磷酸亚铁锂核壳结构材料的制备和电化学性能  

Synthesis and electrochemical property of LiFePO_4 with core-shell structures

作　　者：刘树和[1] 闻雷[1] 白朔[1] 李峰[1] 王作明[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《材料研究学报》2009年第1期22-26,共5页Chinese Journal of Materials Research

摘　　要：制备热解炭/磷酸亚铁锂和纳米炭纤维/磷酸亚铁锂核壳结构材料,研究了电化学性能.结果表明,热解炭和纳米炭纤维包覆层能有效地降低磷酸亚铁锂材料的电阻率,大大提高材料的充放电容量和循环稳定性.与热解炭相比,纳米炭纤维具有一维结构和优异的力学性能,更适于作为磷酸亚铁锂电极材料的高效导电剂.Two types of core-shell structured cathode materials-pyrolytic carbon（PyC）/LiFePO4 and carbon nanofiber（CNF）/LiFePO4 were synthesized by fluidized bed chemical vapor deposition method and their electrochemical properties were explored. The PyC or CNF coating can effectively reduce the resistivity of LiFePO4, and greatly improved its charge-discharge capacity and cyclability. Compared with PyC, the one dimensional structure and excellent mechanical performance of CNF make it more suitable as the conductive additive of LiFePO4.

关 键 词：无机非金属材料 磷酸亚铁锂 流化床 电化学性能 

分 类 号：TB321[一般工业技术—材料科学与工程]