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Fabrication and Electrochemical Characterization of PAMS-based Gel-polymer Lithium Batteries
Zhou Yifeng1,2, Xie Song1, Chen Chunhua*1
1.Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026;2.School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039
Abstract:
An admixture of acrylonitrile, methyl methacrylate, styrene and commercial liquid electrolyte (LB302, 1 mol/L solution of LiPF6 in 1∶1 EC/DEC) was enclosed in CR2032 cells. The assembled cells were then γ-ray irradiated using configurations of LiNi0.8Co0.2O2/Li half cells. Through this in-situ irradiation polymerization process, rechargeable lithium cells with poly(acrylonitrile-co-methyl methacrylate-co-styrene) (PAMS) were obtained based gel polymer electrolytes. The structure and thermal stability of PAMS were characterized by FT IR and DSC analyses. The electrochemical properties and charge discharge performance of PAMS-based gel-polymer lithium cells were evaluated by AC impedance spectroscopy, cyclic voltammetry and gavanostatic battery cycling. The results indicate that the in-situ gama-ray irradiation approach is convenient to prepare gel-polymer lithium cells with good charge-discharge performance.
Key words:  Lithium-ion batteries, Gel-polymer electrolytes, PAMS, γ-ray Irradiation
FundProject:
附件
PAMS基凝胶型聚合物锂电池的制备及电化学性能表征
周艺峰1,2, 谢松1, 陈春华*1
1.中国科学技术大学材料科学与工程系,合肥,230026;2.安徽大学化学化工学院,合肥,230039
摘要:
将丙烯腈、甲基丙烯酸甲酯和苯乙烯按一定的摩尔比同电解液LB-302(1 mol/L LiPF6的1∶1 EC∶DEC溶液)进行混合制成凝胶型聚合物电解质前驱体,将此凝胶型聚合物电解质前驱体同电极材料和隔膜一起组装成扣式CR2032锂电池,再将此电池经γ射线原位辐照聚合制得三元共聚物(PAMS)为基体的凝胶型聚合物电解质可充电锂电池.用傅里叶红外和差示扫描量热对原位辐照聚合所制得的PAMS的结构和热稳定性进行了表征.并用交流复阻抗谱、循环伏安法和恒流充放电等技术对PAMS基凝胶型聚合物电解质锂电池进行了电化学性能表征.结果表明采用原位聚合法制备凝胶型聚合物锂电池不仅工艺简便,而且所制得的电池的充放电性能较好.
关键词:  锂离子电池  凝胶型聚合物电解质  PAMS  γ射线原位辐照
DOI:10.1088/1674-0068/18/5/837-841
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