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Calcium zincate negative electrode material for zinc-based secondary battery, preparation method of calcium zincate negative electrode material and zinc-based secondary battery

A technology for secondary batteries and negative electrode materials, applied in battery electrodes, nanotechnology for materials and surface science, negative electrodes, etc., can solve problems such as poor rate performance and cycle performance, and achieve high specific power and specific energy. , the effect of improving electrical conductivity

Active Publication Date: 2020-12-04
XINXIANG CHAOLI NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a calcium zincate negative electrode material for a zinc-based secondary battery, a preparation method thereof, and a zinc-based secondary battery to solve the problem of poor rate performance and cycle performance of calcium zincate materials in the prior art

Method used

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  • Calcium zincate negative electrode material for zinc-based secondary battery, preparation method of calcium zincate negative electrode material and zinc-based secondary battery
  • Calcium zincate negative electrode material for zinc-based secondary battery, preparation method of calcium zincate negative electrode material and zinc-based secondary battery
  • Calcium zincate negative electrode material for zinc-based secondary battery, preparation method of calcium zincate negative electrode material and zinc-based secondary battery

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Embodiment 1

[0035] The preparation method of the zinc-based secondary battery calcium zincate negative electrode material of the present embodiment comprises the following steps:

[0036] 1) ZnCl 2 and CaCl 2 Mix and add deionized water at a molar ratio of 2:1 to make it dissolve to make a salt solution with a total molar concentration of 1mol / L;

[0037] Dissolve KOH in deionized water to prepare an alkali solution with a molar concentration of 2mol / L;

[0038] A mixture of alkylphenol polyoxyethylene ether-10 (octylphenol polyoxyethylene ether, OP-10) and oleic acid at a volume ratio of 1:1, n-octanol and n-heptane at a volume ratio of 4.5 :5:12 mixed to make a transparent solution, and then add the transparent solution dropwise to the above alkali solution, the volume ratio of the transparent solution to the alkali solution is 3:10, after fully stirring, a white mixed solution is obtained.

[0039] 2) Add the salt solution prepared in step 1) dropwise into the white mixed solution, ...

Embodiment 2

[0048] The preparation method of the zinc-based secondary battery calcium zincate negative electrode material of the present embodiment comprises the following steps:

[0049] 1) Zn(NO 3 ) 2 and Ca(NO 3 ) 2 Mix and add deionized water at a molar ratio of 2:1 to make it dissolve to make a salt solution with a total molar concentration of 2mol / L;

[0050] Dissolve NaOH in deionized water to prepare an alkali solution with a molar concentration of 4mol / L;

[0051] Mix oleic acid, n-pentanol, and isooctane in a volume ratio of 8:7:25 to form a transparent solution, then add the transparent solution dropwise to the above alkali solution, and the volume ratio of the transparent solution to the alkali solution is 1:1 , after fully stirring, a white mixed solution was obtained.

[0052] 2) Add the salt solution obtained in step 1) dropwise into the white mixed solution, and react under continuous stirring for 72 hours at a temperature of 80°C; the molar ratio of Zn in the salt so...

Embodiment 3

[0058] The preparation method of the zinc-based secondary battery calcium zincate negative electrode material of the present embodiment comprises the following steps:

[0059] 1) Zn(CH 3 COO) 2 2H 2 O and Ca(CH 3 COO) 2 Mix and add deionized water at a molar ratio of 2:1 to make it dissolve to make a salt solution with a total molar concentration of 4mol / L;

[0060] Dissolve LiOH in deionized water to prepare an alkali solution with a molar concentration of 6mol / L;

[0061] Mix nonylphenol polyoxyethylene ether, mixed alcohol, and cyclohexane at a volume ratio of 5:6:20 to form a transparent solution, and then add the transparent solution dropwise to the above-mentioned alkali solution. The volume ratio of the transparent solution to the alkali solution The ratio was 16:15. After stirring well, a white mixed solution was obtained. The mixed alcohol is composed of n-hexanol and n-pentanol in a volume ratio of 2:1.

[0062] 2) Add the salt solution prepared in step 1) dro...

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Abstract

The invention relates to a calcium zincate negative electrode material for a zinc-based secondary battery, a preparation method of the calcium zincate negative electrode material and the zinc-based secondary battery, and belongs to the technical field of batteries. The calcium zincate negative electrode material for the zinc-based secondary battery includes spherical flower-like particles or flower-like particles, the spherical flower-like particles or the flower-like particles comprise calcium zincate nanosheet clusters, the calcium zincate nanosheet clusters comprise calcium zincate nanosheets, and the thickness of the calcium zincate nanosheets is 40-150 nm; and the particle size of the spherical flower-shaped particles or the flower-like particles is 4-50 microns. The calcium zincate negative electrode material for the zinc-based secondary battery has high rate capability and cycle performance.

Description

technical field [0001] The invention relates to a calcium zincate negative electrode material for a zinc-based secondary battery, a preparation method thereof, and a zinc-based secondary battery, belonging to the technical field of batteries. Background technique [0002] Zinc-nickel battery is an alkaline secondary battery with high energy density. Its battery performance is far superior to that of cadmium-nickel and nickel-metal hydride batteries. The battery has rich raw materials, non-toxic electrolyte and active materials, and the battery system is green and pollution-free. However, the active materials of conventional negative electrode materials in zinc-nickel batteries are easily soluble in alkaline electrolytes, resulting in zinc dendrites or electrode deformation, resulting in reduced battery cycle life. [0003] Calcium zincate is a negative electrode material for zinc-nickel batteries, which is formed by combining calcium hydroxide and zinc oxide. X-ray diffracti...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M10/30C01G9/00B82Y30/00
CPCB82Y30/00C01G9/00C01P2002/72C01P2004/03C01P2004/20C01P2004/30C01P2004/32C01P2004/61C01P2004/62C01P2004/64C01P2006/40H01M4/48H01M10/30H01M2004/021H01M2004/027Y02E60/10
Inventor 上官恩波李林倩王明煜徐松赵梁栋李亮生李鹏骆力荣
Owner XINXIANG CHAOLI NEW ENERGY
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