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Nickel-cobalt sulpho-spinel for super capacitor and preparation method of nickel-cobalt sulpho-spinel

A cobalt thiospinel, supercapacitor technology, applied in the field of materials, can solve the problems of limited electrochemical performance, poor high current charge and discharge rate characteristics, etc.

Inactive Publication Date: 2015-05-06
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the charging and discharging process, pseudocapacitive electrode materials are limited by the ion orientation and charge migration rate of the electrolyte, and their rate characteristics of high current charging and discharging are poor, which limits the further improvement of their electrochemical performance.

Method used

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  • Nickel-cobalt sulpho-spinel for super capacitor and preparation method of nickel-cobalt sulpho-spinel
  • Nickel-cobalt sulpho-spinel for super capacitor and preparation method of nickel-cobalt sulpho-spinel
  • Nickel-cobalt sulpho-spinel for super capacitor and preparation method of nickel-cobalt sulpho-spinel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Synthesize about 0.4g of NiCo 2 S 4 The precursors of the three elements, nickel acetate, cobalt acetate and penicillamine, need to be weighed separately, while controlling the stoichiometric ratio Co:Ni:S=1:2:5. Place the weighed nickel acetate, cobalt acetate and penicillamine in the hydrothermal reaction kettle, and add 25mL deionized water to the hydrothermal reaction kettle, then add acetic acid to adjust the pH value in the hydrothermal reaction kettle to 5.5, stir After 30 minutes, the components were mixed uniformly to obtain the first mixture. Then put the hydrothermal reaction kettle in the electric furnace and react at 130°C for 45h to obtain the primary product. The initial product was collected by centrifugation, washed with deionized water and absolute ethanol several times, then dried in a vacuum oven at 50°C for 12 hours, and finally sintered at 250°C for 3 hours in a nitrogen atmosphere.

[0038] The preparation method of the supercapacitor: the prep...

Embodiment 2

[0045] According to the steps described in Example 1, nickel acetate and cobalt acetate are used as the nickel source and the sulfur source, and penicillamine is the sulfur source. The chemical element stoichiometric ratio of Ni, Co, and S is 1:2:5, and the solvent type, pH value (type of inorganic acid), solvothermal temperature and solvothermal time, under the premise that other conditions remain unchanged, the obtained supercapacitor electrode performance is shown in Table 2 below.

[0046] Table 2 Determination results under different solvents, pH value, solvothermal temperature and solvothermal time

[0047]

Embodiment 3

[0049] According to the steps and components described in Example 1, the drying / calcination mode, temperature and time of the hydrothermal product were changed respectively, and under the premise that other conditions remained unchanged, the performance of the obtained supercapacitor electrode was tested, and the test results were as follows Table 3 shows.

[0050] Table 3 Determination results under different drying and calcination conditions

[0051]

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Abstract

The invention discloses a nickel-cobalt sulpho-spinel for super capacitor and a preparation method of the nickel-cobalt sulpho-spinel and aims to further improve the pseudocapacitance feature of nickel-cobalt metal compound composite material and increase the specific discharge capacity and cycling stability of the nickel-cobalt metal compound composite material. The preparation method includes: nickel salt, cobalt salt and penicillamine are used as raw materials, a solvent-thermal method is used, precursor nickel salt, cobalt salt and penicillamine proportion, solvent varieties, solvent-thermal temperature / time, pH values and the varieties of used inorganic acids are controlled, and subsequent procedures of centrifuging / washing / drying / roasting and the like are performed to obtain the nickel-cobalt sulpho-spinel nano material. Tests show that when the nickel-cobalt sulpho-spinel nano material is used as electrode material to produce a super capacitor, high specific discharge capacity and cycling stability are achieved. In addition, the preparation method is low in reaction temperature, controllable in reaction, capable of satisfying the requirements of industrial production, suitable for large-batch production and promising in development prospect.

Description

technical field [0001] The invention relates to the field of materials, in particular to the technical field of supercapacitors, in particular to a nickel-cobalt sulfide spinel for supercapacitors and a preparation method thereof. The nano-nickel-cobalt sulfide spinel material of the present invention is expected to improve the reversible specific capacity and cycle stability of supercapacitors, which is of great significance for the development of supercapacitors. Background technique [0002] Supercapacitors have the advantages of high power density, high energy density, fast charge and discharge rate, high efficiency, long cycle life, green electrode materials and wide operating temperature range, etc., and are currently a research hotspot. It has huge market potential in the fields of information technology, mobile communication, electric vehicles, hybrid fuel vehicles, aerospace and defense technology. [0003] According to different charge storage mechanisms, supercap...

Claims

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Application Information

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IPC IPC(8): H01G11/30
CPCY02E60/13H01G11/30B82Y30/00H01G11/86
Inventor 赵晓冲杨盼杨丽军王劲川杨锁龙
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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