Preparation method of nickel-cobalt oxide@nickel-cobalt hydroxide core-shell structure electrode material

A technology of nickel-cobalt hydroxide and nickel-cobalt oxide, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, nanotechnology, etc., can solve the problems of harsh and complex preparation conditions, high risk, product agglomeration, etc. Achieve good repeatability, low cost, and avoid the use of binders

Pending Publication Date: 2021-09-21
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing nickel-cobalt oxide@nickel-cobalt hydroxide core-shell structure electrode material, which overcomes the harsh and complex preparation conditions and high cost of the prior art , high risk and serious product agglomeration, the prepared nickel-cobalt oxide@nickel-cobalt hydroxide composite material has broad application prospects in supercapacitors, air batteries and other fields

Method used

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  • Preparation method of nickel-cobalt oxide@nickel-cobalt hydroxide core-shell structure electrode material
  • Preparation method of nickel-cobalt oxide@nickel-cobalt hydroxide core-shell structure electrode material
  • Preparation method of nickel-cobalt oxide@nickel-cobalt hydroxide core-shell structure electrode material

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preparation example Construction

[0028] refer to Figure 1-3 , a preparation method of nickel-cobalt oxide@nickel-cobalt hydroxide core-shell structure electrode material, comprising the following steps: S1, the size is 2 × 3cm 2 The carbon is arranged in a certain concentration of dilute nitric acid for hydrothermal activation;

[0029] S2, dissolving nickel salt, cobalt salt and urea in deionized water, stirring magnetically at 360rpm / min for 30min to form a uniform and transparent dark red solution;

[0030] S3, transfer the transparent solution to the lining of the polytetrafluoroethylene reactor, and put a piece of activated carbon cloth upright;

[0031] S4. Seal the reaction kettle and heat it to a certain temperature to react for a period of time. After the reaction is completed and cooled to room temperature, take out the carbon cloth carrying the precursor and wash it repeatedly in deionized water and absolute ethanol for 2 to 3 times to obtain the precursor. ;

[0032] S5, drying the precursor o...

Embodiment 1

[0042] This example provides a preparation method for activating commercial carbon cloth to increase oxygen-containing functional groups. The specific steps are as follows:

[0043] 1) 6ml of concentrated nitric acid (concentration is 68%) is added dropwise into 30ml of deionized water, and stirred with a glass rod while adding;

[0044] 2) Pour the solution obtained in step (1) into the lining of a 50mL reactor, and place a piece of cleaned commercial carbon cloth (2×3cm 2 ), naturally cooled to room temperature after being kept at 120°C for 4 hours;

[0045] 3) The acidified carbon cloth obtained in step (2) was cross-washed 2 to 3 times with deionized water and absolute ethanol respectively, and the washed carbon was placed in a drying oven at 60°C for 6 hours to obtain activated carbon cloth. carbon cloth.

Embodiment 2

[0047] This embodiment provides the preparation of a nickel cobaltate nanowire / carbon cloth flexible electrode, and the specific steps are as follows:

[0048] 1) Dissolve 0.58g of nickel nitrate hexahydrate, 1.16g of cobalt nitrate hexahydrate and 0.60g of urea in 35ml of deionized water, and stir magnetically at 360rpm / min for 30min to form a uniform and transparent dark red solution;

[0049] 2) Transfer the transparent solution to the lining of a 50ml polytetrafluoroethylene reactor, and place a piece of activated carbon cloth (2×3cm 2 );

[0050] 3) Seal the reactor and heat it to 120°C and keep it warm for 6 hours. After the reaction is completed and cooled to room temperature, take out the carbon cloth carrying the precursor and wash it repeatedly in deionized water and absolute ethanol for 2 to 3 times to obtain the precursor;

[0051] 4) Dry the precursor obtained in step 3) in a 60°C drying oven for 12 hours;

[0052] 5) Put the precursor obtained in step 4) into a...

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Abstract

The invention discloses a preparation method of a nickel-cobalt oxide@nickel-cobalt hydroxide core-shell structure electrode material. The preparation method comprises the following steps of (1) placing carbon cloth with the size of 2*3 cm<2> in dilute nitric acid with a certain concentration for hydrothermal activation, (2) putting the activated carbon cloth into a solution filled with mixed metal salt and a precipitator, and carrying out hydrothermal reaction to obtain a precursor, (3) annealing the precursor in an air atmosphere to obtain a nickel-cobalt oxide nanowire array, and (4) finally, preparing the nickel-cobalt oxide@nickel-cobalt hydroxide core-shell electrode material by utilizing a constant potential deposition method. The problems of harsh and complicated preparation conditions, high cost, high risk and serious product agglomeration in the prior art are solved, and the nickel-cobalt oxide@nickel-cobalt hydroxide composite material is prepared on the flexible carbon cloth; wide application prospects are realized in the fields of supercapacitors, air batteries and the like.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a method for preparing an electrode material with a core-shell structure of nickel-cobalt oxide@nickel-cobalt hydroxide. Background technique [0002] In the past decade, with the continuous emergence of electronic devices in various fields (mobile, biomedical, consumer electronics, sports, clean energy and environment), flexible and wearable microelectronic devices and systems have become very important, flexible The commercialization of electronics brings new challenges to mature energy storage systems. For example, new energy storage devices need to maintain high-quality performance under long-term continuous mechanical deformations such as bending, folding, twisting, and stretching. Safety and cost should also be considered, especially for wearable and implantable devices. Therefore, we believe that the demand for flexible energy storage systems will increase si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/34H01G11/30H01G11/26H01G11/24B82Y40/00
CPCH01G11/86H01G11/34H01G11/30H01G11/26H01G11/24B82Y40/00Y02E60/13
Inventor 罗意李生娟姚远王聪李田成薛裕华
Owner UNIV OF SHANGHAI FOR SCI & TECH
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