Local LiFramework Regulation of a Garnet-Type Solid-State Electrolyte

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

1 Scopus Citations
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Author(s)

  • Furong Sun
  • Yubo Yang
  • Shu Zhao
  • Yongtao Wang
  • Mingxue Tang
  • Qingzhen Huang
  • Heng Su
  • Boya Wang
  • Ning Zhao
  • Xiangxin Guo
  • Haijun Yu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)2835-2844
Journal / PublicationACS Energy Letters
Volume7
Issue number8
Online published3 Aug 2022
Publication statusPublished - 12 Aug 2022

Abstract

Garnet-type solid-state electrolytes Li7La3Zr2O12 (LLZO) for high-energy-density batteries have attracted extensive attention. However, stabilizing the high-conductive cubic phase and improving its ionic conductivity remain challenges of current research. Here, a Ca-W dual-substitution strategy has been designed, and the effect of doping on cubic phase formation and Li+ mobility has been investigated thoroughly. The results indicated that the partial substitution of Ca2+ at the La3+ site and W6+ at the Zr4+ site can effectively stabilize the cubic phase while reducing the endothermic enthalpy during the synthesis. Moreover, Ca-W dual substitution regulates the local Li+ framework by increasing Li+ occupancy at the 96h site, which can significantly lower the Li+ migration barrier and thus improve the ionic conductivity by two orders of magnitude. This work addresses the challenge of stabilizing a highly conductive cubic phase with low-energy consumption and represents a major breakthrough in understanding how to improve the ionic conductivity by regulating local structures.

Citation Format(s)

Local LiFramework Regulation of a Garnet-Type Solid-State Electrolyte. / Sun, Furong; Yang, Yubo; Zhao, Shu et al.

In: ACS Energy Letters, Vol. 7, No. 8, 12.08.2022, p. 2835-2844.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review