Preparation method and application of porous SiO2 microspheres for lithium ion battery diaphragm

A lithium-ion battery and separator technology, which is applied in the field of preparation of porous SiO2 microspheres, can solve the problems of lower gas permeability, achieve the effect of improved ion conductance and simple operation
CN110767863AInactive Publication Date: 2020-02-07SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2020-02-07
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention provides a preparation method and application of porous SiO2 microspheres for a lithium ion battery diaphragm, which belong to the technical field of battery diaphragm coating. The preparation method for the porous SiO2 microspheres for the lithium ion battery diaphragm comprises the following steps of: preparing spherical SiO2 particles, adding the prepared spherical SiO2 particlesinto water, adding a protective agent, adding an alkaline solution, conducting stirring, conducting centrifuging and cleaning after etching for a certain time and acquiring a porous SiO2 microspheres.In addition, the invention also provides application of the porous SiO2 microspheres for the lithium ion battery diaphragm, and the application comprises the following steps of: taking a certain amount of porous SiO2 microspheres, dispersing the porous SiO2 microspheres by using a dispersing agent, adding a certain amount of a binder, preparing a coating solution, and coating a base membrane by using the coating solution. The porous SiO2 microspheres prepared by the preparation method disclosed by the invention are simple to prepare, and the coated diaphragm is good in air permeability and good in thermal stability, and has a good application prospect.
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Description

technical field

[0001] The invention belongs to the technical field of battery diaphragm coating, and in particular relates to a porous SiO used for a lithium-ion battery diaphragm 2 Preparation method and application of microspheres. Background technique

[0002] In recent years, with the rapid development of electric vehicles and portable electronic products and the use of large lithium-ion power batteries, the lithium battery industry has developed rapidly. Due to the expansion of application fields and increase in demand, the shape and size of batteries are changing, and lithium secondary batteries are required to have better durability and safety than existing small batteries.

[0003] From the perspective of lithium battery safety, more and more battery companies have begun to turn their attention to the field of diaphragm coating modification to produce composite lithium-ion battery diaphragms. The existing coated diaphragms are mainly coated with PP, PE and non-wov...

Claims

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