PVDF-HFP基凝胶电解质用于LiNi0.5Co0.2Mn0.3O2三元正极锂离子电池*

doi:10.11896/j.issn.1005-023X.2017.012.002

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Abstract Gel electrolyte for lithium ion battery was prepared via room-temperature in-situ polymerization using poly(vinylidenefluoride-co-hexafluoro-propylene) (PVDF-HFP) as polymer matrix, neopentylglycoldiacrylate (NPGDA) as crosslinking agent, 2,2′-azobis(2-methylpropionitrile) (AIBN) as initiator. The effects of the mass ratio of PVDF-HFP/NPGDA on the performances of gel electrolyte and lithium ion batteries were investigated. The results showed that the gel electrolyte with the PVDF-HFP/NPGDA mass ratio of 1∶1 had a high ionic conductivity of 8.45 mS·cm^-1, a lithium ion transport number of 0.78 and an electrochemical potential window of 4.5 V, as well as a good compatibility with lithium anode. The initial discharge specific capacity was 143 mAh·g^-1 at a current density of 30 mA·g^-1, and the retention capacity was up to 135.3 mAh· g^-1 after 50 cycles. The discharge speci-fic capacity of the battery was 100.2 mAh· g^-1 at a current density of 300 mA· g^-1.

Key words： PVDF-HFP gel electrolyte LiNi_0.5Co_0.2Mn_0.3O₂ lithium-ion battery electrochemical performance

Published: 08 May 2018

CLC number:

TM911.3

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	Articles by authors
	XUE Jingyuan
	HOU Bo
	MO Yan
	CAO Bokai
	CHEN Daming
	LI De
	CHEN Yong

Cite this article:

XUE Jingyuan,HOU Bo,MO Yan, et al. PVDF-HFP Based Gel Electrolyte for Lithium-ion Battery with LiNi_0.5Co_0.2Mn_0.3O₂ Cathode[J]. Materials Reports, 2017, 31(12): 6-10.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.012.002 OR http://www.mater-rep.com/EN/Y2017/V31/I12/6

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