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Lithium ion battery diaphragm and lithium ion battery equipped with same

A lithium-ion battery and separator technology, applied in the field of lithium-ion batteries and lithium-ion battery separators, can solve problems such as insufficient safety performance of lithium-ion batteries, and achieve the effects of avoiding battery thermal runaway, improving safety, and reducing the probability of reaction.

Pending Publication Date: 2019-04-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a lithium-ion battery separator and a lithium-ion battery having the same for the problem that the safety performance of the existing lithium-ion battery is not good enough.

Method used

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  • Lithium ion battery diaphragm and lithium ion battery equipped with same
  • Lithium ion battery diaphragm and lithium ion battery equipped with same
  • Lithium ion battery diaphragm and lithium ion battery equipped with same

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Embodiment Construction

[0030] In order to make the object, technical solution and technical effect of the present invention clearer, specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] see figure 1 An embodiment of the present invention provides a separator for a lithium ion battery, including a porous substrate layer 100 and an oxygen absorbing layer 200 that are laminated, and the oxygen absorbing layer 200 includes an oxygen absorbing material.

[0032] In the embodiment of the present invention, an oxygen absorbing layer 200 is provided, and the oxygen absorbing layer 200 is coated on the surface of the porous substrate layer 100 to form a multi-layer diaphragm. The diaphragm has the ability to absorb oxygen, which can effectively reduce the oxygen content in the battery,...

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Abstract

The invention relates to a lithium ion battery diaphragm. The lithium ion battery diaphragm comprises a porous base material layer and an oxygen absorption layer which are arranged in a stacked mode,wherein the oxygen absorption layer comprises an oxygen absorbing material. The invention further relates to a lithium ion battery which comprises a positive electrode, a negative electrode, the lithium ion battery diaphragm arranged between the positive electrode and the negative electrode, and an electrolyte, wherein the lithium ion battery diaphragm comprises the abovementioned lithium ion battery diaphragm; and the oxygen absorption layer is close to the positive electrode.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a lithium ion battery separator and a lithium ion battery with the same. Background technique [0002] Separator is one of the important components of Li-ion battery. At present, the most widely used diaphragms are single-layer polyethylene diaphragm (PE), polypropylene diaphragm (PP), PP / PE / PP three-layer composite diaphragm and PP / PE diaphragm with ceramic coating. The main function of the diaphragm is to effectively isolate the positive and negative electrodes, prevent the electron conduction between the positive and negative electrodes, and at the same time ensure that lithium ions can pass through effectively and quickly. Appropriate porosity is the key to realize the above functions of the separator. Too small porosity is not conducive to the shuttle of lithium ions in the electrolyte, resulting in excessive internal resistance of the battery and reduced cycle life; while...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/0525H01M50/449H01M50/491
CPCH01M10/0525H01M50/431H01M50/403H01M50/449H01M50/411Y02E60/10
Inventor 刘翔任东生冯旭宁卢兰光欧阳明高
Owner TSINGHUA UNIV
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