材料科学
电解质
阴极
锂(药物)
氧化还原
化学工程
快离子导体
储能
分解
阳极
电化学
电极
纳米技术
冶金
物理化学
化学
内分泌学
有机化学
功率(物理)
量子力学
工程类
物理
医学
作者
Shuo Wang,Mingxue Tang,Qinghua Zhang,Baohua Li,Saneyuki Ohno,Felix Walther,Ruijun Pan,Xiaofu Xu,Chengzhou Xin,Wenbo Zhang,Liangliang Li,Yang Shen,Felix Richter,Jürgen Janek,Ce‐Wen Nan
标识
DOI:10.1002/aenm.202101370
摘要
Abstract All‐solid‐state batteries with conversion‐type cathodes promise to exceed the performance of lithium‐ion batteries due to their high theoretical specific energy and potential safety. However, the reported performance of solid‐state batteries is still unsatisfactory due to poor electronic and ionic conduction in the composite cathodes. Here, in situ formation of active material as well as highly effective ion‐ and electron‐conducting paths via electrochemical decomposition of Li 6 PS 5 Cl 0.5 Br 0.5 (LPSCB)/multiwalled carbon nanotube mixtures during cycling is reported. Effectively, the LPSCB electrolyte forms a multiphase conversion‐type cathode by partial decomposition during the first discharge. Comprehensive characterization, especially operando pressure monitoring, reveals a co‐redox process of two redox‐active elements during cycling. The monolithic LPSCB‐based cell shows stable cycling over 1000 cycles with a very high capacity retention of 94% at high current density (0.885 mA cm −2 , ≈ 0.7 C) at room temperature and a high areal capacity of 12.56 mAh cm −2 is achieved.
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