Automotive lithium battery diaphragm and preparation method thereof

A technology for lithium battery separators and automobiles, which is applied in the direction of batteries, battery pack components, separators/films/diaphragms/spacers, etc., and can solve the problems of lithium battery safety reduction, electrolyte leakage, and film liquid absorption rate reduction, etc. problems, to achieve the effect of improving environmental adaptability, reducing environmental hazards, and shortening charging time
CN106450106AActive Publication Date: 2017-02-22INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
Publication Date
2017-02-22

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Abstract

The invention relates to a lithium battery diaphragm and a preparation method thereof. The lithium battery diaphragm has a multilayer structure, an organic polymer nuclear pore membrane serves as a base membrane, modified graphene oxide membranes are compounded on two sides of the base membrane, and a closed layer membrane is compounded on the outer layer of the graphene oxide membrane; the organic polymer nuclear pore membrane adopts a polyester (PET) nuclear pore membrane, a high density polyethylene nuclear pore membrane or an ultra-high molecular weight polyethylene nuclear pore membrane. The battery diaphragm disclosed by the invention has uniform pore structure and pore distribution as well as high porosity; due to the addition of the modified graphene oxide material, the hydrophilic performance of the membrane layer is improved, the environment adaptability of the diaphragm is improved, the resistance is reduced, and the battery efficiency is improved. Moreover, using metallic materials is avoided, and environmental hazards caused by the electrolyte membrane are reduced.
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Description

technical field

[0001] The invention relates to the field of battery diaphragms and manufacturing methods thereof, in particular to lithium battery diaphragms for new energy vehicles and their preparation methods. Background technique

[0002] In recent years, fuel cells as a next-generation energy source have been in the spotlight. In particular, a polymer electrolyte fuel cell (PEFC) using a proton-conductive polymer membrane as an electrolyte is expected to be widely used in cogeneration systems for household use, power supplies for portable devices, and power supplies for automobiles due to its high energy density. use in the field. The electrolyte membrane of PEFC is required to function as an electrolyte that conducts protons between the fuel electrode and the oxidation electrode, and is also required to be a partition wall that separates the fuel supplied to the fuel electrode from the oxidant supplied to the oxidation electrode. When the function as either the elec...

Claims

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