathin MoS2-C nanosheets as high-performance anode material for sodium-ion batteries 认领 引用 被引量：4
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作者 Wenlong Zhang Haihui Zhou +6 位作者 Zhongyuan Huang Songlin Li Chuqing Wang Huanxin Li Zhanheng Yan Teng Hou Yafei Kuang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第10期307-315,共9页
MoS2/C composites are considered to have great application potential in sodium-ion batteries(SIBs).It is a challenging and meaningful subject that developing high-performance anode materials via combining MoS2 and car... MoS2/C composites are considered to have great application potential in sodium-ion batteries(SIBs).It is a challenging and meaningful subject that developing high-performance anode materials via combining MoS2 and carbon effectively to give free rein to their advantages in sodium ion storage.In this work,a novel MoS2-C material was designed by using cellulose nanocrystals(CNCs)as low-cost and green carbon source.3 D hierarchical microspheres(200-250 nm)constructed by ultrathin MoS2-C nanosheets were synthesized by synchronizing the pre-carbonization of CNCs with the formation of MoS2 in hydrothermal reaction and subsequent pyrolysis process.It is found that the ultrathin MoS2-C nanosheets were composed of CNCs-derived short-range ordered carbon and few-layered MoS2.Benefiting from the unique structure and robust combination of MoS2 and CNCs-derived carbon,the ultrathin MoS2-C nanosheets composite was proved to have excellent cycling stability and superior rate performance in sodium-ion half-cell test and have high first reversible specific capacity of 397.9 m Ah/g in full-cell test.This work provides a significant and effective pathway to prepare MoS2-C materials with excellent electrochemical performance for the application in large-scale energy storage systems. 展开更多
关键词 Cellulose nanocrystals MoS2-C nanosheets Hierarchical microspheres Anode material Sodium-ion batteries
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In situ anchoring in carbon matrix of Bi2O2CO3 as a high-performance anode material for Li-ion batteries 认领 引用 被引量：1
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作者 Pu-Qiang He Jun Guo +1 位作者 Hui Huang Zhong-Cheng Guo 《Rare Metals》 SCIE EI CAS CSCD 2024年第8期3634-3646,共13页
Bismuth-based anode materials have been regarded as promising Li-ion batteries due to their high theoretical capacity.However,their low conductivity and associated volume expansion inhabited their commercialization.In... Bismuth-based anode materials have been regarded as promising Li-ion batteries due to their high theoretical capacity.However,their low conductivity and associated volume expansion inhabited their commercialization.In this work,Bi2O2CO3@C composites were successfully synthesized by in situ anchoring of flower-like Bi2O2CO3 nanosheets on a carbon-based substrate via hydrothermal.The unique composited structure of Bi_2O2-CO3@C leads to a stable specific capacity of 547 mAh·g-1after 100 cycles at a current density of 0.1 A·g-1.Notably,it demonstrates excellent rate capability with a specific capacity of 210 mAh·g-1at 5 A·g-1.After 550 cycles at a current density of 0.5 A·g-1,a high reversible capacity of nearly 400 mAh·g-1was observed.Additionally,in situ X-ray diffraction measurements clearly demonstrate the conversion between Bi and Li3Bi during alloying/dealloying,confirming the good electrochemical reversibility of the materials for Li storage.The reaction kinetics of Bi2O2CO3@C were further investigated using galvanostatic intermittent titration technique.Furthermore,Bi_2O2-CO3@C exhibited excellent long-term stability,maintaining its high reversible capacity for over 200 cycles at a current density of 0.5 A·g-1in a full cell configuration using Li1.20Mn0.54Ni0.13Co0.13O2 as the cathode material.This result further underscores its promising potential for lithium-ion batteries.This work may provide inspiration for the design of alloy-type negative electrode materials for high-performance rechargeable batteries. 展开更多
关键词 Bi2O2CO3 Composite materials Anode materials Full batteries
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Microstructure and properties of Ag/SnO2 functional material manufactured by selective laser melting 认领 引用 被引量：7
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作者 Yuanjie Zhang Bo Song +1 位作者 Xiao Zhao Yusheng Shi 《Nano Materials Science》 EI CAS 2019年第3期208-214,共7页
Ag/SnO2,as a promising and environment-friendly electrical contact material,is widely applied in low-voltage apparatus.But the properties of Ag/SnO2 composites is difficult to improve due to the poor distribution phas... Ag/SnO2,as a promising and environment-friendly electrical contact material,is widely applied in low-voltage apparatus.But the properties of Ag/SnO2 composites is difficult to improve due to the poor distribution phases and difficult component design.In this work,the Ag/SnO2 composites are prepared by selective laser melting.To get better performance,Ag/SnO2 composites with different energy density were studied.The microstructure was observed by field emission scanning electron microscope.In addition,reinforced SnO2 phase was characterized by X-ray diffraction and transmission electron microscope.The results indicated that the microstructure,relative density and hardness of are influenced by energy density,while Ag/SnO2 composites with homogeneous microstructure,high relative density,higher hardness and lower electrical resistivity can be obtained by proper energy density(E?68 J/mm^3). 展开更多
关键词 Selective laser melting Ag/SnO2 Composites Electrical contact material
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SiO_x-based(0 认领 引用 被引量：4
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作者 Tong Wang Xiaotian Guo +2 位作者 Huiyu Duan Changyun Chen Huan Pang 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第3期654-666,共13页
Silicon(Si) materials as anode materials for applications in lithium-ion batteries(LIBs) have received increasing attention.Among the Si materials,the electrochemical properties of SiOx-based(0<x≤2)composites are ... Silicon(Si) materials as anode materials for applications in lithium-ion batteries(LIBs) have received increasing attention.Among the Si materials,the electrochemical properties of SiOx-based(0<x≤2)composites are the most prominent.However,due to the cycling stability of SiOx being far from practical,there are some problems,such as Iow initial coulombic efficiency(ICE),obvious volume expansion and poor conductivity.Researchers in various countries have optimized the electrochemical properties of SiOx-based composites by means of pore formation,surface modification,and the choice of constituents.In this review,SiOx-based composites are classified into three categories based on the valency of Si(SiO2 composites,SiO composites and SiOx(0<x<2) composites).The synthesis,morphologies and electrochemical properties of the SiOx-based composites that are applied in LIB are discussed.Finally,the prope rties of several common SiOx-based composites are briefly compared and the challenges faced by SiOx-based composites are highlight. 展开更多
关键词 Lithium-ion battery Anode material SiO2 composites SiO composites SiOx-based(0composite
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Design of CoSn2/Sn@C core-shell structure for stable lithium-ion batteries 认领 引用
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作者 Dan ZHANG Lu-zhen GUO +5 位作者 Da-xu ZHANG Wen-qiang FANG Yuan-hang GAO Zuo-su QIN Ning ZHANG Gen CHEN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第5期1659-1671,共13页
To mitigate the issues of severe volume expansion(>259%)and electrode pulverization in Sn-based anodes(theoretical specific capacity:993 mA·h/g)for next-generation lithium-ion batteries(LIBs),we designed a CoS... To mitigate the issues of severe volume expansion(>259%)and electrode pulverization in Sn-based anodes(theoretical specific capacity:993 mA·h/g)for next-generation lithium-ion batteries(LIBs),we designed a CoSn2/Sn@C core−shell structure to accommodate the volume change and stabilize the cycling performance of LIBs.The Co3O4/SnO2 nanocubes were firstly prepared from CoSn(OH)6 precursor via a sintering and oxidation process in an air atmosphere.Subsequently,glucose was coated on Co3O4/SnO2 nanocubes,and then the composites were sintered under a reduction atmosphere to form CoSn2/Sn@C nanocubes with a core−shell structure.The CoSn2/Sn@C nanocubes exhibited shortened ion transport paths and excellent reaction kinetics due to their well-designed structures and controlled compositions.The electrochemical test results show that an excellent specific capacity of 672.2 mA·h/g after 500 cycles at a current density of 1 A/g was maintained for CoSn2/Sn@C electrode.The core−shell structure design of the elaborated CoSn2/Sn@C nanocubes holds significant implications for the development of high-performance anode materials for LIBs. 展开更多
关键词 lithium-ion batteries anode materials core−shell structure nanocube CoSn2/Sn@C composite electrochemical properties
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Influence of nano-CeO_2 on coating structure and properties of electrodeposited Al/α-PbO_2/β-PbO_2 认领 引用 被引量：9
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作者 陈阵 余强 +2 位作者 廖登辉 郭忠诚 武剑 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第5期1382-1389,共8页
Al/α-PbO2/β-PbO2 composite electrodes doped with rare earth oxide （CeO2） were prepared by anodic oxidation method investigate the influence of nano-CeO2 dopants on the properties of Al/α-PbO2/β-PbO2-CeO2 electro... Al/α-PbO2/β-PbO2 composite electrodes doped with rare earth oxide （CeO2） were prepared by anodic oxidation method investigate the influence of nano-CeO2 dopants on the properties of Al/α-PbO2/β-PbO2-CeO2 electrodes and the impact of α-PbO2 as the intermediate layer. The results show that using α-PbO2 as the intermediate layer will benefit the crystallization of β-PbO2 and β-PbO2 is more suitable as the surface layer than α-PbO2. CeO2 dopants change the crystallite size and crystal structure, enhance the catalytic activity, and even change the deposition mechanism of PbO2. The doping of CeO2 in the PbO2 electrodes can enhance the electro-catalytic activity, which is helpful for oxygen evolution, and therefore reduce the cell voltage. 展开更多
关键词 rare earth CeO2 composite electrode material α-PbO2 β-PbO2 cell voltage inert anode
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SnO/Nd2O3复合材料的制备及可见光催化性能 认领 引用 被引量：1
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作者 孙长红 梁宝岩 《印染》 CAS 北大核心 2023年第3期1-4,共4页
通过超声反应制备了SnO/Nd2O3复合材料,评估了复合材料在可见光下降解甲基橙的光降解性能。结果表明,Nd2O3能很好地与SnO复合。SnO/Nd2O3复合材料在可见光区的吸收比SnO样品强。其中,SnO/2%Nd2O3复合材料表现... 通过超声反应制备了SnO/Nd2O3复合材料,评估了复合材料在可见光下降解甲基橙的光降解性能。结果表明,Nd2O3能很好地与SnO复合。SnO/Nd2O3复合材料在可见光区的吸收比SnO样品强。其中,SnO/2%Nd2O3复合材料表现出最高的光催化性能,在60 min内可以降解99.6%的甲基橙。 展开更多
关键词 光催化降解 可见光 SnO Nd2O3 甲基橙 复合材料
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Synthesis and electrochemical properties of Zn_2SnO_4 and Zn_2Sn0.8Ti0.2O_4/C 认领 引用
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作者 袁万颂 田彦文 +1 位作者 刘丽娟 李建中 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第4期858-864,共7页
Compound Zn2Sn0.8Ti0.2O4 was synthesized by a hydrothermal method in which SnCl4-5H2O,TiCl4,ZnCl2 and N2H4-H2O were used as reactants.The composite Zn2Sn0.8Ti0.2O4/C was then prepared through a carbothermic reduction ... Compound Zn2Sn0.8Ti0.2O4 was synthesized by a hydrothermal method in which SnCl4-5H2O,TiCl4,ZnCl2 and N2H4-H2O were used as reactants.The composite Zn2Sn0.8Ti0.2O4/C was then prepared through a carbothermic reduction process using the as-prepared Zn2Sn0.8Ti0.2O4 and glucose as reactants.The structure,morphology and electrochemical properties of the as-prepared products were investigated by XRD,XPS,TEM and electrochemical measurements.In addition,electrochemical Li insertion/extraction in composite Zn2Sn0.8Ti0.2O4/C were examined by ex situ XRD and SEM.The first discharge capacity of Zn2SnO4 is about 1670.8 mA-h/g,with a capacity retain of 342.7 mA-h/g in the 40th cycle at a constant current density of 100 mA/g in the voltage range of 0.05-3.0 V.Comparing with the Zn2SnO4,some improved electrochemical properties are obtained for Zn2Sn0.8Ti0.2O4,Zn2SnO4/C and Zn2Sn0.8Ti0.2O4/C.The composite Zn2Sn0.8Ti0.2O4/C shows the best electrochemical properties,and its first discharge capacity is about 1530.0 mA-h/g,with a capacity retain of 479.1 mA-h/g the 100th cycle. 展开更多
关键词 Zn2SnO4 Zn2Sn0.8Ti0.2O4/C titanium substitution lithium ion batteries anode materials
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SnO2@Ti3C2Tx负极材料的制备及其应用 认领 引用
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作者 李玲芳 原志朋 范长岭 《材料研究学报》 EI CAS CSCD 北大核心 2022年第8期602-608,共7页
通过超声辅助和低温热处理在二维Ti3C2Tx纳米片层间原位生长SnO2纳米颗粒,制备出纳米结构的SnO2@Ti3C2Tx复合材料。使用X射线衍射、X射线光电子能谱和高分辨透射电子显微镜等手段对其表征,研究了这种材料的结... 通过超声辅助和低温热处理在二维Ti3C2Tx纳米片层间原位生长SnO2纳米颗粒,制备出纳米结构的SnO2@Ti3C2Tx复合材料。使用X射线衍射、X射线光电子能谱和高分辨透射电子显微镜等手段对其表征,研究了这种材料的结构和性能。结果表明,SnO2纳米粒子密集分布在Ti3C2Tx片层表面与片层之间,Ti3C2Tx纳米薄片突出的限制效应和良好的类石墨层状结构抑制了SnO2纳米粒子的体积膨胀和团聚,加速了锂离子和电子的跃迁。同时,嵌入在片层之间的SnO2纳米粒子防止纳米片层在锂插入/脱出过程中重新堆积,使Ti3C2Tx基体的纵向结构稳定性提高。SnO2@Ti3C2Tx复合材料两组分之间的协同效应,使其具有良好的倍率性能与长循环性能。 展开更多
关键词 复合材料 SnO2/Ti3C2Tx 超声辅助 负极材料
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Synthesis and electrochemical performance of a novel nano sized Sn_2SbNi composite 认领 引用
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作者 郭洪 林雪飞 陈益山 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS 2010年第S1期253-256,共4页
Chemical reduction method was employed to prepare nano-sized Sn2SbNi alloy composites used as anode material for rechargeable lithium ion batteries.This strategy was adopted to combine the virtues of both active/inact... Chemical reduction method was employed to prepare nano-sized Sn2SbNi alloy composites used as anode material for rechargeable lithium ion batteries.This strategy was adopted to combine the virtues of both active/inactive and active/active alloys to fabricate a Sn2SbNi alloy powder with two active components and one inactive component.The two active components can realize the high capacity feature of electrode and can make the volume change of electrode take place in a stepwise manner due to the different lithiation potentials of two active components,leading to a stable cycling performance.Sn2SbNi alloy provides a reversible specific capacity over 640 mA·h/g with an excellent cyclic ability.The Sn-Sb-Ni alloy composite material shows to be a good candidate anode material for the lithium ion batteries. 展开更多
关键词 Li-ion batteries Sn2SbNi composite anode materials chemical reduction method
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CuO-SnO2花状结构复合材料的制备及气敏特性研究 认领 引用 被引量：3
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作者 王伟远 时卓 《传感器与微系统》 CSCD 2020年第3期18-21,共4页
采用简单的一步水热合成路线制备了CuO-SnO 2花状结构复合材料,通过SEM,XRD,XPS对相应的微观结构进行了分析表征。结果显示:所制备的花状结构由形状、大小相似的纳米片组装而成,直径为2~5μm,CuO的含量对SnO 2花状结构没有影响。将制得... 采用简单的一步水热合成路线制备了CuO-SnO 2花状结构复合材料,通过SEM,XRD,XPS对相应的微观结构进行了分析表征。结果显示:所制备的花状结构由形状、大小相似的纳米片组装而成,直径为2~5μm,CuO的含量对SnO 2花状结构没有影响。将制得的花状结构复合材料构筑旁热式气敏元件,并采用静态配气法测试了气敏元件对三甲胺气体的敏感特性。结果表明:相比于纯SnO 2元件,CuO-SnO 2元件对三甲胺气体表现出灵敏度高、检测下限低、选择性好、响应和恢复迅速等优点,其气敏性能的提高归因于SnO 2与CuO接触面p-n异质结的构筑及CuO的催化特性。 展开更多
关键词 花状结构 CuO-SnO 2复合材料 三甲胺 气敏特性
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二维TiO2基材料的制备及其储钠性能研究进展 认领 引用 被引量：1
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作者 马骏杰 李伟 +3 位作者 蓝晓琪 刘峥 周烽海 陈远志 《电源技术》 CAS 北大核心 2025年第2期255-266,共12页
综述了近年来层状二维二氧化钛(TiO2)及其复合材料在钠离子电池(SIBs)负极材料中的应用。阐述了层状二维TiO2因为其结构的稳定性、更高的比表面积及优异的电化学性能在SIBs负极材料应用上的优势,阐述了层状二维TiO2的制备方法... 综述了近年来层状二维二氧化钛(TiO2)及其复合材料在钠离子电池(SIBs)负极材料中的应用。阐述了层状二维TiO2因为其结构的稳定性、更高的比表面积及优异的电化学性能在SIBs负极材料应用上的优势,阐述了层状二维TiO2的制备方法,如化学剥离法、模板支撑法等。介绍了层状二维TiO2的掺杂及复合的方法,以及通过调控TiO2(001)晶面的暴露、设计氧空穴,增加电化学活性的方法。介绍了层状二维TiO2复合材料在SIBs负极材料中的实际应用,进一步证明二维结构以及与其他材料复合可以提高TiO2的电化学活性和电导率,从而获得优异的电化学性能。 展开更多
关键词 二维TiO2 TiO2复合材料 制备方法 储钠性能 负极材料
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超临界CO2流体辅助合成Si-Fe-Fe3O4-C复合材料及储锂性能 认领 引用
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作者 卢铚航 马俊凯 +5 位作者 杨刚锋 夏阳 甘永平 张俊 张文魁 黄辉 《复合材料学报》 EI CAS CSCD 北大核心 2023年第1期171-179,共9页
硅碳负极是未来锂离子电池材料发展的重点方向之一,本文针对传统球磨法制备硅碳负极复合不均匀、界面融合差等问题,提出了一种超临界二氧化碳(scCO2)流体介质球磨合成Si-Fe-Fe3O4-C复合材料的新方法。研究发现,纳米硅和中间相... 硅碳负极是未来锂离子电池材料发展的重点方向之一,本文针对传统球磨法制备硅碳负极复合不均匀、界面融合差等问题,提出了一种超临界二氧化碳(scCO2)流体介质球磨合成Si-Fe-Fe3O4-C复合材料的新方法。研究发现,纳米硅和中间相碳微球(MCMB)在scCO2介质球磨混合过程中,CO2和Fe反应先得到均匀分散的Si-FeCO3-C前驱体,然后FeCO3原位高温固相分解得到Si-Fe-Fe3O4-C复合材料。同时,在scCO2流体渗透下,MCMB剥离成石墨片,并与纳米硅和Fe-Fe3O4实现较好的界面融合,Fe-Fe3O4的引入显著提升了硅碳负极的储锂容量、循环稳定性和倍率性能,Si-Fe-Fe3O4-C复合材料在0.2 A·g-1下100次循环后可逆容量保持在1065 mA·h·g-1。本方法利用超临界流体渗透性好、扩散能力强等特点,合成工艺简便,容易工业化实施,具有商业化开发潜力。 展开更多
关键词 硅碳负极 超临界流体 CO2 Si-Fe-Fe3O4-C复合材料 储锂性能
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多孔竹炭负载SnO2的制备及其电化学性能研究 认领 引用
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作者 吴洪 陈前林 李翠芹 《硅酸盐通报》 CAS 北大核心 2021年第11期3740-3749,共10页
多孔竹炭为无定形碳,具有丰富的孔结构,孔径分布在1~6 nm之间,且具有较大的孔体积(1.21 cm3/g)。本文以多孔竹炭为载体,采用溶胶-凝胶法制得B2O3-SnO2/C复合材料。SEM和TEM结果显示SnO2和B2O3均匀分布在多孔竹炭... 多孔竹炭为无定形碳,具有丰富的孔结构,孔径分布在1~6 nm之间,且具有较大的孔体积(1.21 cm3/g)。本文以多孔竹炭为载体,采用溶胶-凝胶法制得B2O3-SnO2/C复合材料。SEM和TEM结果显示SnO2和B2O3均匀分布在多孔竹炭表面。多孔竹炭和B2O3有效缓冲SnO2可逆反应的体积变化,提高SnO2的循环稳定性。将B2O3-SnO2/C复合材料作为负极组装成锂离子半电池,进行电化学性能测试,在1 C(1 C=372 mA/g)倍率下充放电循环200次结束后仍然保留649.9 mAh/g的放电比容量,放电比容量保留率为58.6%。B2O3-SnO2/C复合材料充放电过程受扩散和电容两种行为控制,电容控制的贡献率随着扫描速率的增大而增大。 展开更多
关键词 B2O3-SnO2/C复合材料 循环稳定性 锂离子电池 负极材料 多孔竹炭 溶胶-凝胶法
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SnO2-SnS2/graphene heterojunction composite promotes highperformance sodium ion storage 认领 引用
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作者 Yuanyuan Ma Ke Ping +6 位作者 Peng Sun Kaibin Lin Junjie Guo Lu Yue Wenhui Zhang Xiangwei Wu Zhaoyin Wen 《Journal of Materiomics》 SCIE CSCD 2025年第4期325-339,共15页
The design of electrode material nanostructures including reducing material sizes and designing appropriate heterostructures,has great potential in improving charge storage dynamics and enhancing practical performance... The design of electrode material nanostructures including reducing material sizes and designing appropriate heterostructures,has great potential in improving charge storage dynamics and enhancing practical performance.In this study,we present the innovative synthesis of SnO2-SnS2/graphene heterojunction composite materials via a controlled vulcanization reaction process.The unique structure endows the composite with high electronic conductivity,rapid ion diffusion rates,elevated electrochemical activity,excellent structural stability,and abundant reaction sites,making it a highly efficient anode material for sodium-ion batteries(SIBs).Half-cell tests demonstrate that the SnO2-SnS2-G composite achieves a first Coulombic efficiency of 77.3%at a high current density of 5 A/g,showing remarkable cycling stability.Remarkably,the composite retains a reversible capacity of 330 mA,h/g after 1000 cycles,with a capacity retention rate of 77.5%.Moreover,we elucidate the specific sodium storage mechanisms of the heterojunction composite electrode via in-situ and ex-situ characterization methods.Furthermore,a full battery utilizing Na0.53MnO2as the cathode and SnO2-SnS2-G composite as the anode exhibits outstanding rate performance and long-term cycling stability.This method of heterostructure design and fabrication,coupled with the exceptional performance metrics,suggests that the SnO2-SnS2-G heterostructure is a promising candidate for advanced anode materials in SIBs applications. 展开更多
关键词 SnO2-SnS2/Graphene composite Heterojunction Electrochemical performance Anode material SIBs
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