Lithium Argyrodite as Solid Electrolyte and Cathode Precursor for Solid-State Batteries with Long Cycle Life

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 H. Richter, Jürgen Janek, Ce Wen Nan

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

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 Li6PS5Cl0.5Br0.5 (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.

本文言語英語
論文番号2101370
ジャーナルAdvanced Energy Materials
11
31
DOI
出版ステータス出版済み - 8 19 2021

All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • 材料科学(全般)

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