Lithium metal electrode surface oxidized composite protective layer structure and preparation method thereof

A lithium metal electrode, surface oxidation technology, applied to battery electrodes, structural parts, non-aqueous electrolyte battery electrodes, etc., can solve the problems of poor processing performance of solid electrolyte materials, failure of composite protective layer, and easy breakage, and simplify battery assembly process, improving cycle stability, and suppressing the effect of lithium dendrites
CN108565397AActive Publication Date: 2018-09-21四川华昆能源有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
四川华昆能源有限责任公司
Publication Date
2018-09-21

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Abstract

The invention belongs to the technical field of lithium metal electrode oxidation protection and discloses a lithium metal electrode surface oxidized composite protective layer structure and a preparation method thereof. The lithium metal electrode surface oxidized composite protective layer structure comprises a plurality of electronic insulated two-dimensional lamellar structural layers; a phenyl sulfide conducting layer is arranged between every two adjacent two-dimensional lamellar structural layers; the preparation method comprises the steps of A, dispersing graphene oxide powder fully inan organic solvent to obtain a dispersion; B, adding thioether with benzene functional groups into the dispersion, mixing well for dissolving to obtain a coating solution; C, spraying the coating solution to a battery diaphragm substrate, evaporatively drying the solvent to obtain a diaphragm with an even coating. Organic phenyl sulfide small molecules are introduced among the multiple two-dimensional lamellar structural layers; lithium ion transfer passages formed by S-S crosslinked structure that the resultant forms through spontaneous reaction; electrolyte and lithium metal can be isolatedfrom direct contact; cycle stability of lithium metal is improved.
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Description

technical field

[0001] The invention belongs to the technical field of oxidation protection of lithium metal electrodes, and in particular relates to a structure and a preparation method of an oxidation composite protective layer on the surface of lithium metal electrodes. Background technique

[0002] At present, lithium-ion batteries, as the energy storage device with the highest energy density and the most mature technology, have been widely used in many fields such as portable electronic devices, electric vehicles, bicycles, and energy storage power stations. However, the energy density of the lithium-ion battery system based on the intercalation-extraction mechanism has reached the bottleneck, and it is difficult to further improve it, which cannot meet the demand for high-energy-density energy storage devices in the electric field and energy storage power station field.

[0003] At this stage, a variety of high-energy-density energy storage device systems have been dev...

Claims

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