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Composite materials for paper electrodes and paper electrodes and paper batteries made of them

A paper battery and cathode active material technology, applied in the field of battery materials, can solve the problems of insignificant improvement of electrode conductivity, inability to give full play to the superiority of nano-carbon materials, and no consideration of the influence of conductivity, so as to improve mechanical strength and chemical stability. Stability, improvement of coating effect, and effect of increasing service life

Active Publication Date: 2020-05-22
山东圣泉新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, patent applications such as CN103966907A, CN102619128B, and CN102169999B have all studied the application of nano-carbon materials in paper batteries or paper electrodes. The electrode active material does not consider the effect of the mixing effect of carbon nanomaterials and pulp on the electrical conductivity of paper batteries, resulting in an insignificant improvement in the electrical conductivity of the electrode, and the inability to give full play to the superiority of carbon nanomaterials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A paper battery:

[0049] Nano cellulose is used as raw material to prepare fiber pulp, and then fiber paper is obtained as diaphragm paper through a papermaking process.

[0050] The biomass graphene, carbon nanotubes and lithium iron phosphate were dispersed in ethanol at a ratio of 2:1:7, and 0.5% of the polymer dispersant-polyvinylpyrrolidone was added to the above mixture to make the solution solid The content reaches 10% and no sedimentation occurs, and then after sufficient stirring and drying, the carbon material can uniformly coat the lithium iron phosphate particles. The dried composite positive electrode material is mixed with fiber pulp and polyvinyl alcohol according to 4:5:1 and paper is made to obtain graphene / active material composite positive electrode paper.

[0051] The biomass graphene, carbon nanotubes, fiber pulp, and polyvinyl alcohol are mixed in a ratio of 1:3:5:1 and made into paper to obtain carbon material composite negative electrode paper.

[0052...

Embodiment 2

[0054] A paper battery:

[0055] Nano cellulose is used as raw material to prepare fiber pulp, and then fiber paper is obtained as diaphragm paper through a papermaking process.

[0056] The biomass graphene, carbon nanotubes and lithium iron phosphate were dispersed in ethanol at a ratio of 2:1:7, and 0.5% of the polymer dispersant-polyvinylpyrrolidone was added to the mixture to make the solution solid. The content reaches 10% and no sedimentation occurs, and then after sufficient stirring and drying, the carbon material can uniformly coat the lithium iron phosphate particles. The dried composite positive electrode material is mixed with fiber pulp and polyvinyl alcohol according to 4:5:1 and paper is made to obtain graphene / active material composite positive electrode paper.

[0057] The biomass graphene, carbon nanotubes, fiber pulp, and polyvinyl alcohol are mixed in a ratio of 2:8:75:15 and paper is made to obtain a carbon material composite negative electrode paper.

[0058] A...

Embodiment 3

[0060] A paper battery:

[0061] Nano cellulose is used as raw material to prepare fiber pulp, and then fiber paper is obtained as diaphragm paper through a papermaking process.

[0062] The biomass graphene, carbon nanotubes and lithium iron phosphate were dispersed in ethanol at a ratio of 2:1:7, and 0.5% of the polymer dispersant-polyvinylpyrrolidone was added to the mixture to make the solution solid. The content reaches 10% and no sedimentation occurs, and then after sufficient stirring and drying, the carbon material can uniformly coat the lithium iron phosphate particles. The dried composite positive electrode material is mixed with fiber pulp and polyvinyl alcohol according to 4:5:1 and paper is made to obtain graphene / active material composite positive electrode paper.

[0063] The biomass graphene, carbon nanotubes, fiber pulp, and polyvinyl alcohol are mixed in a ratio of 2:3:4:1 and made into paper to obtain a carbon material composite negative electrode paper.

[0064] A...

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PUM

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Abstract

The invention provides a coating material used for a paper electrode, the paper electrode produced by the coating material, and a paper battery. A graphene conducting paper is prepared by a carbon material, a paper pulp and an auxiliary agent with mass ratio of 5-10: 34-57: 6-9; wherein the nano carbon material at least comprises graphene, and the auxiliary agent is one or more selected from modified starch, anionic polyacrylamide, polyvinyl alcohol and carboxymethyl cellulose. The coating material used in the field of the paper battery has the advantages of increasing specific capacity, increasing stable battery performance, and increasing the battery life.

Description

Technical field [0001] The present invention relates to the field of battery materials, in particular, to a composite material used for paper electrodes and paper electrodes and paper batteries made thereof. Background technique [0002] The weight, inflexibility, capacity, life and other issues of the battery have always hindered the further portability of electronic products. Paper batteries help reduce the weight of electronic products, extend product life, and give the battery a certain degree of flexibility, which can promote each other with flexible and portable electronic products. [0003] The use of mature paper technology and the use of conductive paper as current collectors and electrodes provide a low-cost, light-weight and efficient energy storage idea. At present, only the United States, Israel, Finland, Sweden and other countries in the world have achieved certain research and development results in this field. Paper batteries are mainly based on fiber paper as a c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/62H01M4/131H01M4/136H01M10/052H01M10/0563
CPCH01M4/131H01M4/136H01M4/362H01M4/62H01M10/052H01M10/0563H01M2220/30H01M2300/002Y02E60/10
Inventor 张金柱袁征刘顶
Owner 山东圣泉新能源科技有限公司
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