摘要
以微波辅助氯化胆碱-乙二醇合成的纺锤体LiMnPO_4纳米颗粒为原料,采用喷雾干燥法制备LiMnPO_4/C多孔微球,采用X射线衍射(XRD)、场发射扫描电镜(FE-SEM)、拉曼光谱(Raman)、比表面积(BET)及孔径分析(BJH)、恒流充放电技术、循环伏安(CV)、电化学阻抗谱(EIS)等研究了焙烧时间对LiMnPO_4/C多孔微球的结构、形貌和电化学性能的影响。结果表明:在焙烧时间为5 h时,合成材料的电化学性能最好,1C倍率下首次放电比容量为140 mA·h/g,100次循环后容量保有率为95%,5C下放电比容量为119 mA·h/g,表现出了良好的循环性能和倍率性能。
Porous LiMnPO4/C microshperes were prepared by spray drying process with spindle-like LiMnPO4 nanoparticles as raw materials synthesized by microwave-assisted choline chloride-ethyene glycol reaction.Influences of calcination time on the structure,morphology and electrochemical performance of LiMnPO4/C were characterized by XRD,FE-SEM,BET,CV,EIS and galvanostatic charge-discharge tests.Results showed that：the porous LiMnPO4/C microshperes delivered an initial discharge capability of 140 mA·h/g and 119 mA·h/g at 1 C and 5 C,respectively,maintained about 95% of the capability after100 cycles at 1 C,showing good cycle performance and rate performance.
出处
《无机盐工业》
CAS
北大核心
2018年第2期24-28,共5页
Inorganic Chemicals Industry
基金
国家自然科学基金资助项目(21366006)
