以超导炭黑为还原剂制备磷酸钒锂  

Preparing lithium vanadium phosphate by superconducting carbon black as reductant

作　　者：曹福彪[1] 马叙[1] 吕菲[2] 徐宁[2] 

机构地区：[1]天津理工大学材料科学与工程学院,天津300384 [2]天津巴莫科技股份有限公司,天津300384

出　　处：《电池》2011年第1期2-4,共3页Battery Bimonthly

基　　金：天津市应用基础及前沿技术研究计划重点项目(08JCZDJC10100)

摘　　要：以超导炭黑为还原剂,经湿法球磨、高温碳热烧结合成锂离子电池正极材料Li3V2（PO4）3,并进行XRD分析、元素分析和充放电测试。所得材料为单斜结构,晶粒表面光滑,导电炭颗粒均匀附着在上面,提高了导电性。组装的CR2025型电池以0.1C在3.0-4.3 V循环,材料的首次充电比容量为126.16 mAh/g,首次充放电效率为97.4%。组装的053048型电池以1.0C在3.0-4.3 V循环1 500次,容量保持率为82%;15.0C放电容量可达1.0C充电容量的73.3%。Li-ion battery cathode material Li3V2（PO4）3 was synthesized by wet-milling carbon-thermal reduction method,using superconducting carbon black as reductant.The XRD analysis,elemental analysis and charge-discharge tests were taken.The synthesized material was monoclinic structure,the crystal surface was smooth and the conductive carbon particles uniformly attached to the surface to improve the conductivity.When the assembled CR2025 type cell cycled with 0.1 C in 3.0～4.3 V,the initial specific charge capacity of material was 126.16 mAh/g,the initial charge-discharge efficiency was 97.4%.The capacity retention ratio of the assembled 053048 type battery was 82% when cycled 1 500 times with 1.0 C in 3.0～4.3 V,the 15.0 C discharge capacity could reach 73.3% of 1.0 C charge capacity.

关 键 词：碳热还原 磷酸钒锂[Li3V2(PO4)3] 超导炭黑 

分 类 号：TM912.9[电气工程—电力电子与电力传动]