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A biomass based free radical scavenger binder endowing a compatible cathode interface for 5 V lithium-ion batteries

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Abstract

5 V lithium ion batteries (LIBs) are promising candidates for high energy density batteries. However, conventional carbonate-based liquid electrolyte is vulnerable to oxidative decomposition caused by free radical attack, which leads to poor cycling performance of the 5 V LIBs. Herein, we present a novel strategy based on the free radical scavenging effect to suppress the electrolyte decomposition of 5 V class batteries composed of LiNi0.5Mn1.5O4 (LNMO) cathodes and carbonate-based electrolyte. Our strategy is to scavenge the free radicals during the charging process at the cathode interface by adopting a renewable biomass lignin binder with numerous phenol groups, which can significantly suppress the free radical chain reaction and subsequently generate a compatible multi-dimensional interphase between the electrode and electrolyte. The lignin based electrode exhibited a capacity retention of 94.1% after 1000 cycles, which is significantly higher than that of its PVDF counterpart (46.2%). This work represents a milestone contribution to the strategy for resolving the interfacial issue of high voltage cathode materials, initiating a big step in boosting 5 V batteries.

Graphical abstract: A biomass based free radical scavenger binder endowing a compatible cathode interface for 5 V lithium-ion batteries

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Publication details

The article was received on 02 Sep 2018, accepted on 09 Nov 2018 and first published on 17 Nov 2018


Article type: Paper
DOI: 10.1039/C8EE02555J
Citation: Energy Environ. Sci., 2019, Advance Article
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    A biomass based free radical scavenger binder endowing a compatible cathode interface for 5 V lithium-ion batteries

    Y. Ma, K. Chen, J. Ma, G. Xu, S. Dong, B. Chen, J. Li, Z. Chen, X. Zhou and G. Cui, Energy Environ. Sci., 2019, Advance Article , DOI: 10.1039/C8EE02555J

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