التفاصيل البيبلوغرافية
| العنوان: |
Interfacial polymerization of PEDOT sheath on V2O5 nanowires for stable aqueous zinc ion storage. |
| المؤلفون: |
Ting Yang, Diheng Xin, Nan Zhang, Jing Li, Xianchi Zhang, Liqin Dang, Qi Li, Jie Sun, Xuexia He, Ruibin Jiang, Zonghuai Liu, Zhibin Lei |
| المصدر: |
Journal of Materials Chemistry A; 5/7/2024, Vol. 12 Issue 17, p10137-10147, 10p |
| مستخلص: |
V2O5 is one of the promising cathodes for aqueous zinc ion batteries. However, its performance is largely hindered by its low conductivity and poor cycling stability due to the electrode dissolution. In this work, an interfacial polymerization strategy is developed to prepare the V2O5@poly(3,4-ethylenedioxythiophene) (PEDOT) core-sheath nanowire electrode. The interfacial redox reactions between the vapor 3,4-ethylenedioxythiophene molecules and V2O5 nanowires initiate the polymerization reaction to yield uniform PEDOT sheaths with varying thickness controlled by the reaction duration. The PEDOT sheaths are found to improve the electrode conductivity, suppress the V2O5 nanowire dissolution, and improve the specific capacity. Theoretical simulation further shows that the PEDOT sheath weakens the interactions between Zn2+ and the V2O5 host, thus benefiting the extraction of Zn2+ from the host electrode and boosting the cycling stability. Consequently, V2O5@PEDOT-50m delivers a specific capacity of 293 mA h g-1 at 0.1 A g-1 and 225 mA h g-1 at 1 A g-1, which are superior to 205 mA h g-1 and 142 mA h g-1 of the pristine V2O5 nanowire electrode, respectively. Moreover, V2O5@PEDOT-50m maintains 97.8% and 99% capacity retention after 100 and 2000 cycles, respectively. The significantly enhanced performances with respect to the corresponding V2O5 nanowire counterpart demonstrate that the PEDOT sheaths developed by the interfacial polymerization could become an effective method to stabilize the vanadate-based cathodes for zinc ion storage. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |