Ceramic diaphragm and preparation method thereof, and lithium ion battery

A lithium-ion battery and ceramic diaphragm technology, applied in the field of lithium-ion batteries, can solve the problems of affecting the life of lithium-ion batteries, the decrease of battery cycle life, and the decrease of battery performance, so as to improve safety performance and cycle performance, light specific gravity, and reduce wear and tear degree of effect
CN110459722AInactive Publication Date: 2019-11-15KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
Publication Date
2019-11-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a ceramic diaphragm and a preparation method thereof, and a lithium ion battery. The method comprises steps that (1) ball milling of alumina ceramics is performed to obtain alumina ceramic powder; (2), mixing binder with organic solvent and polytetraethylene-pyridine is performed to obtain glue solution; (3), mixing the said alumina ceramic powder with the glue solution isperformed to obtain slurry; and (4), the slurry is applied to at least a part of a base film, and the ceramic diaphragm is obtained after drying. The method is advantaged in that the method can prepare the ceramic diaphragm with high air permeability and good thermal stability, the ceramic diaphragm can capture Mn2+ ions, the Mn2+ ions are applied to in a lithium ion battery, deposition of dissolved manganese on a negative electrode can be effectively reduced, and thereby safety performance and cycle performance of the lithium ion battery are improved.
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Description

technical field

[0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a ceramic diaphragm, a preparation method thereof and a lithium ion battery. Background technique

[0002] Lithium-ion batteries have the characteristics of high energy density, high specific power, good cycle performance, no memory effect, and no pollution. They have good economic benefits, social benefits, and strategic significance. They have become the most eye-catching green chemical power sources.

[0003] In lithium-ion batteries, the separator mainly plays the role of preventing positive and negative electrodes from contacting and allowing ion conduction, and is an important part of the battery. At present, commercial lithium-ion batteries mainly use polyolefin diaphragm materials with microporous structures, such as single-layer or multi-layer films of polyethylene (Polyethylene, PE) and polypropylene (Polypropylene, PP). Due to the characteristics of th...

Claims

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