Composite negative electrode material for zinc-based secondary battery and preparation method thereof, 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 the problems of low capacity and poor rate performance of calcium zincate materials, and achieve improved rate performance. , long cycle life, good rate performance

Active Publication Date: 2021-11-16
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 composite negative electrode material for a zinc-based secondary battery, a preparation method thereof, and a zinc-based secondary battery to solve the problems of low capacity and poor rate performance of calcium zincate materials prepared in the prior art

Method used

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  • Composite negative electrode material for zinc-based secondary battery and preparation method thereof, zinc-based secondary battery
  • Composite negative electrode material for zinc-based secondary battery and preparation method thereof, zinc-based secondary battery
  • Composite negative electrode material for zinc-based secondary battery and preparation method thereof, zinc-based secondary battery

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Embodiment 1

[0036] The preparation method of the zinc-based secondary battery composite negative electrode material of the present embodiment comprises the following steps:

[0037] 1) Mix alkylphenol polyoxyethylene ether-10 (octylphenol polyoxyethylene ether, OP-10), n-octanol, and n-heptane at a volume ratio of 4.5:5:12 to prepare a transparent solution, and then put the The transparent solution is divided into three equal parts, namely the first transparent solution, the second transparent solution, and the third transparent solution;

[0038] Dissolve KOH in deionized water to prepare an alkali solution with a molar concentration of 2mol / L;

[0039] ZnCl 2 Dissolve in deionized water to prepare a zinc salt solution with a molar concentration of 1mol / L; add CaCl 2 Dissolved in deionized water to prepare a calcium salt solution with a molar concentration of 1mol / L; ZnCl 2 with CaCl 2 The molar ratio is 2:1;

[0040] Add the first transparent solution dropwise to the above alkali s...

Embodiment 2

[0052] The preparation method of the zinc-based secondary battery composite negative electrode material of the present embodiment comprises the following steps:

[0053] 1) Mix CTAB, n-butanol and n-heptane at a volume ratio of 5:4.5:14 to prepare a transparent solution, and then divide the transparent solution into three parts, namely the first transparent solution, the second transparent solution, and the third transparent solution. clear solution;

[0054] Dissolve NaOH in deionized water to prepare an alkali solution with a molar concentration of 4mol / L;

[0055] Zn(NO 3 ) 2 Dissolved in deionized water, prepared into a zinc salt solution with a molar concentration of 2mol / L; the Ca(NO 3 ) 2 Dissolved in deionized water, prepared into a calcium salt solution with a molar concentration of 2mol / L; Zn(NO 3 ) 2 and Ca(NO 3 ) 2 The molar ratio is 2:1;

[0056] Add the first transparent solution dropwise to the above alkaline solution, the volume ratio of the first tran...

Embodiment 3

[0065] The preparation method of the zinc-based secondary battery composite negative electrode material of the present embodiment comprises the following steps:

[0066] 1) Mix nonylphenol polyoxyethylene ether, isopropanol and cyclohexane at a volume ratio of 6:8:15 to prepare a transparent solution, and then divide the transparent solution into three parts, namely the first transparent solution, the second transparent solution, and the second transparent solution. Second transparent solution, third transparent solution;

[0067] Dissolve LiOH in deionized water to prepare an alkali solution with a molar concentration of 6mol / L;

[0068] ZnCl 2 Dissolved in deionized water, prepared into a zinc salt solution with a molar concentration of 3mol / L; the Ca(NO 3 ) 2 Dissolved in deionized water, prepared into a calcium salt solution with a molar concentration of 3mol / L; ZnCl 2 and Ca(NO 3 ) 2 The molar ratio is 2:1;

[0069] The first transparent solution was added dropwise...

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Abstract

The invention relates to a composite 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. The composite negative electrode material for zinc-based secondary batteries of the present invention is composed of calcium zincate nanosheets, nano-bismuth oxides, and carbon materials; the thickness of the calcium zincate nanosheets is 10-100nm; the nano-bismuth The oxide molecular formula is Bi 2 o 2.75 , the carbon material is graphene, carbon nanotubes, acetylene black, C 3 N 4 one or a combination of the two. The composite negative electrode material of the invention has long cycle life and good rate performance.

Description

technical field [0001] The invention relates to a composite 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] The current society has higher and higher requirements for the development of green energy. Due to its pollution to the environment, nickel-cadmium batteries have gradually withdrawn from the traditional application field. Therefore, it is very necessary to find a new type of battery to replace nickel-cadmium batteries. As a substitute for nickel-cadmium batteries, nickel-hydrogen batteries were once sought after by people because of their environmental protection, but the severe self-discharge and high cost of nickel-hydrogen batteries limit their development space. [0003] Zinc-nickel secondary battery is a new type of water-based secondary battery. It has the advantages of high specific energy (about 80Wh / g),...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/30B82Y30/00
CPCB82Y30/00H01M4/362H01M4/48H01M4/625H01M4/628H01M10/30H01M2004/021H01M2004/027Y02E60/10
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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