화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.4, 297-308, June, 2002
Export Citation
리튬 2차전지용 완전 고체형 고분자 전해질
Solid Polymer Electrolytes for Secondary Lithium Batteries
송기상, 이원실, 이인재, 서동학†
  • 한양대학교 화학공학과 정보통신소재연구실
Gi Sang Song, Won Sil Lee, In Jai Lee, and Dong Hack Suh†
  • Department of Chemical Engineering, Hanyang University, Korea
E-mail:
초록
고체형 고분자 전해질은 리튬 이온 이차전지의 실용화 가능한 이온전도도인 10(-3) S/cm를 달성하기 위하여 여러 가지 방법으로 이온전도도의 향상을 위한 연구 및 개발이 진행되고 있다. 이들 방법의 커다란 두 가지 맥락은 고분자의 Tg를 낮추거나, 이온 이동의 에너지를 낮추는 방법으로, 이를 구현하기 위하여 폴리에틸렌옥사이드 빗살형(PEO comb-type) 공중합체, 실록산 및 포스파진 같은 유연성 고분자의 공중합, 기타 고분자 블렌드, 필러 첨가형 컴퍼지트, 단일이온종 전도체(Single Ionic Conductor, SI C) 합성, 결정구조에 의한 이동 통로의 설계 연구 등이 진행되고 있다. 그러나 아직까지 이온전도도 10(-3) S/cm를 달성한 완전 고체형 고분자 전해질은 보고된 바 없으며 보다 새로운 개념의 전해질 개발이 요구되고 있다. 이에 본고에서는 고체형 고분자 전해질의 개발 현황 및 연구 방향에 대해서 집중적으로 다루었다.
Presently, polymer lithium batteries are being actively developed by many research groups, and they are in constant search of a novel polymer electrolyte. High specific energy and power, safe operation, flexibility in packaging, and low cost of processing are the characteristics sought in a polymer electrolyte for uses in lithium batteries. Various concepts are being investigated to develope a novel polymer electrolyte with high ionic conductivity in the range of 10(-3) S/cm. Some representative concepts are the usage of polyethyleneoxide comb type copolymers; copolymers with flexible polymers (polysiloxane, phosphazene, etc.); and polymer blends. Other concepts make use of polymer electrolytes; compoistes with fillers and single ionic conductors; and ion transporting crystal structures. However, no one strategy has yet led to a "breakthrough" in the technical application. For a pure solid polymer electrolyte, the maximum ionic conductivity of 10(-4) S/cm at room temperature has been reported thus far. In this study, the current concepts and development trends in pure solid type polymer electrolytes are reviewed.
Keywords:solid polymer electrolyte;ionic conductivity;lithium battery
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