吴宇平-锂离子电池安全问题解决的关键-聚合物电解质.pdf

锂离子电池安全问题解决的关键 -聚合物电解质 吴宇平 复旦大学化学系新能源与材料实验室 上海200433 Tel/Fax: +86-21-5566 4223 Email: wuyp@ @ 锂离子电池新材料国际论坛 深圳，2010年7月29 日 Outline • Introduction • GPEs based on crosslinked structure • Porous GPEs based on P(AN-MMA) • GPEs based on P(VDF-HFP) • Sandwiched GPEs • Other GPEs such as stick-like ones • Summary • Acknowledgement NEML, Fudan Uni. 1. Introduction Cathode: LiCoO Anode: graphitic carbon 2 charge + - Li /e Li+ /e- discharge Charge Anode: 6 C + x Li+ + x e- Li C x 6 Charge Discharge Cathode: LiCoO Li CoO + x Li+ + x e- 2 Discharge 1-x 2 Charge Total: 6 C + LiCoO Li CoO + Li C 2 Discharge 1-x 2 x 6 Y.P. Wu et al., Lithium ion batteries: Practice applications, Chemical Industry Press, 2004. NEML, Fudan Uni. Characteristics of lithium ion battery • High output voltage (average 3.6V) and power • High energy density (UR18650: 450 Wh/cm3, 150Wh/kg) • Low self discharge (10%/month) • No memory effect • Long cycle life (1000 times) • High rate capability (1