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Breaking boundaries in O3-type NaNi1/3Fe1/3Mn1/3O2cathode materials for sodium-ion batteries:An industrially scalable reheating strategy for superior electrochemical performance 认领 引用 被引量：2
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作者 Manman Chen Cai Zhao +10 位作者 Yan Li Hui Wang Kaihang Wang Shengchen Yang Yue Gao Wenjuan Zhang Chun Chen Tao Zhang Lei Wen Kehua Dai Jing Mao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第3期107-119,共13页
To address the challenges of air stability and slurry processability in layered transition metal oxide O3-type NaNi1/3Fe1/3Mn1/3O2(NFM)for sodium-ion batteries(SIBs),we have designed an innovative 500℃... To address the challenges of air stability and slurry processability in layered transition metal oxide O3-type NaNi1/3Fe1/3Mn1/3O2(NFM)for sodium-ion batteries(SIBs),we have designed an innovative 500℃reheating strategy.This method improves the surface properties of NFM without the need for additional coating layers,making it more efficient and suitable for large-scale applications.Pristine NFM(NFM-P)was first synthesized through a high-temperature solid-state method and then modified using this reheating approach(NFM-HT).This strategy significantly enhances air stability and electrochemical performance,yielding an initial discharge specific capacity of 151.46 mAh/g at 0.1C,with a remarkable capacity retention of 95.04%after 100 cycles at 0.5C.Additionally,a 1.7 Ah NFM‖HC(hard carbon)pouch cell demonstrates excellent long-term cycling stability(94.64%retention after 500 cycles at 1C),superior rate capability(86.48%retention at 9C),and strong low-temperature performance(77%retention at-25℃,continuing power supply at-40℃).Notably,even when overcharged to 8.29 V,the pouch cell remained safe without combustion or explosion.This reheating strategy,which eliminates the need for a coating layer,offers a simpler,more scalable solution for industrial production while maintaining outstanding electrochemical performance.These results pave the way for broader commercial adoption of NFM materials. 展开更多
关键词 Sodium-ion batteries O3-type layered oxide cathode Reheating Al2O3coating Pouch full cells
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锂离子电池热管理技术研究进展 认领 引用 被引量：30
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作者 李嘉鑫 李鹏钊 +7 位作者 王苗 陈纯 闫良玉 高月 杨生宸 陈满满 赵财 毛景 《过程工程学报》 CAS CSCD 北大核心 2023年第8期1102-1117,共16页
高效的电池热管理技术对于锂离子电池的安全运行、长循环使用寿命以及整体成本的降低至关重要,且对推动锂离子电池的大规模应用具有重要意义。本综述详细讨论了几种主流的电池热管理技术,即空气冷却、液体冷却、新型的相变材料冷却和热... 高效的电池热管理技术对于锂离子电池的安全运行、长循环使用寿命以及整体成本的降低至关重要,且对推动锂离子电池的大规模应用具有重要意义。本综述详细讨论了几种主流的电池热管理技术,即空气冷却、液体冷却、新型的相变材料冷却和热电冷却技术,并对电池产热模型进行了简要阐述,最后对电池冷却技术的发展方向进行了展望。空气冷却技术结构简单,但难以保证电池组内电芯温度的一致性,不适用于大型锂离子电池组的冷却,更多应用于小型飞行电动设备和低端车型中。冷却板液冷技术的冷却效果较好,但存在冷却液泄漏风险且需要进一步提高均温性。浸没式液冷技术的冷却和均温效果显著,但价格昂贵,未来可能会更多地应用到冷却要求较高的储能电站中,而对于大多数锂离子电动汽车而言,成本更低的冷却板液冷技术是更好的选择。相变材料冷却和热电冷却技术无移动部件,在电子设备和小型动力设备领域实现了初步商业化应用,但冷却效率较低,还需要进一步优化。值得注意的是,根据用户的需求来选择合适的冷却技术是十分关键的,虽然目前没有完美的冷却方案,但可以通过复合使用多种冷却技术的方式来满足更多应用场景的热管理需求。要点:(1)空气冷却技术的冷却效果和均温性较差。(2)液冷技术的冷却效果更显著,其中冷却板液冷技术的成本较低,浸没式液冷的均温性更好。(3)新型相变材料冷却和热电冷却技术冷却效率低,需要与其他冷却技术组合使用。 展开更多
关键词 锂离子电池 电池热管理技术 空气冷却 液体冷却 相变材料冷却 热电冷却
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Constructing Lithium-Free Anode/Separator Interface via 3D Carbon Fabric Scaffold for Ultrasafe Lithium Metal Batteries 认领 引用 被引量：3
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作者 Dongdong Li Shengchen Yang +1 位作者 Zijian Zheng Wen-Yong Lai 《Research》 SCIE EI CSCD 2024年第3期359-368,共10页
Metallic lithium represents a promising anode candidate to be utilized in future high-energy lithium batteries.However,the undesirable dendrite growth and fragile solid-electrolyte interphase(SEI)pose critical challen... Metallic lithium represents a promising anode candidate to be utilized in future high-energy lithium batteries.However,the undesirable dendrite growth and fragile solid-electrolyte interphase(SEI)pose critical challenge for pursuing further practical application.In contrast to traditional approaches of using inert/lithiophilicity coating,here,we demonstrate a reverse strategy of introducing a highly conductive and lithophobic carbon fabric(CF)scaffold on lithium foil to guide a favorable nucleation site of lithium far away from the anode/separator interface.The CF scaffold with high conductivity can couple with inner electric field for achieving a uniform distribution of the lithium-ion flux,while the lithophobic feature offers the condition to guide the preferred deposition of lithium onto the underlying lithium foil,which greatly reduces the risk of dendrite-induced short circuits.Moreover,the SEI immersed in the CF scaffold is well supported by CF fibers and therefore exhibits extremely high stability during charge–discharge cycles.As a result,the lithium/CF anodes show>2,000-h stable cycling at 0.5 mA cm−2.Lithium metal batteries equipped with our lithium/CF anode deliver a high capacity retention of~99.99%per cycle,i.e.,retain~97.3%capacity after 200 cycles.The unique interface-regulation strategy is versatile for various conductive scaffolds(e.g.,ultrathin and ultralight conductive fabrics),exhibiting high superiority for highly safe lithium metal batteries. 展开更多
关键词 lithium equipped versatile
Revealing the correlation between structural evolution and long-term cyclability of the LiNi0.5Co0.2Mn0.3O2/artificial graphite pouch cells at various rates 认领 引用 被引量：1
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作者 Xu-Feng Zang Shengchen Yang +3 位作者 Ying Zou Yingying Zhang Tao Huang Hui-Ling Xia 《Particuology》 SCIE EI CAS CSCD 2023年第10期162-173,共12页
In recent years,researches on improving high-voltage performance of lithium-ion batteries incorporating LiNi0.5Co0.2Mn0.3O2(NCM523)and artificial graphite(AG)have been widely reported.However,limited atten... In recent years,researches on improving high-voltage performance of lithium-ion batteries incorporating LiNi0.5Co0.2Mn0.3O2(NCM523)and artificial graphite(AG)have been widely reported.However,limited attentions have been paid to understand the effects and influence mechanisms of charge and discharge rates and charge limit currents on cyclability of NCM523/AG cells.Herein,a∼1.9 Ah NCM523/AG pouch cell is employed,whose electrochemical and structural evolutions after 800 cycles at various rates are comprehensively investigated.We find that cycling performances are strongly influenced by charge rate,followed by limit current and discharge rate.The cell charged at a high rate and cell charged until reaching a low limit current both exhibit low capacity retentions compared to the cell discharged at a high rate.Possible failure reasons are analyzed by advanced characterizations.Results reveal that NCM523 cathodes of the cells deteriorated early experience severe transition metal dissolution,lattice distortion,and partial phase transformation.Meanwhile,the deposited transition metals on AG anodes catalyze the electrolyte consumption,lithium plating and active area loss.Finally,these side reactions notably increase cell impedance and electrochemical polarization.Undoubtedly,these findings clearly outline the challenges and optimization direction for high-rate NCM523/AG cells. 展开更多
关键词 Lithium-ion batteries Artificial graphite LiNi0.5Co0.2Mn0.3O2 Cycle life Charge-dischargerate Failure mechanism
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