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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Cross Linkable Polymeric Binders for Si anodes in Li Batteries for high performance and practical applications

등록일
2015년 8월 27일 16시 50분 07초
접수번호
1058
발표코드
POLY.O-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 10시 : 00분
발표형식
구두발표
발표분야
고분자화학 - Oral Presentation for Young Polymer Scientists
저자 및
공동저자
MANAYATHTHEKKEYILJEENA, 최후연1, 박수진2, 유자형3,*
울산과학기술대학교(UNIST) 나노생명화학공학부, Korea
1울산과학기술대학교(UNIST) Chemistry, Korea
2울산과학기술대학교(UNIST) 에너지 및 화학공학부, Korea
3울산과학기술대학교(UNIST) 자연과학부 화학과, Korea
The electro chemical performance of Li ion battery (LIB) can be highly tuned by various factors which include morphology of anode material, nature of electrolyte and binding material, percentage of conducting materials etc. Among them, binding material have been attracted by researchers over decades, which results in the introduction of different polymeric binder, originated from nature, such as poly acrylic acid, carboxy methyl cellulose, alginic acid etc. for Si anode of LIBs. Recently several synthetic and structural modifications of these conventional polymeric binders, for example, random co polymer of polyacrylic acid with vinyl alcohol, porous scaffold of CMC, etc. has been developed by many researchers. However, the challenges of further development of Li ion rechargeable batteries still exists because of some unique property possessed by Li batteries, such as high energy density, high specific capacity and light weight to carry. Inspired from these advantages of LIBs, here in, we introduce a novel polymeric binder for Si anodes in LIB as an effort to improve the columbic efficiency and cycle durability of LIBs. We report, novel random copolymers, poly(tert-butyl acrylate-co-triethoxyvinylsilane) and Poly(acrylic acid-co-vinyl alcohol) as an efficient binders with ICE of more than 80% for LIBs. The binders form cross linking under thermal treatment, demonstrated by FT-IR, helps to minimize the pulverization of Si nano particle in the anode. In this present work we find out the optimum percentage of each monomer composition in the random co polymer by analyzing the electro-chemical-mechanical properties of series of synthesized random copolymers.

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