LiFePO_4/MWNTs/BC复合材料的制备及电化学性能  

Synthesis and Electrochemical Performance of LiFePO_4/MWNTs/BC Composite

作　　者：张勇[1,2] 霍庆媛[3] 王力臻[1,2] 张爱勤[1,2] 宋延华[1,2] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002 [2]河南省表界面科学重点实验室,河南郑州450002 [3]郑州轻工业学院艺术设计学院,河南郑州450002

出　　处：《热加工工艺》2012年第24期131-133,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(21001097);河南省高校科技创新人才支持计划资助项目(2012HASTIT022);河南省科技厅基础与前沿技术研究项目(102300410107);河南省高等学校青年骨干教师资助计划项目(豫教高[2009]844号);郑州市科技攻关项目(0910SGYG23259);省部共建粉体材料与特种陶瓷重点实验室开放项目资助(0904)

摘　　要：用直接烧制法制备了竹炭(BC)材料,并采用恒流充放电、循环伏安(CV)和塔菲尔曲线研究了后期掺BC对LiFePO4/MWNTs电化学性能的影响。结果表明,后期掺杂5wt%BC时,所得LiFePO4/MWNTs/BC样品具有最佳的电化学性能;在0.1 C倍率下的放电容量为117 mAh·g-1,但与LiFePO4/MWNTs材料相比,后期掺杂BC对LiFePO4/MWNTs的电化学性能改善不明显。Bamboo charcoal （BC） was synthesized by direct calcination reaction. The effects of BC adding during the later stage on the behaviors of LiFePO4/MWNTs were investigated by galvanostatic current charge-discharge, cyclic voltammetry （CV） and Tafel curves. The results show that as-prepared LiFePO4/MWNTs/BC composite with BC 5wt% exhibits the best electrochemical performance. The initial discharge specific capacity is 117 mAh. g-1 at 0.1 C. Compared with the composite, the as-prepared LiFePO4/MWNTs/BC sample doped with BC during the later stage has little effects on the electrochemical properties of the composite.

关 键 词：竹炭 直接烧制法 LiFePO4/MWNTs/BC 

分 类 号：TB332[一般工业技术—材料科学与工程]