Multifunctional lithium-sulfur battery diaphragm and preparation method thereof

A lithium-sulfur battery and separator technology, applied in the field of energy materials, can solve the problem of single graphene coating with single function, and achieve the effects of reducing the possibility of passing through the separator, improving heat resistance, and increasing contact space.
CN107887553AActive Publication Date: 2018-04-06UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF ELECTRONIC SCI & TECH OF CHINA
Publication Date
2018-04-06

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Abstract

The invention relates to a multifunctional lithium-sulfur battery diaphragm and a preparation method thereof, belonging to the technical field of energy materials. The lithium-sulfur battery diaphragmsolves the technical problem that a pure graphene coating is single in function by taking a composite material compounded by sodium lignin sulfonate and reduced graphene oxide as a coating. The obtained composite material coated to the lithium-sulfur battery diaphragm will form an electriferous region under the ionizing action, so that one side of the diaphragm is with negative electricity. According to the principle of homopolar repulsion, the diaphragm with negative electricity will obviously repel polysulfide with negative electricity, so that the probability that polysulfide passes through the diaphragm is reduced effectively, the shuttling effect is reduced, and the battery performance is improved.
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Description

technical field

[0001] The invention belongs to the technical field of energy materials, and in particular relates to a separator for a high-performance lithium-sulfur battery and a preparation method thereof. Background technique

[0002] New energy vehicles are an important measure to alleviate my country's energy pressure, respond to climate change, and promote the sustainable development of the automobile industry and transportation industry. In recent years, my country's dependence on foreign oil consumption has reached 60.6%. Energy security, especially the security of oil and gas resources, has become an important factor restricting economic development. Vigorously developing renewable resources is the only way to realize the transformation of the automobile industry. The strategic choice of my country's energy security. However, renewable resources are uncontrollable and unstable, requiring the use of reliable energy storage batteries. As a commonly used energy stor...

Claims

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