Enhancing Li+ Transport in NMC811||Graphite Lithium-Ion Batteries at Low Temperatures by Using Low-Polarity-Solvent Electrolytes

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Bo Nan
  • Long Chen
  • Nuwanthi D. Rodrigo
  • Oleg Borodin
  • Nan Piao
  • Jiale Xia
  • Travis Pollard
  • Singyuk Hou
  • Jiaxun Zhang
  • Xiao Ji
  • Xiyue Zhang
  • Lin Ma
  • Xinzi He
  • Sufu Liu
  • Hongli Wan
  • Enyuan Hu
  • Weiran Zhang
  • Kang Xu
  • Xiao-Qing Yang
  • Brett Lucht
  • Chunsheng Wang

Detail(s)

Original languageEnglish
Article numbere202205967
Journal / PublicationAngewandte Chemie - International Edition
Volume61
Issue number35
Online published5 Jul 2022
Publication statusPublished - 26 Aug 2022
Externally publishedYes

Abstract

LiNixCoyMnzO2 (x+y+z=1)||graphite lithium-ion battery (LIB) chemistry promises practical applications. However, its low-temperature (≤ −20 °C) performance is poor because the increased resistance encountered by Li+ transport in and across the bulk electrolytes and the electrolyte/electrode interphases induces capacity loss and battery failures. Though tremendous efforts have been made, there is still no effective way to reduce the charge transfer resistance (Rct) which dominates low-temperature LIBs performance. Herein, we propose a strategy of using low-polarity-solvent electrolytes which have weak interactions between the solvents and the Li+ to reduce Rct, achieving facile Li+ transport at sub-zero temperatures. The exemplary electrolyte enables LiNi0.8Mn0.1Co0.1O2||graphite cells to deliver a capacity of ≈113 mAh g−1 (98 % full-cell capacity) at 25 °C and to remain 82 % of their room-temperature capacity at −20 °C without lithium plating at 1/3C. They also retain 84 % of their capacity at −30 °C and 78 % of their capacity at −40 °C and show stable cycling at 50 °C. © 2022 Wiley-VCH GmbH.

Research Area(s)

  • Inorganic-Rich EEIs, Li-Plating Free, Low-Temperature Electrolyte, NMC811||Graphite, Weak Ion-Dipole Interactions

Citation Format(s)

Enhancing Li+ Transport in NMC811||Graphite Lithium-Ion Batteries at Low Temperatures by Using Low-Polarity-Solvent Electrolytes. / Nan, Bo; Chen, Long; Rodrigo, Nuwanthi D. et al.
In: Angewandte Chemie - International Edition, Vol. 61, No. 35, e202205967, 26.08.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review