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Preparation method of cylindrical mixed solid-liquid lithium ion battery

A lithium-ion battery, cylindrical technology, applied in the field of preparation of mixed solid-liquid lithium-ion batteries, can solve problems such as unsatisfactory ion conductivity

Inactive Publication Date: 2019-04-30
天臣新能源研究南京有限公司
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  • Summary
  • Abstract
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Problems solved by technology

[0007] In order to solve the problem of unsatisfactory ion conductivity of existing polymer and oxide solid electrolytes, the invention provides a method for preparing a cylindrical mixed solid-liquid lithium ion battery

Method used

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  • Preparation method of cylindrical mixed solid-liquid lithium ion battery

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Embodiment

[0035] Such as figure 1 Shown, a kind of preparation method of cylindrical mixed solid-liquid lithium ion battery comprises the steps:

[0036] Step 1. Mix and stir the polymer, conductive lithium salt, ionic liquid, plasticizer, and solvent for dissolving the high molecular polymer and lithium salt to form a transparent sol, wherein the solvent does not interact with the high molecular polymer and lithium salt. For the reaction, mix and stir the transparent sol and lithium ion conductive powder (that is, fast lithium ion conductors such as oxides or sulfides) to form a uniform composite system electrolyte sol, and test its viscosity;

[0037] Step 2, mix the positive electrode active material, conductive agent, binder, and solvent for dissolving the high molecular polymer and lithium salt, and stir evenly to prepare positive electrode slurry, wherein the solvent does not interact with the high molecular polymer and lithium salt. Reaction, mix the composite system electrolyte...

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Abstract

The invention relates to the technical field of battery preparation, and relates to a preparation method of a cylindrical mixed solid-liquid lithium ion battery. Uniform composite electrolyte sol is applied to both sides of a PE film by pulling. A porous PE film with a mature preparation process is used as a support, and electrolyte sol is applied to both sides of the PE film (i.e. a support film). A PE film-gel composite electrolyte film is prepared through heat treatment at high temperature. The strength of the PE film is enhanced. The PE film has good lithium ion conductivity and has good property of interface binding with cathode / anode plates.

Description

technical field [0001] The invention relates to the technical field of battery preparation, and relates to a method for preparing a cylindrical mixed solid-liquid lithium ion battery. Background technique [0002] As the main power source, lithium-ion batteries are widely used in portable mobile devices, automotive power, large energy storage devices and other fields. With the popularization of application fields and quantities, people have higher and higher requirements for the specific capacity, specific power and safety of lithium-ion batteries. [0003] Lithium-ion batteries commonly used in the market currently use liquid electrolytes, which mainly play the role of lithium ion conduction in the charging and discharging process in lithium-ion batteries. Lithium-ion liquid electrolytes contain organic solvents with low flash point and low ignition point, which are flammable and explosive. The battery is extremely easy to catch fire and even explode under extreme conditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525H01M10/058
CPCH01M10/0525H01M10/0565H01M10/058Y02E60/10Y02P70/50
Inventor 汪亚萍刘昌丹张果赵启荣李孟怀乐超刘云峰
Owner 天臣新能源研究南京有限公司
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