摘要
通过高温固相法合成锂离子电池正极材料Li0.98M0.02Fe0.95V0.05PO4/C(M=Mg、Ti、Al、Ni、Zr、Mo和Mn),用XRD、循环伏安(CV)、电化学阻抗谱(EIS)和恒流充放电等方法研究了产物的性能。金属掺杂后的材料,首次充放电比容量均高于未掺杂的纯相材料。在室温下,掺杂Mg的材料在4.2～2.4 V充放电,0.1C首次放电比容量可达154.1 mAh/g,且高倍率充放电比容量高于纯相材料,循环性能稳定,具有较好的电化学性能。
Li-ion battery cathode materials Li0.9s M0.02Fe0.95V0.05PO4/C（ M = Mg, Ti, Al, Ni,Zr, Mo and Mn） were synthesized via high-temperature sol/d-state method.XRD, cyclic voltammetry（CV）, electrochemical impedance spectroscopy（EIS） and galvanestatic charge-discharge methods were used to study the performance of the products. The specific charge and discharge capacity of the material which was doped small amounts of metal was higher than the undoped pure phase material. When the material doped Mg charged-discharged in 4.2 - 2.4 V at room temperature, the 0.1 C initial specific discharge capacity cottld reach 154.1 mAh/g, the high rate specific discharge capacity of the material was higher than the pure phase material. Its cycle performance was stable and electrocl/emical performance was fine. Key words： lithium iron phosphate（ LiFePO4）; doped; electrochemical performance; high-temperature solid-state method
出处
《电池》
CAS
CSCD
北大核心
2012年第2期96-99,共4页
Battery Bimonthly
关键词
磷酸铁锂(LiFePO4)
掺杂
电化学性能
高温固相法
lithium iron phosphate（LiFePO4）
doped
electrochemical performance
high-temperature solid-state method
