High-performance flexible composite nonwoven fabric membrane for lithium ion battery, as well as preparation method and application of membrane

A lithium-ion battery and non-woven membrane technology, which is applied to battery components, circuits, electrical components, etc., can solve the problems of complex preparation process, reduction of the maximum pore size of the non-woven membrane, and high membrane cost
CN103296240AInactive Publication Date: 2013-09-11GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
Publication Date
2013-09-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high-performance flexible composite nonwoven fabric membrane for a lithium ion battery, as well as a preparation method and an application of the membrane, which belongs to the technical field of a lithium-ion battery membrane material. The prepared composite nonwoven fabric membrane is formed by coating functional serous fluid with thermally curable or optically curable functional groups onto a substrate membrane containing an active functional group, thermally curing or optically curing the substrate membrane, removing a pore-forming agent, and hot pressing and drying the substrate. The prepared composite nonwoven fabric membrane is good in flexibility. The composite nonwoven fabric membrane has good ion electric conductivity and hot shrinkage resistance, can bear the large-current discharge, and also can improve the safety performance of the battery. Since no fluorine-containing adhesive is used in a preparation process, nano particles or nano optical fibers are connected with the substrate membrane through a chemical key, the nano particles or the nano fibers are bonded together through the chemical key and free from dropping off in the charging-discharging cycle, the stability of the coating is enhanced, and the cycling performance of the battery can be improved. The prepared flexible composite nonwoven fabric membrane is used as a membrane assembly of the lithium ion battery.
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Description

technical field

[0001] The invention belongs to the technical field of lithium-ion battery membrane materials, and in particular relates to a high-performance flexible composite non-woven fabric membrane for lithium-ion batteries, a preparation method and application thereof. Background technique

[0002] Lithium-ion battery is an electrical device that realizes energy conversion, storage and release of electrical energy through the migration of lithium ions between the positive and negative electrodes. Lithium-ion batteries are widely used in digital cameras, mobile phones, In small and medium electronic devices such as notebook computers.

[0003] Due to the increasing shortage of chemical energy and the increasing pressure on environmental protection, many countries have devoted themselves to developing environmentally friendly electric bicycles, pure electric vehicles, and hybrid electric vehicles (HEV) in recent years. The specific energy density of lithium-ion batteri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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