阴极
材料科学
剥脱关节
电化学
锂(药物)
电池(电)
氧化物
锂钴氧化物
化学工程
氧化钴
锂离子电池
纳米技术
石墨烯
电极
冶金
化学
物理化学
功率(物理)
内分泌学
工程类
物理
医学
量子力学
作者
Owen C. Compton,Ali Abouimrane,Zhi An,Marc J. Palmeri,L. Catherine Brinson,Khalil Amine,SonBinh T. Nguyen
出处
期刊:Small
[Wiley]
日期:2012-02-08
卷期号:8 (7): 1110-1116
被引量:37
标识
DOI:10.1002/smll.201101131
摘要
Abstract An exfoliation–reassembly–activation (ERA) approach to lithium‐ion battery cathode fabrication is introduced, demonstrating that inactive HCoO 2 powder can be converted into a reversible Li 1‐x H x CoO 2 thin‐film cathode. This strategy circumvents the inherent difficulties often associated with the powder processing of the layered solids typically employed as cathode materials. The delamination of HCoO 2 via a combination of chemical and mechanical exfoliation generates a highly processable aqueous dispersion of [CoO 2 ] − nanosheets that is critical to the ERA approach. Following vacuum‐assisted self‐assembly to yield a thin‐film cathode and ion exchange to activate this material, the generated cathodes exhibit excellent cyclability and discharge capacities approaching that of low‐temperature‐prepared LiCoO 2 (~83 mAh g −1 ), with this good electrochemical performance attributable to the high degree of order in the reassembled cathode.
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