Conductive binding agent and lithium ion battery

A technology of conductive adhesives and lithium-ion batteries, applied in adhesives, secondary batteries, battery electrodes, etc., can solve the problems of not having charge and discharge characteristics, binders that do not have electrical conductivity, and only have physical bonding properties, etc. , to achieve the effect of increasing the specific capacity

Inactive Publication Date: 2015-08-26
DONGGUAN CHUANGMING BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Only have physical bonding properties;
[0005] 2. It is only used as a bonding component and does not have charge and discharge characteristics;
[0007] 4. The binder itself does not have conductive properties, and additional conductive additives need to be added

Method used

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  • Conductive binding agent and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Using p-phenylene ethylene or p-phenylene acetylene as raw materials, adding dodecylbenzene sulfonic acid to the raw materials, by adding initiators (sodium thiosulfate, etc.), under heating conditions, polymerization reaction occurs to generate electrical conductivity Conjugated polymer polyparaphenylene vinylene or polyparaphenylene vinylene.

[0028] 2. Using nitrogen methyl pyrrolidone (NMP) as a solvent, adding PVDF dry powder and conductive conjugated polymer poly(p-styrene or poly-p-phenylene vinylene), where PVDF and conductive conjugated polymer are used as binders The weight ratio is 0.5% and 0.5% respectively, and it is formulated into 4-8wt% conductive adhesive glue;

[0029] Add 1.8-3 times the weight of the positive electrode active material to the conductive adhesive glue solution and mix for 120 minutes to prepare a slurry with a solid content of 65-75%;

[0030] The pole pieces are made by transfer coating or extrusion coating, cut, wound, and then assembl...

Embodiment 2

[0032] 1. Using p-phenylene ethylene or p-phenylene acetylene as raw materials, adding dodecylbenzene sulfonic acid to the raw materials, by adding initiators (sodium thiosulfate, etc.), under heating conditions, polymerization reaction occurs to generate electrical conductivity Conjugated polymer polyparaphenylene vinylene or polyparaphenylene vinylene.

[0033] 2. Using nitrogen methyl pyrrolidone (NMP) as a solvent, adding PVDF dry powder and conductive conjugated polymer poly(p-styrene or poly-p-phenylene vinylene), where PVDF and conductive conjugated polymer are used as binders The weight ratios are respectively 0.5% and 1.5%, which are formulated into 4-8wt% conductive adhesive glue;

[0034] Add the positive electrode active material of 1.8-3 times the weight of the conductive binder to the conductive adhesive glue and mix for 240 minutes to prepare a slurry with a solid content of 65-75%;

[0035] The pole pieces are made by transfer coating or extrusion coating, cut, wound...

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PUM

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Abstract

The invention provides a conductive binding agent and a lithium ion battery. The conductive binding agent comprise, by weight, 0.5-5% of a conventional binding agent, 0.5-5% of a conductive conjugated polymer, 0.001-2% of a dopant and 89-98% of an organic solvent. According to the invention, the conductive binding agent for lithium ion batteries is prepared with a mature conductive polymer system. The conductive binding agent has adhesiveness and also electronic conductivity. With the redox properties of the conductive binding agent, the binding function can be performed, and the conducting function can be performed between the positive and negative electrodes of the lithium ion battery. Therefore, the dose of a traditional conductive additive can be reduced, and lithium ion battery specific capacity can be improved.

Description

Technical field [0001] The invention belongs to the field of new energy lithium batteries, and particularly relates to a conductive adhesive and a lithium ion battery. Background technique [0002] With the popularity of mobile Internet devices such as smartphones and laptops, the promotion of electric vehicles such as electric bicycles and electric motorcycles, and the development of aerospace technologies such as drones and space probes, the performance of lithium-ion batteries is facing higher The development requirements of high-performance lithium-ion batteries, while small size and high energy density have become the research direction of high-performance lithium-ion batteries. [0003] Because high-energy lithium-ion batteries are very important in important strategic areas such as advanced information processing terminals, equipment, and electric vehicles, they have attracted much attention. Although the energy density of commercially available lithium-ion batteries has rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J127/16C09J127/18C09J165/00C09J11/06C08G61/02H01M4/62H01M10/0525
CPCY02E60/10
Inventor 赵悠曼程建良
Owner DONGGUAN CHUANGMING BATTERY TECH
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