Lithium ion battery composite membrane and preparation method thereof
A lithium-ion battery and composite diaphragm technology, which is applied in secondary batteries, battery pack components, circuits, etc., can solve the problems of complex process and difficult control of process conditions, and achieve simple process, excellent thermal stability, and improved thermal stability. sexual effect
Active Publication Date: 2016-09-21
东莞市魔方新能源科技有限公司
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Abstract
The invention belongs to the technical field of lithium ion batteries, and especially relates to a lithium ion battery composite membrane and a preparation method thereof. The composite membrane comprises a membrane substrate and a composite coating which is coated on at least one surface of the membrane substrate; the composite coating comprises an inorganic particle, a polymer and a binder; the polymer forms adhesive polymers through the binder; and the adhesive polymers are distributed in the inorganic particle and protrude out of the surface of the inorganic particle. Compared with the prior art, the inorganic particle in the composite coating has excellent heat stability, and suppresses heat shrinkage of a traditional membrane substrate under high temperature conditions, so that the heat stability of the membrane substrate can be greatly improved; and meanwhile, the protruded adhesive polymers in the composite coating can be bonded together with a pole piece in a lithium ion battery to suppress deformation of the battery, so as to guarantee the safety and smoothness of the battery. Furthermore, the preparation method of the lithium ion battery composite membrane provided by the invention is simple in process, easy in operation and the obtained membrane is high in consistency.
Application Domain
Secondary cellsCell component details
Technology Topic
Lithium electrodeInorganic particle +7
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PUM
Property | Measurement | Unit |
The average particle size | 0.05 ~ 6.0 | µm |
Particle size distribution range | 0.01 ~ 10.0 | µm |
The average particle size | 0.005 ~ 10.0 | µm |
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