MoO_(2)/C纳米纤维复合薄膜的电化学性能  

Electrochemical Performance of MoO_(2)/C Nanofiber Composite Film

作　　者：高邦 刘颖[2] 贺志勇[1] 于盛旺[1] 孟杰[1] 马永[1] 周兵[1] 吴艳霞[1] GAO Bang;LIU Ying;HE Zhiyong;YU Shengwang;MENG Jie;MA Yong;ZHOU Bing;WU Yanxia(School of New Carbon Materials Research,Taiyuan University of Technology,Jinzhong 030600,China;School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学新型碳材料研究院,晋中030600 [2]太原理工大学材料科学与工程学院,太原030024

出　　处：《机械工程材料》2021年第6期20-25,共6页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51801133);山西省青年科学基金资助项目(201801D221135);山西省科技重大专项(20181102013);山西省“1331工程”项目(PT201801)。

摘　　要：通过静电纺丝法制备了MoO_(2)/C纳米纤维复合薄膜,其中钼酸铵与纯聚乙烯醇(AMT与PVA)质量比分别为1:9,2:8,3:7,4:6,研究了薄膜的组织结构和相应电极的电化学性能。结果表明:随着AMT与PVA质量比增加,MoO_(2)/C纳米纤维复合薄膜的纤维尺寸减小且分布更均匀,纤维成丝效果改善,相应电极的比电容增大,循环性能增强;AMT与PVA质量比为4∶6时,薄膜纤维成丝效果最好,相应电极在充放电循环过程中具有良好的结构稳定性;且5000次充放电后的循环保持率、充电比容量、放电比容量及充放电效率均增加,循环性能优异。MoO_(2)/C nanofiber composite films were prepared by electrospinning with mass ratios of ammonium molybdate(AMT)to pure polyvinyl alcohol(PVA)of 1:9,2:8,3:7,4:6,respectively.The microstructure of the film and the electrochemical property of the corresponding electrode were studied.The results show that with increasing AMT to PVA mass ratio,the fiber size of the MoO_(2)/C nanofiber composite film decreased,the fiber distribution became uniform,and the filament forming effect was improved.Moreover,the specific capacitance of the corresponding electrode increased,and the cycle performance was enhanced.When the AMT to PVA mass ratio was 4∶6,the filament forming effect of the film was the best,and the corresponding electrode had good structural stability in the charge and discharge cyclic process.Meanwhile its cycle retention rate,charge specific capacity,discharge specific capacity and charge-discharge efficiency all increased after 5000-cycle charge-discharge cycles,and the cycle performance was excellent.

关 键 词：静电纺丝 MoO_(2)/C纳米纤维复合薄膜 电化学性能 

分 类 号：TB33[一般工业技术—材料科学与工程]