A stabilized high-energy Li-polyiodide semi-liquid battery with a dually-protected Li anode

Y. X. Ren, T. S. Zhao, H. R. Jiang, M. C. Wu, M. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

Li-polyiodide batteries are attractive because of their high energy density and excellent rate performance. Nevertheless, the polyiodide shuttle effect and Li dendrite growth over cycling result in fast degradation of the Li anode and a short cycle life. Here we report a facile yet efficient design of high-energy membrane-free Li-polyiodide battery, in which the Li anode is shielded by a pre-deposited indium (In) layer and a graphene paper layer. The proof-of-concept semi-liquid battery with such a dual-protection strategy demonstrates a remarkably enhanced cycling stability for the reasons: (i) the In layer is capable of mitigating the Li dendrite growth and resisting the polyiodide shuttle attack; and (ii) the graphene paper physically suppresses the anode surface evolution and enables the formation of a separated passivation layer. Consequently, the battery can operate with a concentrated catholyte of 6 M Iand achieves a volumetric energy density as high as 165.3 Wh L−1(1.5 C) for 100 cycles. The high performances achieved suggest the aprotic Li-polyiodide battery with a compact and robust architecture shows the potential for various energy storage applications.

Original languageEnglish
Pages (from-to)136-144
Number of pages9
JournalJournal of Power Sources
Volume347
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • Dendrite
  • Electrodeposition
  • Li-polyiodide battery
  • Shuttle effect

ASJC Scopus subject areas

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

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