Regulating Solvation Structure in Nonflammable Amide-Based Electrolytes for Long-Cycling and Safe Lithium Metal Batteries

Qian Kui Zhang, Xue Qiang Zhang, Li Peng Hou, Shu Yu Sun, Ying Xin Zhan, Jia Lin Liang, Fang Shu Zhang, Xu Ning Feng, Bo Quan Li, Jia Qi Huang

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

The cycling stability of lithium metal batteries is steadily improving. The safety issues, which mainly result from the employment of flammable solvents, should be strongly considered for practical Li metal batteries. Nonflammable solvents can mitigate fire hazards; however, their employment irreversibly deteriorates the cycling stability of working batteries owing to intrinsic high reactivity against Li metal. Herein, regulating solvation structure in a dimethylacetamide (DMAC)-based electrolyte is proposed to achieve compatibility between cycling stability and nonflammability of electrolytes. DMAC, a nonflammable solvent, is employed to construct a nonflammable localized high-concentration electrolyte (LHCE). In the DMAC-based LHCE, there are abundant aggregate clusters resulting in the formation of anion-derived solid electrolyte interphase to circumvent parasitic reactions between DMAC solvents and Li metal and to improve the uniformity of Li deposition, which ensures the compatibility between cycling stability under practical conditions and nonflammability of electrolytes. This work opens an emerging avenue to construct long-cycling and safe Li metal batteries by manipulating solvation structure in nonflammable electrolytes.
Original languageEnglish (US)
JournalAdvanced Energy Materials
Volume12
Issue number24
DOIs
StatePublished - Jun 1 2022
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-21

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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