Application of nitrogen-doped carbon-coated Co and/or Co3ZnC composite material in preparation of lithium-sulfur battery diaphragm

A technology of nitrogen-doped carbon and composite materials, which is applied in the direction of lithium batteries, carbon preparation/purification, carbon compounds, etc., can solve the problems of poor affinity and not enough to effectively inhibit the shuttle effect of polysulfides, and achieve novel structures and improved Electrochemical performance, the effect of simple synthesis process
CN112670669APending Publication Date: 2021-04-16SOUTH CHINA AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA AGRI UNIV
Publication Date
2021-04-16

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Abstract

The invention belongs to the field of nano materials and lithium-sulfur batteries, and discloses an application of a nitrogen-doped carbon-coated Co and / or Co3ZnC composite material in preparation of a lithium-sulfur battery diaphragm. The preparation method comprises the following steps: dissolving Pluronic F-127 in water, adding a carbon source dicyandiamide, adding a positive bivalent cobalt salt and a positive bivalent zinc salt, performing further stirring, evaporating water to dryness to obtain a solid compound, and carrying out high-temperature carbonization under the protection of N2 gas. In the process, dicyandiamide is carbonized to obtain N-doped carbon, reducing substances such as carbon monoxide, carbon dioxide, nitric oxide and carbon generated in the carbonization process of dicyandiamide can reduce and carbonize cobalt and zinc to obtain Co or Co3ZnC, and a target product is obtained after the reaction is completed. The N-doped carbon-coated Co and / or Co3ZnC composite material is used as a diaphragm modification material and is coated on a commercial diaphragm by a scraper method, and the electrochemical performance of the lithium-sulfur battery can be effectively improved when the N-doped carbon-coated Co and / or Co3ZnC composite material is applied to the lithium-sulfur battery.
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Description

technical field

[0001] The invention belongs to the field of nanomaterials and lithium-sulfur batteries, in particular to a nitrogen-doped carbon-coated Co and / or Co 3 Application of ZnC composite materials in the preparation of lithium-sulfur battery separators. Background technique

[0002] With the increasing global energy demand and the gradual depletion of fossil energy, human beings urgently need to develop and utilize clean energy such as wind energy, solar energy and geothermal energy. However, when the proportion of photovoltaic and wind power integrated into the existing power grid exceeds 10%, it will have a significant impact on the local power grid. Therefore, the research and development of efficient and safe power storage technology is the key to large-scale and efficient use of these energies. Compared with the currently used lead-acid batteries, nickel-metal hydride batteries, and lithium-ion battery energy storage systems, lithium-sulfur batteries are cons...

Claims

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