An aprotic lithium/polyiodide semi-liquid battery with an ionic shield

Y. X. Ren, M. Liu, T. S. Zhao, L. Zeng, M. C. Wu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

In this paper, we report a high-energy-density lithium/polyiodide (Li/PI) semi-liquid battery with soluble polyiodide in ether-based solvents as the catholyte. The challenge of shuttle effect is addressed by adopting a hybrid membrane coated with negatively charged sulfonate-ended perfluoroalkyl polymer, which allows for inhibition of polyiodide shuttles due to the electrostatic repulsion. The assembled Li/PI battery demonstrates a superior volumetric energy density (170.5 Wh L−1), a stable cycling performance (>100 cycles, averaged decay < 0.16% at 0.2 C), a high energy efficiency (>84%, 100 cycles at 2 C), and a high coulombic efficiency (>95%, 100 cycles at 2 C). These high performances achieved suggest that the aprotic Li/polyiodide battery with a compact architecture has the potential for various energy storage applications.

Original languageEnglish
Pages (from-to)9-16
Number of pages8
JournalJournal of Power Sources
Volume342
DOIs
Publication statusPublished - 28 Feb 2017
Externally publishedYes

Keywords

  • Electrostatic repulsion
  • Ion selective membrane
  • Lithium/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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