Enhanced Lithium-Ion Conductivity of Polymer Electrolytes by Selective Introduction of Hydrogen into the Anion

Heng Zhang*, Uxue Oteo, Haijin Zhu, Xabier Judez, Maria Martinez-Ibañez, Itziar Aldalur, Eduardo Sanchez-Diez, Chunmei Li, Javier Carrasco, Maria Forsyth, Michel Armand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

The anion chemistry of lithium salts plays a pivotal role in dictating the physicochemical and electrochemical performance of solid polymer electrolytes (SPEs), thus affecting the cyclability of all-solid-state lithium metal batteries (ASSLMBs). The bis(trifluoromethanesulfonyl)imide anion (TFSI) has long been studied as the most promising candidate for SPEs; however, the Li-ion conductivities of the TFSI-based SPEs still remain low (Li-ion transference number: ca. 0.2). In this work, we report new hydrogen-containing anions, conceived based on theoretical considerations, as an electrolyte salt for SPEs. SPEs comprising hydrogen-containing anions achieve higher Li-ion conductivities than TFSI-based ones, and those anions are electrochemically stable for various kinds of ASSLMBs (Li–LiFePO4, Li–S, and Li–O2 batteries). This opens up a new avenue for designing safe and high-performance ASSLMBs in the future.

Original languageEnglish
Pages (from-to)7829-7834
Number of pages6
JournalAngewandte Chemie - International Edition
Volume58
Issue number23
DOIs
StatePublished - 3 Jun 2019
Externally publishedYes

Keywords

  • Li-ion conductivity
  • batteries
  • electrolytes
  • hydrogen-containing anions
  • sulfonimide

Fingerprint

Dive into the research topics of 'Enhanced Lithium-Ion Conductivity of Polymer Electrolytes by Selective Introduction of Hydrogen into the Anion'. Together they form a unique fingerprint.

Cite this