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Nickel selenide/nickel hydroxide composite material applied to supercapacitor and preparation method of nickel selenide/nickel hydroxide composite material

A technology of supercapacitors and composite materials, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve problems such as limiting the large-scale application of composite materials, and achieve the benefits of electrochemical reactions, increase capacitor capacity, and high specific capacitance. Effect

Inactive Publication Date: 2019-05-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, how to prepare Ni(OH) with excellent supercapacitor performance by a reasonable and efficient method 2 / NiSe 2 still under investigation, thus greatly restricting the Ni(OH) 2 / NiSe 2 Large-scale application of composite materials

Method used

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  • Nickel selenide/nickel hydroxide composite material applied to supercapacitor and preparation method of nickel selenide/nickel hydroxide composite material
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  • Nickel selenide/nickel hydroxide composite material applied to supercapacitor and preparation method of nickel selenide/nickel hydroxide composite material

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Embodiment 1

[0027] (1) Octahedral bulk NiSe 2 Preparation: Weigh 0.5mmol (0.1454g) nickel nitrate hexahydrate and dissolve it in 10ml deionized water to obtain solution A, ultrasonicate for 30 minutes, weigh 3mmol (0.2369g) selenium powder and 10ml hydrazine hydrate, stir for 30 minutes to obtain solution B , Pour solution A into solution B and stir for 30 minutes to obtain a mixed solution, pour the mixed solution into a 50ml polytetrafluoroethylene reactor, react at 120°C for 12 hours to obtain a black product, and use deionized water and absolute ethanol several times Wash, place in a blast drying oven, and dry at 60°C to obtain octahedral NiSe 2 Precursor.

[0028] (2)NiSe 2 / Ni(OH) 2 Preparation of composite material: weigh 100mg NiSe 2 The precursor was dispersed in 20ml of 0.1M / L KOH solution, dispersed evenly by ultrasonication for 5 minutes, then 1ml of 30% hydrogen peroxide was added, and stirred evenly. Pour the above mixed solution into a 50ml polytetrafluoroethylene reac...

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Abstract

The invention introduces a nickel selenide / nickel hydroxide composite material applied to a supercapacitor and a preparation method of the nickel selenide / nickel hydroxide composite material, and belongs to the technical field of a new energy material. Inorganic nickel salt and hydrazine hydrate are used, a nickel selenide precursor is obtained by hydrothermal reaction under a condition of an aqueous solution, and a composite material of nickel selenide and nickel hydroxide is further obtained by hydrogen peroxide. The strategy is opposite to a traditional strategy of preparing the composite material of metal oxide and hydroxide, and the obtained composite material fabricated by the method has excellent supercapacitor performance and has important guidance significance to fabrication of anelectrode material of the high-performance supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a nickel selenide / nickel hydroxide composite material applied to supercapacitors and a preparation method thereof Background technique [0002] Supercapacitors, also known as electrochemical capacitors, have the advantages of ultra-high power density, good cycle life, and fast charging, so they are expected to become one of the next generation of efficient and safe energy storage devices. Nevertheless, its relatively low energy density still limits its practical commercial applications. Therefore, it is critical to design and synthesize electrode materials with excellent electrochemical performance. [0003] Transition metal hydroxides are considered as one of the promising electrode materials due to their high specific surface area and theoretical capacity (3500-4600F / g). Taking nickel hydroxide as an example, it exhibits a higher theoretical capacity than me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCY02E60/13
Inventor 梅豪徐奔张世钰张昊兵杨振东孙道峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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