다공성 복합 고분자 멤브레인과 이온전도성 모노머의 인시튜 중합을 이용한 복합 고체 고분자 전해질 제조

다국어 초록 (Multilingual Abstract)

A composite solid polymer electrolyte (CSPE) was synthesized by incorporating Li<SUB>1.5</SUB>Al<SUB>0.5</SUB>Ge<SUB>1.5</SUB> (PO₄)₃ (LAGP) powder into a poly(Vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) matrix forming a composite solid polymer (CSP) membrane, followed by the in-situ polymerization of vinyl ethylene carbonate (VEC) monomer. The microstructure and morphology of the CSPE were characterized using SEM and XRD techniques. The ionic conductivity of the CSPE was recorded as 0.445 mS cm<SUP>-1</SUP> at 30℃, and it exhibited electrochemical stability up to 5.01 V. Electrochemical performance was evaluated through charge/discharge cycles using a Li/CSPE/NCM811 cell configuration. The cell employing LAGP-enhanced CSPE demonstrated a discharge capacity of 107.87 mAh g<SUP>-1</SUP> and a coulombic efficiency of 99.2% over 100 cycles at 30oC and a 0.5 C rate. These findings suggest that the developed CSPE holds considerable potential as an electrolyte in solid-state batteries.