Non-Flammable Electrolyte Enables High-Voltage and Wide-Temperature Lithium-Ion Batteries with Fast Charging

Yeguo Zou, Zheng Ma, Gang Liu, Qian Li, Dongming Yin, Xuejian Shi, Zhen Cao, Zhengnan Tian, Hun Kim, Yingjun Guo, Chunsheng Sun, Luigi Cavallo, Limin Wang*, Husam N. Alshareef*, Yang Kook Sun*, Jun Ming*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Electrolyte design has become ever more important to enhance the performance of lithium-ion batteries (LIBs). However, the flammability issue and high reactivity of the conventional electrolytes remain a major problem, especially when the LIBs are operated at high voltage and extreme temperatures. Herein, we design a novel non-flammable fluorinated ester electrolyte that enables high cycling stability in wide-temperature variations (e.g., −50 °C–60 °C) and superior power capability (fast charge rates up to 5.0 C) for the graphite||LiNi0.8Co0.1Mn0.1O2 (NCM811) battery at high voltage (i.e., >4.3 V vs. Li/Li+). Moreover, this work sheds new light on the dynamic evolution and interaction among the Li+, solvent, and anion at the molecular level. By elucidating the fundamental relationship between the Li+ solvation structure and electrochemical performance, we can facilitate the development of high-safety and high-energy-density batteries operating in harsh conditions.

Original languageEnglish (US)
Article numbere202216189
JournalAngewandte Chemie - International Edition
Volume62
Issue number8
DOIs
StatePublished - Feb 13 2023

Keywords

  • Fast-Charging
  • Lithium-Ion Batteries
  • Nonflammable High-Voltage Electrolyte
  • Solvation Structure
  • Wide-Temperature

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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