摘要
采用超声波混合、抽滤的方法把多壁碳纳米管(MWCNTs)和乙炔黑混合制备了锂离子电池用复合导电剂浆料,用扫描电子显微镜(SEM)和恒流充放电测试考察了复合导电剂的结构和其作为导电剂对LiCoO_2电极放电比容量的影响。SEM的分析结果表明MWCNTs和乙炔黑实现了纳米层次的均匀混合。复合导电剂悬浮液和浆料分别被用作导电剂制成了两种LiCoO_2电极,前一种电极为Cathode A,后一种电极为Cathode B,考察了不同MWCNTs含量时,两种电极0.5C第10次放电比容量的差异。实验结果表明,随着MWCNTs含量的增加,两种电极放电比容量的差值增大,说明低含量MWCNTs的复合导电剂浆料是一种理想的锂离子电池导电剂。
Multi-component conductive additive for lithium ion battery was prepared by mixing multi-walled carbon nanotubes （MWCNTs） and acetylene black （AB） under ultra sonic treatment and filtrating the prepared suspensions. The structure of multi-component conductive additive was determined by scanning electron microscope （SEM）. SEM result showed the AB and MWCNTs were uniformly dispersed in nano scale. Multi-component conductive additive suspension and multi-component conductive additive paste were used as conductive additive to prepare LiCoO2 cathode. The former was designated as cathode A and the later was designated as cathode B. The discharged capacity of LiCoO2 at a rate of 0.5 C was measured by constant charge-discharged method. The difference of discharged capacity of the two cathodes was calculated. The result showed that the difference increased with the mass fraction of MWCNTs increasing. It indicated WNCC with a low mass fraction of MWCNTs was easily dispersed and it was an ideal conductive additive for LiCoO2 cathode.
出处
《合成化学》
CAS
CSCD
2007年第B11期29-33,共5页
Chinese Journal of Synthetic Chemistry
基金
国家973重大科学研究计划(2006CB932703)
中国科学院知识创新工程重要方向项目(KJCX2-YW-M01)
杉杉科技创业园委托项目
关键词
导电剂
多壁碳纳米管
乙炔黑
锂离子电池
conductive additive
multi-walled carbon nanotubes
acetylene black
lithium ion battery
