Enhanced synergistic effect of NiCo sulfide nanorod arrays with high mass loading on carbon cloth for hybrid supercapacitors: The role of compositional regulation

被引：4

作者：

Chen, Lu ^{[1
]}

Chen, Shihuan ^{[1
]}

Chen, Gang ^{[1
]}

Deng, Jiahua ^{[1
]}

Xu, Xuetang ^{[1
]}

Wang, Fan ^{[1
]}

机构：

[1] School of Chemistry & Chemical Engineering, Guangxi University, Guangxi Key Laboratory of Electrochemical Energy Materials, Nanning,530004, China

来源：

Journal of Alloys and Compounds | 2024年 / 997卷

基金：

中国国家自然科学基金;

关键词：

Binary alloys - Carbon - Cobalt alloys - Cobalt compounds - Electrodes - Electrolytes - Loading - Morphology - Nanorods - Nickel compounds - Sulfur compounds;

D O I：

10.1016/j.jallcom.2024.174819

中图分类号：

学科分类号：

摘要：

Achieving an enhanced synergistic effect and controlling the morphology of active materials to facilitate electrolyte access are crucial for the design of high-mass-loading electrode. In this work, NiCo sulfide nanorod arrays were grown on a carbon cloth (CC) substrate via a two-step hydrothermal deposition strategy. The compositional effect was employed to modify the growth behavior, hierarchical morphology, and synergistic effect of the as-obtained electrodes. The contents of Ni-S and Co-S species and the resistance nature of the electrodes can be optimized by adjusting the Co/Ni feed ratio. The optimized Ni1.5Co1.5S4/CC electrode with a high mass loading (5.54 mg cm−2) comprises vertical nanorod arrays with open channels for electrolyte access, and exhibits a high capacity of 711 C g−1 at 2 A g−1 (3.95 C cm−2 at 10 mA cm−2) with good cyclic stability. The as-assembled Ni1.5Co1.5S4/CC//activated carbon cloth (ACC) hybrid supercapacitor delivers a high areal capacity of 1.96 C cm−2 at 5 mA cm−2 with excellent rate performance and achieves a high energy density of 0.49 mWh cm−2 at a power density of 4.5 mW cm−2. These achievements represent a promising concept for the practical design and regulation of NiCo sulfide electrodes at high mass loading levels. © 2024 Elsevier B.V.

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