Electrochemical Performance of MoO2/C Nanofiber Composite Film
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摘要: 通过静电纺丝法制备了MoO2/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，MoO2/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5 000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。
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关键词:
- 静电纺丝 /
- MoO2/C纳米纤维复合薄膜 /
- 电化学性能
Abstract: MoO2/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, repectively. The microstructure of the film and electrochemical property of the corresponding electrode were studied. The results show that with increasing AMT to PVA mass ratio, the fiber size of MoO2/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 5 000 charge-discharge cycles, and the cycle performance was excellent. -
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