黏结剂对SnO_2/石墨烯负极材料电化学行为的影响  

Effects of Binders on the Electrochemical Performance of SnO_2/ graphene Anode Material

作　　者：陈然[1] 虞桢君 詹亮[1] 王艳莉[1] 张洪纲[1] 施烁思 刘越[2] 

机构地区：[1]华东理工大学,化学工程联合国家重点实验室,特种功能高分子材料及相关技术教育部重点实验室,上海200237 [2]武汉科技大学化学工程与技术学院,武汉430081

出　　处：《化学工业与工程》2014年第3期44-49,共6页Chemical Industry and Engineering

基　　金：国家自然科学基金(51002051);上海市自然科学基金(12ZR1407200)

摘　　要：针对SnO2用作锂离子电池负极材料所存在的体积膨胀率高及导电性差的不足,考察了羧甲基纤维素钠(CMC)/丁苯橡胶(SBR)和聚偏氟乙烯(PVDF)黏结剂对SnO2、SnO2/石墨烯负极材料电化学性能的影响。结果表明:1)200 mA/g下经过30次充放电循环后,当以CMC/SBR作复合黏结剂时,SnO2的首次放电容量和容量保持率分别为581.3 mA·h/g和37.6%,明显高于PVDF作黏结剂时的电化学性能(135.3 mA·h/g、10.6%);2)200 mA/g下经过100次循环后,当以CMC/SBR作复合黏结剂时,SnO2/石墨烯复合负极材料的首次放电容量、容量保持率分别为702.3 mA·h/g和43.8%,也高于PVDF作黏结剂时的电化学性能(552 mA·h/g和32.8%)。The effect of different binders （ carboxymethylcellulose/styrene-butadiene rubber and polyvinyl- idene fluoride） on the electrochemical performance of SnO2 and SnO2 graphene anode electrode was in- vestigated due to the large volume change and low electric conductivity of SnO2 anode electrode in charge- discharge process. The results can be concluded as follows： 1）The first discharge capacity and capacity retention of SnO2 anode electrode using CMC/SBR as binder after 30 cycles at 200 mA/g were 581.3 mA ~ h/g and 37.6% , which were higher than SnO： anode electrode using PVDF as binder（ 135.3 mA-h/g and 10. 6% ） ;2）The first discharge capacity and capacity retention of SnO2/graphene anode electrode u- sing CMC/SBR as binder after 100 cycles at 200 mA/g were 702.3 mA-h/g and 43.8% , which were higher than SnO2/graphene anode electrode using PVDF as binder（552 mA＇h/g and 32.8% ）.

关 键 词：二氧化锡 石墨烯 黏结剂 锂离子电池 

分 类 号：TQ15[化学工程—电化学工业]