ETRI-Knowledge Sharing Plaform

ENGLISH

성과물

논문 검색
구분 SCI
연도 ~ 키워드

상세정보

학술지 Enhanced Separator Properties by Thermal Curing of Poly(Ethylene Glycol)Diacrylate-Based Gel Polymer Electrolytes for Lithium-Ion Batteries
Cited 15 time in scopus Download 0 time Share share facebook twitter linkedin kakaostory
저자
김광만, Beta Zenia Poliquit, 이영기, 원정하, 고장면, 조원일
발행일
201402
출처
Electrochimica Acta, v.120, pp.159-166
ISSN
0013-4686
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.electacta.2013.12.077
협약과제
13SB1100, 통합형 플랙서블 필름 전지 시스템 개발, 김광만
초록
Porous polyethylene (PE) or nonwoven poly(vinylidene fluoride) (PVdF) separator-supported gel polymer electrolytes are realized by thermal polymerization of a precursor solution consisting of poly(ethylene glycol)diacrylate (PEGDA) and an electrolyte solution (1 M LiPF6 in an equal-volume mixture of ethylene carbonate and dimethyl carbonate). The polymerization conditions are optimized to include a PEGDA content of 3 wt.% in the precursor solution and subsequent heat treatment at 80 C for 10 min. Even though the gelled PEGDA electrolyte has a lower ionic conductivity than the electrolyte solution, a LixCoO2/graphite full-cell that has a gel electrolyte with optimized PEGDA content on the PVdF separator achieves a battery performance superior to the one with PE. The best battery performances achieved are a high discharge capacity (116 mAh g-1), a good high-rate capability (95 mAh g-1 at 5.0 C-rate), and a high capacity retention ratio (90%) after the 100th cycle. This enhancement is due to the incorporation of a polar electrolyte solution that is entrapped by the polar PEGDA matrix within the nonwoven PVdF separator, which is a more suitable host that is able to well absorb and preserve the gel electrolyte. © 2013 Elsevier Ltd.
키워드
gel polymer electrolytes, lithium-ion batteries, Poly(ethylene glycol)diacrylate, thermal polymerization
KSP 제안 키워드
Dimethyl carbonate(DMC), Electrolyte solution, Full cell, Gel polymer electrolyte, High capacity retention, High discharge capacity, Ion batteries, PVdF separator, Poly(ethylene glycol) diacrylate, Polyethylene (pe), Polymerization conditions