Oxygen‐vacancy‐rich hydrated bimetallic chloride for supercapacitor cathode with remarkable enhanced performance,International Journal of Energy Research

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Oxygen‐vacancy‐rich hydrated bimetallic chloride for supercapacitor cathode with remarkable enhanced performance
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-09-14 , DOI: 10.1002/er.5986
Guorong Wang _{1,

2} , Zhiliang Jin _{1,

2} , Tiansheng Zhao ₃

Affiliation

In this study, a series of nickel/vanadium composites were acquired via a simple in situ growth strategy with the sodium chloride as a regulator. The phase, component, and electrochemical energy storage behavior of the as‐prepared electrodes were investigated. Thanks to the addition of sodium chloride for the accession of oxygen vacancy, the prepared composite electrodes show excellent supercapacitor behavior. The resultant NVC‐1.8Ov electrode demonstrates a impressive specific capacitance of 9.41 F cm⁻² at a current of 10 mA cm⁻², which is about 1.5 times than the NVC electrode. After 5000 charge‐discharge cycles under a current of 40 mA cm⁻², the retained 75.7% of its initial capacitance indicate a good cyclic stability. In addition, the NVC‐1.8Ov and activated carbon (AC) was used to assemble NVC‐1.8Ov//AC asymmetric supercapacitor, which deliver a maximum energy density of 0.471 mWh cm⁻² at a power density of 9.319 mW cm⁻². This work provides a new and simple strategy for the preparation of high specific capacitance of asymmetric supercapacitor positive electrode.

中文翻译：

用于超级电容器阴极的富氧空位水合双金属氯化物，性能显着增强

在这项研究中，通过简单的原位生长策略以氯化钠为调节剂，获得了一系列镍/钒复合材料。研究了所制备电极的相，组分和电化学储能性能。由于添加了氯化钠以补充氧空位，因此制备的复合电极表现出优异的超级电容器性能。所得的NVC-1.8Ov电极在10 mA cm ^-2的电流下显示出令人印象深刻的9.41 F cm ^-2的比电容，约为NVC电极的1.5倍。在40 mA cm ^-2的电流下进行5000次充放电循环后，保留的初始电容的75.7％表示良好的循环稳定性。此外，NVC-1.8Ov和活性炭（AC）用于组装NVC-1.8Ov // AC不对称超级电容器，该超级电容器在9.319 mW cm ^-2的功率密度下可提供最大0.471 mWh cm ^-2的能量密度。这项工作为制备不对称超级电容器正电极的高比电容提供了一种新的简单策略。

更新日期：2020-09-14

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