摘要
为提高锂离子电池正极材料LiFePO4的充放电性能,用Mg,Al,V和Ti对LiFePO4进行掺杂。研究了掺杂元素的种类和用量对LiFePO4性能和结构的影响。可用高温固相反应制备单相LiMxFe1-xPO4 (M=Mg,Al,V和Ti)。在LiMxFe1-xPO4 材料中,LiV0. 05Fe0. 95PO4具有比LiFePO4更好的电化学性能,用80mA/g的电流进行充放电时,第二次放电比容量为130. 429mA·h/g,循环20次后为131. 196mA·h/g。
Mg,Al,V and Ti were doped into LiFePO_4 to improve its charge-discharge performance.The effect of the kinds of doped elements and their content on the characteristic and structure of LiFePO_4 was studied.Single phase LiM_(x)Fe_(1-x)PO_4(M=Mg, Al,V and Ti)can be prepared by the solid-state reaction.LiV_(0.05)Fe_(0.95)PO_(4) showed more higher capacity than LiFePO_4 through the research on LiM_(x)Fe_(1-x)PO_4.The second discharge capacity of 130.429 mA·h/g and the 20 th capacity of 131.196 mA·h/g can be obtained at 80 mA/g charge-discharge rate.
出处
《无机盐工业》
CAS
北大核心
2005年第4期12-14,共3页
Inorganic Chemicals Industry
基金
国土资源部盐湖资源与环境开放实验室基金(盐开 003)。
