摘要
以聚乙烯基吡咯烷酮(PVP)与聚偏氟乙烯-六氟丙烯[P(VDF-HFP)]的混合物为基质,用相转移法制备了聚合物电解质P(VDF-HFP)/PVP。采用扫描电子显微镜、交流阻抗和线性扫描伏安方法对聚合物电解质进行了表征,并对组装的Li-CoO2/Li聚合物锂离子电池进行了性能检测。结果表明:这种聚合物电解质具有丰富的微孔,吸液率可达到530%,电化学稳定窗口为5.50 V,室温下的离子电导率为5.85×10-3S/cm;聚合物锂离子电池0.1C充放电时,首次放电容量为136mAh/g,放电平台约为3.88 V;30次循环后,放电容量仍保持在139 mAh/g。循环过程中,充放电效率为98.9%,1C放电容量为0.1C放电容量的94%。
P（ VDF-HFP）/PVP polymer electrolyte based on the blend of PVP and P（VDF-HFP） was prepared by phase transfer method. The performance of the polymer electrolyte was characterized by SEM, AC impedance and linear scan voltammetry methods. The performance of LiCoO2/Li polymer Li-ion cell was tested. The results showed that the polymer electrolyte had abundant mieropores and its liquid absorption rate was 530%. The electrochemical stable window of the polymer electrolyte was 5.50 V, and its ionic conductivity was 5.85×10^-3 S/cm at room temperature. The initial discharge capacity of the polymer Liioncell was 136 mAh/g and discharge plateau was about 3.88 V at 0, 1 C. After 30 cycles, its discharge capacity kept 139 mAh/g. The charge-discharge efficiency was 98.9% during the cycling, When discharging at 1 C, it retained 94% of the discharge capacity at 0.1 C.
出处
《电池》
CAS
CSCD
北大核心
2006年第4期260-262,共3页
Battery Bimonthly
基金
国家高技术研究发展计划项目(2003AA32X010)
