Flexible core-shell heterostructure positive electrode material and preparation method and application thereof

A technology of heterostructure, cathode material, applied in nanotechnology for materials and surface science, chemical instruments and methods, hybrid capacitor electrodes, etc., can solve the problems of low specific capacity of supercapacitor electrode materials and achieve large specific surface area Effect

Active Publication Date: 2020-09-29
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a flexible core-shell heterostructure positive electrode material, which solves the technical problem of low specific capacity of the current supercapacitor electrode material

Method used

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  • Flexible core-shell heterostructure positive electrode material and preparation method and application thereof
  • Flexible core-shell heterostructure positive electrode material and preparation method and application thereof
  • Flexible core-shell heterostructure positive electrode material and preparation method and application thereof

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preparation example Construction

[0043] On the other hand, an embodiment of the present invention also provides a method for preparing the above-mentioned flexible electrode material, including the following steps:

[0044] S1, carbon cloth cleaning;

[0045] S2, prepare Co(CO 3 ) 0.35 Cl 0.2 (OH) 1.1 1.74H 2 O / CC: Fill the cleaned carbon cloth into 30mL containing CoCl 2 ·6H 2 O and urea were reacted in a high-pressure reactor with deionized water. After the reactor was naturally cooled to room temperature, the pink product was washed with deionized water and ethanol several times, dried in vacuum at 50°C for 12 hours, and then used after cooling;

[0046] S3, preparation of Co 9 S 8 / CC: Co(CO 3 ) 0.35 Cl 0.2 (OH) 1.1 1.74H 2 O / CC into 30mL containing Na 2 The reaction was carried out in a high-pressure reactor of the S solution, and after the reactor was naturally cooled to room temperature, the product was washed several times with deionized water and ethanol, dried in vacuum at 50°C for 12 ...

Embodiment 1

[0059] (1)Co(CO 3 ) 0.35 Cl 0.2 (OH) 1.1 1.74H 2 Preparation of O / CC samples: first place the carbon cloth (2cm×3cm) into acetone, hydrochloric acid (3M), absolute ethanol and deionized water, respectively, and sonicate each for 15min in turn. Then put the cleaned carbon cloth into 30mL containing 75mM CoCl 2 ·6H 2 O and 0.5mM urea deionized water in a high-pressure reactor, hydrothermal reaction at 90 ° C for 6 h, after the reactor was naturally cooled to room temperature, the pink product was washed several times with deionized water and ethanol, and vacuum-dried at 50 ° C for 12 h , to be used after cooling;

[0060] (2)Co 9 S 8 / CC sample preparation: Co(CO 3 ) 0.35 Cl 0.2 (OH) 1.1 1.74H 2 O / CC samples were put into 30mL containing 0.5M Na 2 In the high-pressure reaction kettle of S solution, hydrothermal reaction was carried out at 150°C for 10 hours. After the reaction kettle was naturally cooled to room temperature, the product was washed several times wit...

Embodiment 2

[0063] (1)Co(CO 3 ) 0.35 Cl 0.2 (OH) 1.1 1.74H 2 Preparation of O / CC samples: first place the carbon cloth (2cm×3cm) into acetone, hydrochloric acid (3M), absolute ethanol and deionized water, respectively, and sonicate each for 15min in turn. Then put the cleaned carbon cloth into 30mL containing 75mM CoCl 2 ·6H 2 O and 0.5mM urea deionized water in a high-pressure reactor, hydrothermal reaction at 90 ° C for 6 h, after the reactor was naturally cooled to room temperature, the pink product was washed several times with deionized water and ethanol, and vacuum-dried at 50 ° C for 12 h , to be used after cooling;

[0064] (2)Co 9 S 8 / CC sample preparation: Co(CO 3 ) 0.35 Cl 0.2 (OH) 1.1 1.74H 2 O / CC samples were put into 30mL containing 0.5M Na 2 In the high-pressure reaction kettle of S solution, hydrothermal reaction was carried out at 150°C for 10 hours. After the reaction kettle was naturally cooled to room temperature, the product was washed several times wit...

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Abstract

The invention belongs to the field of supercapacitors, and relates to a flexible core-shell heterostructure positive electrode material. The flexible core-shell heterostructure positive electrode material comprises a Co9S8 hollow nanorod array and NiMn bimetal oxide nanosheets, the Co9S8 hollow nanorod array and the NiMn bimetal oxide nanosheets uniformly grow on a carbon cloth flexible substrate,and the NiMn bimetal oxide nanosheets uniformly coat the outer surfaces of Co9S8 hollow nanorods. According to the flexible core-shell heterostructure positive electrode material, the hollow nanorodsdirectly grow on the carbon cloth in a vertical form; the nanosheets are mutually cross-linked and coated on the surfaces of the nanorods; specific surface area of material is large, the active sitesare exposed sufficiently, the gaps of the regularly arranged nano array provide sufficient channels and spaces for electrochemical reaction between the electrolyte and the active substance; the problem of low specific capacity of the current supercapacitor is solved, and the prepared flexible electrode is of a core-shell heterostructure and has the advantages of the excellent electrochemical performance, rich resources, the simple process, low production cost and the like.

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and in particular relates to a flexible core-shell heterostructure positive electrode material and a preparation method and application thereof. Background technique [0002] With the rapid development of human society, the severe energy crisis caused by the increasing depletion of fossil fuels and the increasing pollution of the environment has become an urgent problem to be solved. Considering this, it is imminent to find green renewable energy resources and explore efficient energy storage and conversion devices. As one of many energy storage devices, supercapacitors have attracted extensive attention due to their high power density, good cycle life, short charging time, environmental protection and safety performance. According to the charge storage mechanism, supercapacitors can be divided into two categories: the first category is an electric double layer capacitor that st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/32C01G51/00C01G53/00C01G53/04C01G45/02B82Y30/00B82Y40/00
CPCH01G11/24H01G11/30H01G11/46H01G11/32C01G51/30C01G53/04C01G53/00C01G45/02B82Y30/00B82Y40/00C01P2004/80C01P2004/16C01P2004/20C01P2004/64C01P2004/62C01P2004/50C01P2002/72C01P2004/03C01P2004/04C01P2006/40Y02E60/13Y02E60/10
Inventor 张惠刘梦洁李士阔黄方志王磊张浩
Owner ANHUI UNIVERSITY
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