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

Zonghai Chen, Yang Ren, Andrew N. Jansen, Chi-kai Lin, Wei Weng and Khalil Amine ()
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Zonghai Chen: Argonne National Laboratory
Yang Ren: Advanced Photon Source, Argonne National Laboratory
Andrew N. Jansen: Argonne National Laboratory
Chi-kai Lin: Argonne National Laboratory
Wei Weng: Argonne National Laboratory
Khalil Amine: Argonne National Laboratory

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: 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 Li2B12F12-xHx electrolyte, using lithium difluoro(oxalato)borate as an electrolyte additive, that has superior performance to the conventional LiPF6-based electrolyte with regard to cycle life and safety, including tolerance to both overcharge and thermal abuse. Cells tested with the Li2B12F9H3-based electrolyte maintained about 70% initial capacity when cycled at 55 °C 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 Li1-x[Ni1/3Mn1/3Co1/3]0.9O2 cathode was delayed by about 20 °C when using the Li2B12F12-based electrolyte.

Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms2518

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DOI: 10.1038/ncomms2518

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