在CuNi2S4纳米圈上支持NiCoSe2纳米板的构建,用于先进的混合超级电容器
Xianfeng Sun1, Yan Zhang1, Cheng Du1
1Hubei Key Lab for Processing and Application of Catalytic Materials, Hubei Provincial Engineering Research Center of High Purity Raw Material Processing Technology of Electronic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang 437000, China.
为先进的超级电容器开发了一种新的CuNi2S4@NiCoSe2混合电极材料. 这种材料表现出卓越的性能,为储能应用提供高能量密度和出色的稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 与其他电活性材料混合过渡金属硫化物 (TMS) 是开发超级电容器 (SC) 先进电极材料的关键策略.
- 接口工程对于优化储能器件中电极材料的性能至关重要.
研究的目的:
- 合成一种具有核心外架构的新型柔性CuNi2S4@NiCoSe2混合电极材料.
- 研究用于超级电容器应用的CuNi2S4@NiCoSe2混合材料的电化学性能.
- 在混合结构中评估CuNi2S4和NiCoSe2之间的协同效应.
主要方法:
- 使用单步电沉积程序,在碳布 (CC) 上生长CuNi2S4纳米球.
- 双金属化物NiCoSe2随后沉积在CuNi2S4纳米球上,形成CuNi2S4@NiCoSe2核心外结构.
- 使用诸如循环电压测量,静电电荷放电和电化学阻抗光谱等技术来表征电化学性能.
主要成果:
- 该CuNi2S4@NiCoSe2电极在1Ag-1.0下表现出979.2Cg-1/3.43Ccm-2的高容量.
- 混合电极表现出良好的速率性能,并且性能优于原始的CuNi2S4和NiCoSe2电极.
- 使用这种阴极和松花粉衍生的阳极的混合超级电容器实现了78.9Wh kg-1的能量密度,并在5万个循环后保持了91.4%的容量.
结论:
- 这种类似纳米花的混合结构增强了氧化还原活性点,并改善了电子/离子运输动力学.
- 在CuNi2S4的导电性和NiCoSe2的电活性之间的协同效应有助于优越的超容量行为.
- CuNi2S4@NiCoSe2异构结构是先进的储能系统的有前途的电极材料,因为它的结构优势和优异的电化学性能.
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