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Ion and electron composite conduction electrode and in-situ preparation method thereof

An electronic composite, in-situ preparation technology, applied in battery electrodes, hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc. It can meet the problems of large-scale preparation, and achieve the effect of simple method, cancellation of post-processing steps, and improved dispersibility.

Pending Publication Date: 2022-04-22
浙江浙能中科储能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these achievements have comprehensively designed ionic conductivity and electronic conductivity from the perspective of materials and structures.
Moreover, most of the methods reported above are poorly compatible with large-scale production methods, and surface-coated materials are difficult to process, which cannot meet the requirements of large-scale preparation

Method used

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  • Ion and electron composite conduction electrode and in-situ preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First, add 3kg of brass powder and 10kg of zirconia grinding balls into the agate ball mill jar. Next, continue to add 1 kg of nano-hydroxyapatite suspension with a solid content of 50%. Place the ball mill jar with the powder on a planetary ball mill for ball milling and dispersion for 1 hour. During this process, the metal zinc component in the brass powder and water slowly undergo a hydrogen evolution reaction, and the Zn is slowly released from the surface. 2+ . Produced Zn 2+ instead of Ca 2+ , and in-situ cation exchange with hydroxyapatite near the surface of metal zinc to generate zinc-hydroxyapatite, a compound with cation conductivity. Compared with adding zinc-hydroxyapatite powder directly, the zinc-hydroxyapatite generated in this way can not only achieve more uniform dispersion, but also avoid the step of ion exchange by soaking in zinc-containing solution , saving process and cost.

[0032] After the ball mill tank was cooled, 1.25 kg of polyethylen...

Embodiment 2

[0035] First, add 3.5kg of zinc powder and 10kg of zirconia grinding balls into the agate ball mill jar. Then, continue to add 1.5 kg of sodium dihydrogen phosphate solution with a solid content of 30%. Put the ball mill jar with the powder on a swing ball mill for ball milling and disperse for 1 hour. During this process, zinc powder and water slowly undergo hydrogen evolution reaction, and Zn is slowly released from the surface. 2+ , and release OH in situ - . Produced Zn 2+ in OH - With the aid of, instead of Na + , with H 2 PO 4 - Combine on the surface of metal zinc to generate Zn in situ 3 (PO 4 ) 2 This ionically conductive compound. Zn produced in this way 3 (PO 4 ) 2 , compared to the direct addition of Zn 3 (PO 4 ) 2 Powder can achieve uniform dispersion on the molecular scale.

[0036] After the ball mill tank was cooled, 1 kg of sodium polyacrylate (15% solid content) and polyvinylpyrrolidone (15% solid content) solutions were added respectively,...

Embodiment 3

[0039] First, add 4kg of lead powder and 10kg of zirconia grinding balls to the agate ball mill jar. Next, continue to add the mixed solution of disodium hydrogen phosphate (solid content is 5%) and bismuth ammonium citrate (solid content is 5%) of 2kg. Place the ball mill jar with the powder on a horizontal ball mill for ball milling and disperse for 1 hour. During this process, lead powder and water slowly undergo hydrogen evolution reaction, and Pb is slowly released from the surface. 2+ , and release OH in situ - . Produced Pb 2+ in OH - With the aid of, instead of Na + , with HPO 4 2- Combine on the surface of metallic lead to generate Pb in situ 3 (PO 4 ) 2 This ionically conductive compound. At the same time, lead can undergo a spontaneous in-situ electrodisplacement reaction with bismuth ammonium citrate, forming Bi metal particles on the surface of lead, and supplementing Pb 2+ The concentration of ions is conducive to the continued occurrence of ion excha...

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Abstract

The invention relates to an ion and electron composite conduction electrode and an in-situ preparation method thereof, and the method comprises the steps: adding an additive precursor A and an active substance B into a mixing device, mixing for a set time length, and stirring the mixture of the additive precursor A and the active substance B in the mixing device by a stirring device while mixing, the additive precursor A and the active substance B are subjected to in-situ ion exchange in the stirring process, so that a product with electrolyte cation conductivity can be generated and is uniformly dispersed. The preparation method has the beneficial effects that a three-dimensional conductive network constructed by zero-dimensional / one-dimensional / two-dimensional structural units is designed in a targeted manner through composite use of electronic conductive materials with different microtopographies. The material is low in cost, the method is simple and convenient, large-scale expanded production is easy, and the method is particularly suitable for electrode preparation of water-based ion batteries and water-based supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to an ion-electron composite conduction electrode and an in-situ preparation method thereof. Background technique [0002] With the development of the economy and the advancement of science and technology, today's society is increasingly dependent on energy. Electric energy, as a clean and convenient secondary energy source at the end of use, is highly praised and widely popularized by modern society. However, most of the current sources of electric energy are fossil fuels such as coal, oil, and natural gas, which not only have irreconcilable contradictions with the increasing social demand in terms of resource abundance, but also bring about serious problems such as environmental pollution and increased greenhouse effect. as a result of. In order to solve the disadvantages of fossil fuel power generation, renewable energy, such as solar energy, wind energy, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/22H01G11/24H01G11/32H01G11/86H01M4/02H01M4/62H01M4/64
CPCH01M4/02H01M4/625H01G11/24H01G11/32H01G11/22H01G11/86H01M4/64
Inventor 王世杰迟晓伟侯丽娟李卓斌沈建明张云启王宏杰张婧
Owner 浙江浙能中科储能科技有限公司
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