溶胶-凝胶法制备LiFe(PO_4)_(2.99/3)Br_(0.01)/C的性能  

Performance of LiFe(PO_4)_(2.99/3)Br_(0.01)/C prepared via sol-gel method

作　　者：郑杰[1] 雍厚辉[1] 高聪[1] 杨文忠[1] 

机构地区：[1]南京工业大学理学院,江苏南京210000

出　　处：《电池》2013年第3期130-132,共3页Battery Bimonthly

摘　　要：通过溶胶-凝胶法制备了橄榄石型磷酸铁锂(LiFePO4),并通过掺杂溴离子提高材料的电化学性能。用XRD、SEM和充放电测试研究样品的晶体结构、形貌和电化学性能。掺杂溴离子的产物LiFe(PO4)2.99/3Br0.01/C,晶体结构和形貌都没有很大的改变,具有3.45 V的放电电压平台,在2.2～4.3 V循环,0.2 C放电比容量最高为142.0 mAh/g。Olivine-type lithium iron phosphate （LiFePO4）was prepared via sol-gel method, bromide ion was doped to improve electrochemical performance of the material. Crystal structure,morphology and electrochemical performance of the samples were investi- gated by XRD, SEM and charge-discharge tests. The crystal structure and morphology of product LiFe （PO4）2.99/3 Br0 01/C which doped bromide ion had not significant change. It had the discharge voltage flat of 3.45 V, when cycled in 2. 2 - 4. 3 V, the highest specific discharge capacity at 0. 2 C was 142. 0 mA1Cg.

关 键 词：磷酸铁锂(LiFePO4) 掺杂 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]