Lithium modified silica as electrolyte additive for lithium secondary batteries

Title
Lithium modified silica as electrolyte additive for lithium secondary batteries
Authors
조원일Mohammed LatifatuMengyang HuSang Jun KimChris Yeajoon BonChiwon KangJang Myoun Ko
Keywords
lithium sulfonyl silica; electrolyte additive; lithium ion battery; ionic conductivity; oxidation potential
Issue Date
2018-06
Publisher
Solid state ionics
Citation
VOL 319-12
Abstract
Lithium sulfonyl silica (LSS) was synthesized by replacing the surface -H group in fumed silica with (CH2)(3)SO3Li and adopted as electrolyte additive for lithium ion battery. 3 wt% of the synthesized particles in 1 M LiPF6 (EC/DMC = 1:1) showed improved ionic conductivity and better potential stability over the pristine electrolyte. The discharge capacity of the LiCoO2/graphite is particularly enhanced with the addition of LSS at higher C-rates due to the enhanced ionic conductivity at room temperature. The LiCoO2/graphite cells using 1.0 M LiPF6/EC/DMC (1:1) and 1.0 M LiTFSI/EC/DMC (1:1) with LSS also showed superior performance for the self-discharge test carried out at 45 degrees C for 200 days. These positive impacts of LSS on LiCoO2/graphite cells warrant its use in lithium ion batteries.
URI
http://pubs.kist.re.kr/handle/201004/67770
ISSN
0167-2738
Appears in Collections:
KIST Publication > Article
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