A self-supporting membrane electrode, battery and vehicle

A self-supporting film and electrode technology, applied in the direction of batteries, battery electrodes, secondary batteries, etc., can solve the problems of flexible control of thickness, high integration without modules, and continuous film formation of fragments, so as to improve battery energy density, The effect of reducing production energy consumption

Active Publication Date: 2022-03-08
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) High integration of the system without modules;
[0011] However, due to the different material shapes, hardness and density of active materials such as nickel-cobalt-manganese-lithium, lithium iron phosphate, carbon fiber, graphite and activated carbon, the binder itself has different molding states under the coupling of temperature and force field during the manufacturing process. , leading to the self-supporting membrane electrode process, there are fragments that cannot be continuously formed into a film, the thickness cannot be flexibly adjusted, and the surface density and porosity of the ion transport and electron conduction system can be reconstructed, as well as the self-supporting membrane binder, especially the self-supporting membrane. Therefore, it is necessary to develop a self-supporting membrane electrode with low energy consumption and adjustable

Method used

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  • A self-supporting membrane electrode, battery and vehicle
  • A self-supporting membrane electrode, battery and vehicle
  • A self-supporting membrane electrode, battery and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] This embodiment provides a kind of figure 1 The battery based on the self-supporting film electrode, the battery preparation step is as figure 2 As shown, the self-supporting film electrode is produced by the following method:

[0131] (1) Nickel-cobalt-manganese (lini) with 94% mass fraction 0.8 CO 0.1 Mn 0.1 O 2 Examples of the active substance, mixed with 2% graphite conductive agent, mixed with a 4% elongation of 300%, compression ratio 300, glass transition temperature of 130 ° C, melting point of 380 ° C, molecular weight of 4 million 4 FF atom polymer binders, mixed 2 h, forming a multi-component mixture having a binder invisible, and mixed 0.5 min in a mixture of 0.5 min in a solvent-free mixture. , Mixture scanning electron microscopy image 3 As shown, the powdered mixture is mixed 20 ° C for 20 min to form a granular coating; the obtained granular coating 120 ° C derived a continuous positive electrode self-support film having a thickness of 120 μm, such as Figure...

Embodiment 2

[0135] This embodiment provides a battery based on the self-supporting film electrode, the self-supporting film electrode to be produced by the following method:

[0136] (1) Quality fraction is 92% active material nickel-cobalt manganese (LINI) 0.5 CO 0.2 Mn 0.3 O 2 ) And 2% graphite conductive agent, mixed at 10 ° C for 1 h, adding 6% elongation of 300%, compression ratio 300, glass transition temperature of 130 ° C, melting point of 380 ° C, molecular weight of 4 million) 4 F fluoro Atomic polymer binder, -5 ° C mixing 1 h, a component mixture having an intangible adhesive invisible, and mixing the obtained multi-component mixture 95 ° C for 1 min to prepare a powdery mixture, powdered mixture 30 EtOAc EtOAc EtOAc m. Made from the positive electrode of the self-supporting film;

[0137] (2) The mass fraction is 97% active material graphite and 1.5% graphite conductive agent, mixed for 1 h at 30 ° C, and the 1.5% molecular segment repeating unit contains 1 nitr-based group, the ...

Embodiment 3

[0140] This embodiment provides a battery based on the self-supporting film electrode, the self-supporting film electrode to be produced by the following method:

[0141] (1) Quality fraction is 96% active material nickel-wateng-cobalt manganese (Lini) 0.6 CO 0.2 Mn 0.2 O 2 ) And 2% graphite conductive agent, mixed at 10 ° C for 1 h, adding 2% elongation of 300%, compression ratio 300, glass transition temperature of 130 ° C, melting point of 380 ° C, molecular weight of 4 million) 4 F fluoro Atomic polymer binder, -8 ° C mixing 1 h, a component mixture having an intangible binder invisible, and mixed 1min of the obtained multi-component mixture 85 ° C for 1 min to prepare a powdery mixture, powdered mixture 30 EtOAc EtOAc EtOAc m. Made from the positive electrode of the self-supporting film;

[0142] (2) The mass fraction is 97% active material graphite and 1.5% graphite conductive agent, mixed for 1 h at 30 ° C, and the 1.5% molecular segment repeating unit contains 1 nitr-based...

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Abstract

The invention discloses a self-supporting membrane electrode, a battery and a vehicle. The self-supporting membrane electrode improves the battery energy density of the existing material system while reducing production energy consumption, the thickness can be adjusted, and the reconstruction is suitable for ion transmission and electron conduction systems. The areal density and porosity, and the self-supporting membrane binder suitable for electrochemical stability, combined with the electrode structure characteristics of the self-supporting membrane, the failure monitoring and management of the self-supporting membrane electrode.

Description

Technical field [0001] The present invention belongs to the novel energy source technology, and more particularly to a self-supporting film electrode, a battery, and a vehicle. Background technique [0002] With the rapid development of electric vehicles, users have continuously improved the demand for renewal mileage, fast charging / charging, and the need. In order to meet the needs of users, they can pass, [0003] (1) High-specific capacity active materials; [0004] (2) High integration of system-free groups; [0005] (3) Electrochemical / mechanical / electrical / function safety design; [0006] (4) Measures such as material / manufacturing / recycling / pre-lithium promotion and other measures; [0007] (5) Business model such as fast power exchange; [0008] Existing coating electrodes and their battery manufacturing processes, for example, including pulp, coating, drying, roll pressure, pole / diaphragm, wound / laminate, housing, nicker, and package. The electrode comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/13H01M4/139H01M4/04H01M10/0525
CPCH01M4/13H01M4/139H01M4/0435H01M10/0525H01M2220/20Y02E60/10
Inventor 王德平荣常如孙焕丽张兴瑞卢青伟李子玉
Owner CHINA FIRST AUTOMOBILE
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