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New Class of Nonaqueous Electrolytes for Long-Life and Safe Lithium-Ion Batteries

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, Khalil Amine

Nat Commun. 2013;4:1513.

PMID: 23443541

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 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 Li(1-x)[Ni(1/3)Mn(1/3)Co(1/3)](0.9)O(2) cathode was delayed by about 20 °C when using the Li(2)B(12)F(12)-based electrolyte.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP409071165	Lithium difluoro(oxalato)borate		409071-16-5	Price

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