P(VdF-co-HFP)/Cellulose acetate를 이용한 리튬 이차전지용 겔 폴리머 전해질의 제조 및 전기 화학적 특성 연구

Abstract

Microporous gel electrolyte with high affinity for electrolyte solution was prepared and characterized. To attain high ionic conductivity and good mechanical strength of the gel electrolytes, we used a blend of P(VdF-co-HFP) and cellulose acetate (CA) as a matrix polymer. The porous membrane was prepared by a phase-inversion method, which has been shown to be effective for producing a porous structure. Gel electrolytes was prepared by soaking the porous membranes in an electrolytes solution, and their electrochemical characteristics are investigated. These porous membranes are found to encapsulate high amounts of electrolyte solution, without solvent leakage, while maintaining good mechanical properties. The blend polymer with composition of P(VdF-co-HFP)/Cellulose acetate shows ionic conductivity 3.57×10¯³(S/cm) at room temperature in the presence of 1M LiClO₄/EC-PC.