MnO/C自支撑复合纳米纤维膜的制备及其电化学性能  

Preparation and electrochemical performance of free-standing MnO/C composite nanofibers electrode

作　　者：王娟[1] 岳子双 宋伟[1] 李丽[1] 蔡建信[1] 吁霁[1] 杨震宇[1] 

机构地区：[1]南昌大学化学学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2017年第2期108-112,共5页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(21263016;21363015;51662029)

摘　　要：以MnO_2/PAN/DMF为前驱体,通过静电纺丝和惰性气氛下退火处理制备出MnO/C纳米纤维,对样品进行了XRD、SEM以及电化学性能分析。结果表明:制得的复合膜纤维直径为300~500 nm;其中MnO_2添加量为1.0g时制得的纳米纤维膜的形貌和性能最理想,当电流密度为1.0 A·g^(-1)时,经过200个循环,容量仍然保持在320mA·h·g^(-1);在电流密度3.0 A·g^(-1)下,可逆容量为201 mA·h·g^(-1),展现了极好的倍率性能和循环性能。MnO/C nanofibers were fabricated via electrospinning MnO2 salt-polyacrylonitrile precursors in N,N-dimethylformamide solvent and the subsequent carbonization in inert gas. The samples were characterized by SEM, XRD and electrochemical performance tests. The results showed that the nanofibers diameters were 300 -500 nm, and its morphology and electrochemical performance were the best when the MnO2 content was 1.0 g, it exhibited excellent cyclability of 320 mA·h·g^-1 after 200 cycles at a current density of 1.0 A·g^-1, it also has a large rate capacity of 201 mA·h·g^-1 at a current density of 3.0 A·g^-1.

关 键 词：一氧化锰 自支撑复合纳米纤维膜 负极材料 锂离子电池 

分 类 号：O646[理学—物理化学]