Preparation and properties of (NixCo1-x)0.85Se nano spherical cathode material for supercapacitor

化学工业与工程

Chemcial Industry and Engineering

2025, Vol. 42

Issue (1) :69-77 DOI: 10.13353/j.issn.1004.9533.20220323

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Preparation and properties of (Ni_xCo_1-x)_0.85Se nano spherical cathode material for supercapacitor

ZHANG Weiguo^1,2, CHEN Guangyao¹, WANG Hongzhi¹, YAO Suwei¹

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Tianjin University of Sport, Tianjin 301617, China

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Abstract Ni-Co bimetal selenide (Ni_xCo_1-x)_0.85Se electrode material was prepared by solvothermal method. The microstructure and elemental composition of the electrode material were measured by XRD, SEM, TEM and XPS. The electrochemical properties of the electrode material were tested by three-electrode system. (Ni_xCo_1-x)_0.85Se presents a nano-spherical structure with a diameter of 200—500 nm. By adjusting the experimental conditions, the materials with different Ni/Co ratios were synthesized, in which (Ni_0.50Co_0.50)_0.85Se had the maximum specific capacitance (2 900 F·g^-1, 1 A·g^-1). (Ni_0.50Co_0.50)_0.85Se was assembled with activated carbon to form hybrid supercapacitor, and the cycle stability was good (the capacitance retention rate was 83.21% after 2 500 charge-discharge cycles at 1 A·g^-1 current density), indicating that Ni-Co selenide has high application value in the field of supercapacitor.

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	ZHANG Weiguo
	CHEN Guangyao
	WANG Hongzhi
	YAO Suwei

Keywords： nickel cobalt selenide； hybrid supercapacitor； nano spherical material

Received 2022-04-20;

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ZHANG Weiguo, CHEN Guangyao, WANG Hongzhi, YAO Suwei.Preparation and properties of (Ni_xCo_1-x)_0.85Se nano spherical cathode material for supercapacitor[J] Chemcial Industry and Engineering, 2025,V42(1): 69-77

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