New class of nonaqueous electrolytes for long-life and safe lithium-ion batteries

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

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Author(s)

  • Zonghai Chen
  • Andrew N. Jansen
  • Chi-Kai Lin
  • Wei Weng
  • Khalil Amine

Detail(s)

Original languageEnglish
Article number1513
Journal / PublicationNature Communications
Volume4
Publication statusPublished - 2013
Externally publishedYes

Abstract

Long-life and safe lithium-ion batteries have been long pursued to enable electrification of the transportation system and for grid applications. However, the poor safety characteristics of lithium-ion batteries have been the major bottleneck for the widespread deployment of this promising technology. Here, we report a novel nonaqueous Li 2 B 12 F 12-x H x electrolyte, using lithium difluoro(oxalato)borate as an electrolyte additive, that has superior performance to the conventional LiPF 6 -based electrolyte with regard to cycle life and safety, including tolerance to both overcharge and thermal abuse. Cells tested with the Li 2 B 12 F 9 H 3 -based electrolyte maintained about 70% initial capacity when cycled at 55C for 1,200 cycles, and the intrinsic overcharge protection mechanism was active up to 450 overcharge abuse cycles. Results from in situ high-energy X-ray diffraction showed that the thermal decomposition of the delithiated Li 1-x [Ni 1/3 Mn 1/3 Co 1/3 ] 0.9 O 2 cathode was delayed by about 20C when using the Li 2 B 12 F 12 -based electrolyte. © 2013 Macmillan Publishers Limited.

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Citation Format(s)

New class of nonaqueous electrolytes for long-life and safe lithium-ion batteries. / Chen, Zonghai; Ren, Yang; Jansen, Andrew N. et al.
In: Nature Communications, Vol. 4, 1513, 2013.

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