Composite hard carbon negative electrode material as well as preparation method and application thereof

By mixing asphalt and waste plastic in a specific proportion and processing, composite hard carbon anode material suitable for sodium ion batteries was prepared, which solved the problem that the negative electrode material in the prior art was not suitable for sodium batteries and asphalt carbide high degree of graphitization, and achieved high capacity, low cost and low degree of graphitization material preparation, improving the performance of sodium batteries and reducing environmental pollution.

CN119695076APending Publication Date: 2025-03-25SHANGHAI SHANSHAN NEW MATERIAL CO LTD
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Patent Information

Application Number
CN202411940408.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

In the prior art, the negative electrode material is not suitable for use in sodium batteries, the resulting products at high temperatures of asphalt carbonization have a high degree of graphitization, and the waste plastics have environmental pollution problems.

Method used

By mixing the asphalt with waste plastic in a specific proportion, and performing fine pulverization, pre-oxidation treatment and carbonization, composite hard carbon anode material suitable for sodium ion batteries is prepared.

Benefits of technology

The prepared composite hard carbon anode material has low cost, high capacity and low graphitization. It is suitable for use in sodium ion batteries, improving the discharge capacity and Coulomb efficiency of sodium batteries, and effectively utilizing waste plastics and reducing environmental pollution.

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Abstract

The invention discloses a composite hard carbon negative electrode material as well as a preparation method and application thereof. The composite hard carbon negative electrode material disclosed by the invention comprises the following raw materials: asphalt and waste plastic, the asphalt is selected from one or more of petroleum asphalt, coal-based asphalt and natural asphalt; the waste plastic is selected from one or more of polycarbonate, polyethylene terephthalate, polystyrene, polyethylene, polypropylene, polyvinyl chloride and polyacrylonitrile; the mass ratio of the asphalt to the waste plastic is 1: (0.1-2.0). The composite hard carbon negative electrode material disclosed by the invention is low in cost, high in capacity, low in graphitization degree and suitable for being applied to the sodium ion battery.
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