粘结剂对石墨负极性能的影响  

Influence of binder on the performance of graphite anode

作　　者：庄全超[1] 魏国祯[2] 董全峰[2] 孙世刚[2] 

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116 [2]厦门大学化学系,固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《电池》2009年第3期120-122,共3页Battery Bimonthly

基　　金：国家重点基础研究发展规划(973)项目(2009CB220102);中国矿业大学青年科技基金(ON080282)

摘　　要：研究了水溶性粘结剂F-103和油性粘结剂P（VDF-HFP）对锂离子电池石墨负极电化学性能和表面SEI膜成膜机理的影响。循环伏安的结果表明：在1mol／L LiPF6／EC＋DEC＋DMC电解液中，油性粘结剂石墨负极的电化学性能较好。电化学阻抗谱的结果表明：水溶性粘结剂石墨负极和油性粘结剂石墨负极表面SEI膜的成膜电位分别为1．00-0．60V和0．80～0．55V。油性粘结剂石墨负极表面SEI膜的稳定性较好。The influences of water-soluble binder F-103 and oiliness binder P（ VDF-HFP）on the electrochemical performance and the surface SEI film formation mechanisms of graphite anode for Li-ion battery were researched. The results of cyclic vohammetry showed that the graphite anode with oiliness binder had better electrochemical performance in 1 mol/L LiPF6/EC ＋ DEC ＋ DMC. The results of electrochemical impedance spectroscopy showed that the SEI film formation potential on graphite anode with oiliness binder and with water-soluble binder were between 1.00 - 0.60 V and 0.80 - 0.55 V, respectively. The stability of surface SEI film on the graphite anode with oiliness binder was better.

关 键 词：石墨负极 粘结剂 SEI膜 电化学阻抗谱 

分 类 号：TM912.9[电气工程—电力电子与电力传动]