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Synthesis of MnO2/N-doped ultramicroporous carbon nanospheres for high-performance supercapacitor electrodes 认领 引用 被引量：5
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作者 Wen-Jing Lu Shi-Ze Huang +6 位作者 Ling Miao Ming-Xian Liu Da-Zhang Zhu Liang-Chun Li Hui Duan Zi-Jie Xu Li-Hua Gan 《Chinese Chemical Letters》 SCIE CAS CSCD 2017年第6期1324-1329,共6页
We demonstrate a simple and highly efficient strategy to synthesize MnO2itrogen-doped ultramicroporous carbon nanospheres（MnO2/N-UCNs） for supercapacitor application.MnO2/N-UCNs were fabricated via a template-free p... We demonstrate a simple and highly efficient strategy to synthesize MnO2itrogen-doped ultramicroporous carbon nanospheres（MnO2/N-UCNs） for supercapacitor application.MnO2/N-UCNs were fabricated via a template-free polymerization of resorcinol/formaldehyde on the surface of phloroglucinolerephthalaldehyde colloids in the presence of hexamethylenetetramine,followed by carbonization and then a redox reaction between carbons and KMnO4.As-prepared MnO2/N-UCNs exhibits regular ultramicropores,high surface area,nitrogen heteroatom,and high content of MnO2.A typical MnO2/N-UCNs with 57 wt.%MnO2 doping content（denoted as MnO2（57%）/N-UCNs） makes the most use of the synergistic effect between carbons and metal oxides.MnO2（57%）/N-UCNs as a supercapacitor electrode exhibits excellent electrochemical performance such as a high specific capacitance（401 F/g at 1.0 A/g） and excellent charge/discharge stability（86.3%of the initial capacitance after 10,000 cycles at 2.0 A/g） in 1.0 mol/L Na2SO4 electrolyte.The well-designed and high-performance MnO2/N-UCNs highlight the great potential for advanced supercapacitor applications. 展开更多
关键词 Ultramicroporous carbon nanosphere Nitrogen-doping MnO2 Electrode Supercapacitor
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Oxygen Evolution Efficiency and Chlorine Evolution Efficiency for Electrocatalytic Properties of MnO_2-based Electrodes in Seawater 认领 引用 被引量：1
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作者 YAN Zhenwei SONG Lijun +1 位作者 TANG Mingqi FENG Zaiqiang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第1期69-74,共6页
To improve both oxygen evolution efficiency and stability at high temperatures, Mn, Mn+Mo, Mn+Mo+V, and Mn+Fe+V oxide electrodes were prepared on a Ti substrate, with an intermediate layer of IrO_2, by an anodic depos... To improve both oxygen evolution efficiency and stability at high temperatures, Mn, Mn+Mo, Mn+Mo+V, and Mn+Fe+V oxide electrodes were prepared on a Ti substrate, with an intermediate layer of IrO_2, by an anodic deposition method. The crystal structure, surface morphology, pore size distribution, specific surface area, and voltammetric charge were then characterized for each electrode. The results demonstrated that for Mn-O electrodes, the preferential orientation of the(100) crystal plane and the mesopore structure played negative roles in the oxygen evolution reaction. On the basis of the electrocatalytic properties of MnO2-based electrodes in seawater, the outer surface voltammetric charge at a scan rate of 500 mV·s-1 was shown to effectively indicate whether oxygen evolution reactions were preferred over chlorine evolution reactions. The Mn-O electrode exhibited oxygen evolution efficiency of only 47.27%, whereas the Mn+Mo, Mn+Mo+V and Mn+Fe+V oxide electrodes displayed oxygen evolution efficiency of nearly 100%. This means that adding Mo, V, and Fe elements to the electrode can improve its crystal structure and morphology as well as further enhancing its oxygen evolution efficiency. 展开更多
关键词 electrodeposition MnO2-based electrodes oxygen evolution reaction seawater electrolysis
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A bird nest-like manganese dioxide and its application as electrode in supercapacitors 认领 引用 被引量：2
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作者 Fen Ran Huili Fan +5 位作者 Lingren Wang Lei Zhao Yongtao Tan Xuanxuan Zhang Lingbin Kong Long Kang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第6期928-934,共7页
A novel bird nest-like nanostructured MnO2(BNNS-MnO2) was prepared by a facile and cost-effective strategy. Their structures and morphologies were characterized by field emission scanning electron microscopy, transmis... A novel bird nest-like nanostructured MnO2(BNNS-MnO2) was prepared by a facile and cost-effective strategy. Their structures and morphologies were characterized by field emission scanning electron microscopy, transmission electron microscopy and powder X-ray diffraction. Capacitive behaviors were investigated by cyclic voltammetry and galvanostatic charge-discharge. The obtained nano-MnO2 possesses a well designed loose-assembled hierarchical nanoarchitecture with an appropriate crystallinity which gives rise to excellent performances as an electrode material for supercapacitors. A maximum specific capacitance of 917 F/g has been obtained at a current density of 5 mA/cm2 in 6 mol/L KOH aqueous solution, and a specific capacitance of 210 F/g has been maintained for 500 cycles. As the low cost of MnSO4 and KCr2O7 and the low reaction temperature, the present method avoids the requirements for complicated operations, time/energy-consuming and expensive reagents, and perhaps is ready for the industrialization of nano-MnO2 production. 展开更多
关键词 energy storage nanostructured MnO2 supercapacitors electrochemical performance electrode material
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MnO2纳米棒—石墨烯复合物修饰乙炔黑电极灵敏检测饮料中的喹啉黄 认领 引用 被引量：2
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作者 邓培红 王淳之 +3 位作者 唐清 曾珺 朱青青 舒晶 《衡阳师范学院学报》 2019年第6期46-51,共6页
在乙炔黑电极(ABPE)表面用滴涂法修饰了二氧化锰纳米棒(MnO 2 NRs)—氧化石墨烯(GO)复合物,用控制电位法对氧化石墨烯进行电化学还原得到石墨烯(GR)。用扫描电子显微镜(SEM)和X射线衍射(XRD)对复合材料进行了表征,并通过循环伏安法和二... 在乙炔黑电极(ABPE)表面用滴涂法修饰了二氧化锰纳米棒(MnO 2 NRs)—氧化石墨烯(GO)复合物,用控制电位法对氧化石墨烯进行电化学还原得到石墨烯(GR)。用扫描电子显微镜(SEM)和X射线衍射(XRD)对复合材料进行了表征,并通过循环伏安法和二阶导数线性扫描伏安法研究了喹啉黄(QY)在MnO 2 NRs-GR/ABPE上的电化学响应。结果表明,与裸ABPE相比,MnO 2 NRs-GR/ABPE对QY具有良好的电催化活性,在该修饰电极上可观察到QY灵敏的氧化峰。对QY检测的实验参数进行了优化,在最佳实验条件下,QY在MnO 2 NRs-GR/ABPE上的氧化峰电流与其浓度在2.0×10-7~8.0×10-6 mol/L和8.0×10-6~8.0×10-5 mol/L范围内有良好的线性关系,检测限为8.0×10-8 mol/L。将该方法应用于饮料中QY的检测,结果满意。 展开更多
关键词 二氧化锰纳米棒 石墨烯 喹啉黄 修饰电极 测定
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MnO2Nanosheets Anchored on a Biomass-Derived Porous Carbon for High-Performance Supercapacitors 认领 引用
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作者 Xiangyu Ding Guojiang Wu 《Open Journal of Energy Efficiency》 2021年第3期73-80,共8页
Considering the great potential of composite electrode with carbon and transition metal oxides as a future ideal form of electrode for future energy storing system, many efforts have been devoted into such aspect of r... Considering the great potential of composite electrode with carbon and transition metal oxides as a future ideal form of electrode for future energy storing system, many efforts have been devoted into such aspect of research. Sweet potato-derived carbon framework with nanosheet form of MnO2 anchored on it was carried out through the low-temperature solution grown technique, which is simple, low-cost, and applicable for large-scale commercial production. Such form of composite electrode can facilitate the inner transportation of electrons and ions, and offer high specific capacitance (309 F/g at 0.5 A/g) with comparable discharging rate capability (94 F/g at 20 A/g), which reasonably can be regarded as a superior form of composite electrode. 展开更多
关键词 Composite Electrode MnO2 Sweet Potato Biomass Supercapacitors
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锰系氧化物在非锂离子电池正极材料中的应用研究 认领 引用
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作者 许定胜 李庆波 《蓄电池》 CAS 2025年第3期132-150,共19页
综述了锰系氧化物在非锂离子电池正极材料中的发展和应用,重点介绍了它们的晶体结构、电化学性能提升策略和储能电化学反应机理。此外,还讨论了许多锰系氧化物所遇到的关键问题,包括Jahn–Teller畸变、Mn溶解、结晶水等的影响。最后,对... 综述了锰系氧化物在非锂离子电池正极材料中的发展和应用,重点介绍了它们的晶体结构、电化学性能提升策略和储能电化学反应机理。此外,还讨论了许多锰系氧化物所遇到的关键问题,包括Jahn–Teller畸变、Mn溶解、结晶水等的影响。最后,对锰系氧化物的未来发展提出了挑战和展望。 展开更多
关键词 锰系氧化物 非锂离子电池 正极材料 可充电电池 Jahn–Teller畸变 Mn溶解 结晶水 MnO Mn3O4 Mn2O3 MnO2
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Capacitance and voltage matching between MnO2 nanoflake cathode and Fe2O3 nanoparticle anode for high-performance asymmetric micro-supercapacitors 认领 引用 被引量：10
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作者 Zehua Liu Xiaocong Tian +6 位作者 Xu Xu Liang He Mengyu Yan Chunhua Han Yan Li Wei Yang Liqiang Mai 《Nano Research》 SCIE EI CSCD 2017年第7期2471-2481,共11页
Planar micro-supercapacitors show great potential as the energy storage unit in miniaturized electronic devices. Asymmetric structures have been widely inves- tigated in micro-supercapacitors, and carbon-based materia... Planar micro-supercapacitors show great potential as the energy storage unit in miniaturized electronic devices. Asymmetric structures have been widely inves- tigated in micro-supercapacitors, and carbon-based materials are commonly applied in the electrodes. To integrate different metal oxides in both electrodes in micro-supercapacitors, the critical challenge is the pairing of different faradic metal oxides. Herein, we propose a strategy of matching the voltage and capadtance of two faradic materials that are fully integrated into one high-performance asymmetric micro-supercapacitor by a facile and controllable fabrication process. The fabricated micro-supercapacitors employ MnO2 as the positive active material and Fe203 as the negative active material, respectively. The planar asymmetric micro-supercapacitors possess a high capacitance of 60 F-cm-3, a high energy density of 12 mW.h.cm-3, and a broad operation voltage range up to 1.2 V. 展开更多
关键词 MnO2 nanoflake Fe2O3 nanoparticle asymmetric electrodes micro-supercapacitors
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二氧化锰/石墨烯/棉织物复合电极的制备及其电化学性能 认领 引用 被引量：3
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作者 李育洲 张雨凡 +2 位作者 周青青 陈国强 邢铁玲 《纺织学报》 EI CAS CSCD 北大核心 2020年第1期96-101,共6页
为研究并增强柔性织物电极的电化学性能,采用改进Hummers法制备得到高浓度氧化石墨烯水溶胶,并通过干涂层法将氧化石墨烯涂覆于棉织物表面,经化学-微波两步还原法还原氧化石墨烯,制备了石墨烯/棉织物。进一步采用电化学沉积法将二氧化... 为研究并增强柔性织物电极的电化学性能,采用改进Hummers法制备得到高浓度氧化石墨烯水溶胶,并通过干涂层法将氧化石墨烯涂覆于棉织物表面,经化学-微波两步还原法还原氧化石墨烯,制备了石墨烯/棉织物。进一步采用电化学沉积法将二氧化锰沉积在石墨烯/棉织物上,得到二氧化锰/石墨烯/棉织物复合电极材料。借助扫描电子显微镜、X射线衍射仪和红外光谱仪对复合电极材料的形貌和结构进行表征。研究结果表明:复合电极材料在0.25 A/g的电流密度下比电容达到490 F/g,1000次电容放电后电容保持在95.5%,能量密度达到17.01 W·h/kg。 展开更多
关键词 石墨烯 二氧化锰 棉织物 复合材料 电极 电化学性能
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碱锰电池生产中的质量分析和控制 认领 引用 被引量：2
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作者 吴雪平 《电池》 EI CAS 北大核心 2001年第4期180-183,共4页
介绍了碱锰电池生产中各工序的要点 ,包括对正极制造、负极制造、注锌膏、密封等 7道工序的质量控制要点和测试方法进行了分析和说明。在管理上必须严加控制 ,才能确保电池质量。
关键词 碱锰电池 正极 负极 锌膏 密封
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无镉锌电极的应用 认领 引用 被引量：1
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作者 毛瑞 《电池》 EI CAS 北大核心 2001年第5期236-237,共2页
通过对无镉锌电极及有镉锌电极对比验证 ,分析了锌电极中取消镉 ,从而实现电池无镉化的可行性。结果表明 ,两种锌电极分别制成的电池在贮存期内的耐腐蚀性能及电性能十分接近。镁的引入相对于一些金属缓蚀剂 ,更能达到降低成本的目的。
关键词 锌锰电池 无镉锌电极 镁 耐腐蚀性
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Influence of Synthesis Condition on In-situ Grown of MnO_2 on Activated Carbon Fiber Cloth 认领 引用
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作者 YAN Qinglong ZHANG Shilei +2 位作者 CHU Ruixia WANG Jieqiang LIU Huakun 《Journal of the Chinese Ceramic Society》 2015年第2期74-81,共8页
The in-situ grown of nanostructured MnO2 on activated carbon fiber cloth(ACFC) was obtained with a potassium permanganate solution in the absence of oxidant, reductant or binder addition via a typical microwave hydrot... The in-situ grown of nanostructured MnO2 on activated carbon fiber cloth(ACFC) was obtained with a potassium permanganate solution in the absence of oxidant, reductant or binder addition via a typical microwave hydrothermal synthesis procedure. The carbon fiber cloth serves as a sacrificial reductant and a substrate material to guarantee MnO2 deposition. The results show that the synthesis condition has a great influence on the morphology and structure of MnO2 grown on ACFC.Highly ordered grass-blade-like δ-MnO2/ACFC hybrid nanocomposites were synthesized at 70℃ for 60 min. The grass-blade-like δ-MnO2 are 500 nm in length and 10 nm in depth, and they are well-proportioned grown on the surface of ACFC. The combination of ACFC and MnO2 is rather tight, thus improving the toughness of MnO2. This free-standing, flexible hybrid structure material could be used as a favorable candidate of flexible supercapacitor electrode materials. 展开更多
关键词 flexible electrode MnO2 in situ grow microwave hydrothermal synthesis
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