Temperature effects on cycling stability of Li plating/stripping on Ta-doped Li7La3Zr2O12

Fumihiro Yonemoto, Atsuki Nishimura, Munekazu Motoyama, Nobuo Tsuchimine, Susumu Kobayashi, Yasutoshi Iriyama

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)

Abstract

This paper reports on the cycling stability of Li plating/stripping on Li6.6La3Zr1.6Ta0.4O12[LLZ(Ta0.4)] with high sintering density at 25, 60, and 100 °C. Plated/stripped Li thicknesses are sequentially increased to 200 nm, 1.0 μm, and 2.0 μm after every ten cycles. The overpotential gradually increases with cycling Li plating/stripping processes, and the cells eventually short-circuit at 25 and 60 °C. However, the cycling stability of Li plating/stripping significantly improves at 100 °C, and the short-circuiting is prevented perfectly. Moreover, the cycling stability of Li plating/stripping at 25 °C is dramatically improved by pre-cycling the cell at 100 °C. Only heating a cell with Li metal at 100 °C for the same duration does not improve the cycling stability of the cell. It is hence considered that forced migrations of Li atoms and ions across entire Li/LLZ(Ta0.4) interfaces at 100 °C change the properties of the interfacial regions even for the following plating/stripping cycles at 25 °C.

Original languageEnglish
Pages (from-to)207-215
Number of pages9
JournalJournal of Power Sources
Volume343
DOIs
Publication statusPublished - 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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