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Cobalt nickel sulfide-MXene electrode material for supercapacitor and preparation method of cobalt nickel sulfide-MXene electrode material

A supercapacitor, cobalt-nickel sulfide technology, applied in the direction of hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, etc., can solve problems such as poor conductivity, poor conductivity and cycle stability, and affect popularization and application, and achieve increased Effects of specific surface area, abundant electrochemical active sites, and high tolerance

Active Publication Date: 2021-12-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, cobalt-nickel sulfide materials have the limitation of poor conductivity due to the preparation process and other problems. Although the material can have a large specific capacitance, its conductivity and cycle stability are not good, which affects its further promotion and application.

Method used

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  • Cobalt nickel sulfide-MXene electrode material for supercapacitor and preparation method of cobalt nickel sulfide-MXene electrode material
  • Cobalt nickel sulfide-MXene electrode material for supercapacitor and preparation method of cobalt nickel sulfide-MXene electrode material
  • Cobalt nickel sulfide-MXene electrode material for supercapacitor and preparation method of cobalt nickel sulfide-MXene electrode material

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Effect test

Embodiment 1

[0030] A kind of preparation method for the cobalt nickel sulfide-MXene electrode material of supercapacitor, comprises the steps:

[0031] (1) Preparation of thin-layer MXene nanosheets:

[0032] Add metal fluoride salts to concentrated hydrochloric acid, stir to form a uniform mixed solution, and then add Ti 2 AlC 3 Place in the mixed solution, stir vigorously at 40°C for 24 hours, then wash and centrifuge separately with deionized water to obtain a black precipitate, centrifuge for 5 minutes each time, after centrifuging for 3 times, make the pH value of the solution greater than 6.0, collect the precipitate, dissolve it In 100mL water, under the atmosphere of argon protection, sonicate for 3h, centrifuge at 3500rpm for 1h, remove the supernatant, then wash and centrifuge with deionized water and absolute ethanol to obtain a black precipitate, and finally freeze-dry After 12h, the thin layer of MXene nanosheets was obtained for subsequent use;

[0033] (2) Preparation of...

Embodiment 2

[0045] A kind of preparation method for the cobalt nickel sulfide-MXene electrode material of supercapacitor, comprises the steps:

[0046] (1) Preparation of thin-layer MXene nanosheets:

[0047] Add metal fluoride salts to concentrated hydrochloric acid, stir to form a uniform mixed solution, and then add Ti 2 AlC 3 Place in the mixed solution, stir vigorously at 40°C for 24 hours, then wash and centrifuge separately with deionized water to obtain a black precipitate, centrifuge for 5 minutes each time, after centrifuging for 3 times, make the pH value of the solution greater than 6.0, collect the precipitate, dissolve it In 100mL water, under the atmosphere of argon protection, sonicate for 3h, centrifuge at 3500rpm for 1h, remove the supernatant, then wash and centrifuge with deionized water and absolute ethanol to obtain a black precipitate, and finally freeze-dry After 12h, the thin layer of MXene nanosheets was obtained for subsequent use;

[0048] (2) Preparation of...

Embodiment 3

[0060] A kind of preparation method for the cobalt nickel sulfide-MXene electrode material of supercapacitor, comprises the steps:

[0061] (1) Preparation of thin-layer MXene nanosheets:

[0062] Add metal fluoride salts to concentrated hydrochloric acid, stir to form a uniform mixed solution, and then add Ti 2 AlC 3 Place in the mixed solution, stir vigorously at 40°C for 24 hours, then wash and centrifuge separately with deionized water to obtain a black precipitate, centrifuge for 5 minutes each time, and collect the precipitate after centrifuging 4 times to make the pH value of the solution greater than 6.0, and dissolve it In 100mL water, under the atmosphere of argon protection, sonicate for 3h, centrifuge at 3500rpm for 1h, remove the supernatant, then wash and centrifuge with deionized water and absolute ethanol to obtain a black precipitate, and finally freeze-dry After 12h, the thin layer of MXene nanosheets was obtained for subsequent use;

[0063] (2) Preparati...

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Abstract

The invention discloses a preparation method of a cobalt nickel sulfide-MXene electrode material for a supercapacitor, and belongs to the technical field of capacitor electrode material preparation. The preparation method comprises the following steps: (1) preparation of a thin MXene nanosheet layer, (2) preparation of an MXene-MOF precursor material, and (3) preparation of a finished product electrode material. The invention provides the preparation method of the cobalt nickel sulfide-MXene electrode material for the supercapacitor, and the method overcomes the limitation of poor conductivity of the cobalt nickel sulfide, so that the conductivity and cycling stability of the cobalt nickel sulfide are greatly improved under the condition that the material has large specific capacitance.

Description

technical field [0001] The invention belongs to the technical field of capacitor electrode material preparation, and in particular relates to a cobalt nickel sulfide-MXene electrode material for supercapacitors and a preparation method thereof. Background technique [0002] As a typical transition metal sulfide, cobalt-nickel sulfide is widely used in the fields of electrocatalysis, solar cells and supercapacitors because of its easy preparation, environmental friendliness, non-toxicity and excellent optical, magnetic and electrochemical properties. It has received more and more attention and research enthusiasm. Compared with the binary metal sulfides (NiSx, CoSx), the ternary metal cobalt-nickel sulfide causes changes in the crystal structure due to the introduction of new metal atoms in the structure, thereby improving its optical, magnetic and electrochemical properties. . Therefore, compared with single metal sulfides, cobalt-nickel sulfide has higher conductivity, el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30
CPCH01G11/30H01G11/86H01G11/24Y02E60/13
Inventor 张昊兵梅豪李紫祎徐奔孙道峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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