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Pole piece, preparation method thereof, and battery comprising pole piece

A pole piece and battery technology, applied in the field of pole piece and its preparation, can solve problems such as fire, improve safety, improve production efficiency, and solve the effect of pole piece fire

Inactive Publication Date: 2021-02-12
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of the safety risk of fire during the baking process of pole piece production due to the addition of alcohol granulation film in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of preparation of lithium-manganese dioxide cylindrical battery:

[0038] (1) 90wt% MnO 2 Fully mix with 4.8wt% conductive carbon black, then fully mix with 4.8wt% polytetrafluoroethylene binder, add 0.4wt% TMN-6, fully stir to obtain mixed powder;

[0039] (2) molding the mixed powder in sequence, baking in an oven at a temperature of 150° C., drying at 180° C. for 24 hours, and cutting to obtain the battery positive pole piece;

[0040] (3) The battery positive electrode and negative electrode lithium sheet, diaphragm and electrolyte (1mol / L lithium perchlorate ethylene glycol dimethyl ether and propylene carbonate mixed solution, ethylene glycol dimethyl ether and propylene carbonate volume The ratio is 1:1) to assemble into a battery to obtain a lithium-manganese dioxide battery.

Embodiment 2

[0042] The difference with Example 1 is that step (1): 90wt% MnO 2 Fully mix with 4.9wt% conductive carbon black, then fully mix with 4.9wt% polytetrafluoroethylene binder, add 0.2wt% TMN-6, and fully stir to obtain mixed powder.

Embodiment 3

[0044] The difference with Example 1 is that step (1): 90wt% MnO 2 Fully mix with 4.7wt% conductive carbon black, then fully mix with 4.8wt% polytetrafluoroethylene binder, add 0.5wt% TMN-6, fully stir to obtain mixed powder.

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Abstract

The invention relates to a pole piece, a preparation method thereof, and a battery comprising the pole piece. When the pole piece is prepared, mixed powder containing electrode powder, a binder and anadditive is baked; and the additive has hydrophilic and lipophilic functional groups. The specific additive is adopted to replace flammable and combustible alcohol, so that the problem that the polepiece is on fire in the high-temperature baking process is thoroughly solved, the safety of the pole piece baking process is effectively improved, continuous production is facilitated, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a pole piece, a preparation method thereof and a battery including the pole piece. Background technique [0002] As a new generation of clean energy, lithium batteries have the advantages of high output voltage, high energy density, small self-discharge, long cycle life, no memory effect, fast charging and discharging, and environmental protection, and are widely used in various fields. After nearly two decades of development, the lithium-ion battery industry chain has formed an industrial chain system with a high degree of specialization and a clear division of labor. [0003] At present, in the process of forming lithium battery pole pieces, alcohol is usually added to the electrode powder to granulate and form a film. However, the safety of alcohol is low, and there is a safety risk of fire during the high-temperature baking process. Therefore, in actual industri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/052H01M10/42
CPCH01M4/62H01M10/052H01M10/4235Y02E60/10
Inventor 朱亮刘建华刘金成
Owner EVE ENERGY CO LTD
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