Polymer composite electrolytes having core?shell silica fillers with anion-trapping boron moiety in the shell layer for all-solid-state lithium-ion batteries

Title
Polymer composite electrolytes having core?shell silica fillers with anion-trapping boron moiety in the shell layer for all-solid-state lithium-ion batteries
Authors
심지민김동균김희중이진홍이종찬
Issue Date
2015-04
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 7, NO 14-7701
Abstract
Core-shell silica particles with ion-conducting poly(ethylene glycol) and anion-trapping boron moiety in the shell layer were prepared to be used as fillers for polymer composite electrolytes based on organic/inorganic hybrid branched copolymer as polymer matrix for all-solid-state lithium-ion battery applications. The core-shell silica particles were found to improve mechanical strength and thermal stability of the polymer matrix and poly(ethylene glycol) and boron moiety in the shell layer increase compatibility between filler and polymer matrix. Furthermore, boron moiety in the shell layer increases both ionic conductivity and lithium transference number of the polymer matrix because lithium salt can be more easily dissociated by the anion-trapping boron. Interfacial compatibility with lithium metal anode is also improved because well-dispersed silica particles serve as protective layer against interfacial side reactions. As a result, all-solid-state battery performance was found to be enhanced when the copolymer having core-shell silica particles with the boron moiety was used as solid polymer electrolyte.
URI
http://pubs.kist.re.kr/handle/201004/71137
ISSN
1944-8244
Appears in Collections:
KIST Publication > Article
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