Citation: Wang Yuting. Study on Preparation of WO_3-x/C Nanocomposite by PECVD Method and Their Lithium-Ion Storage Properties[J]. Chemistry, ;2020, 83(6): 557-563, 575. shu

Study on Preparation of WO_3-x/C Nanocomposite by PECVD Method and Their Lithium-Ion Storage Properties

Wang Yuting

School of Environmental Economics, Henan Finance University, Zhengzhou, 450046

Received Date: 7 January 2020
Accepted Date: 30 January 2020

Figures(5)

By virtue of the high theoretical capacity (~700 mAh·g^-1) in lithium-ion battery and the comparatively low cost, tungsten trioxide (WO₃) has attracted great interest of researchers. However, it still suffers from its low conductivity and the severe volume variation during the discharge/charge processes, which lead to the inferior rate performance and cycling performance. To enhance its conductivity and mitigate the adverse effects caused by the volume variation, a plasma-enhanced chemical vapor deposition (PECVD) method was successfully used to coat nitrogen-doped amorphous carbon on defective WO_3-x nanosheets. N-doped amorphous carbon coating can effectively alleviate the unsatisfactory volume variation effects, and provide more sites for lithium-ions to insert and extract. The electrochemical evaluations demonstrated that the prepared WO_3-x/C electrode exhibits superior rate and cycle performance than that of WO_3-x electrode and commercial WO₃ electrode. Dynamic simulation and analysis suggested that the WO_3-x/C electrode has smaller charge transfer resistance and the faster lithium-ion diffusion coefficient, thereby effectively improving its electrochemical performance.
- Tungsten trioxide,
- WO_3-x/C nanocomposite,
- Chemical vapor deposition,
- Lithium-ion battery
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Study on Preparation of WO3-x/C Nanocomposite by PECVD Method and Their Lithium-Ion Storage Properties

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通讯作者: 陈斌, bchen63@163.com

Study on Preparation of WO_3-x/C Nanocomposite by PECVD Method and Their Lithium-Ion Storage Properties