Method for preparing porous carbon microspheres through microwave induction of high-entropy alloy-petroleum coke and application

Porous carbon microspheres were prepared by microwave-induced high-entropy alloy-petroleum coke method, which solved the problem of insufficient specific surface area and microporosity of porous carbon materials in the prior art. Porous carbon microspheres with high conductivity and high stability were achieved, which are suitable for lithium-ion battery anode materials.

CN121493968APending Publication Date: 2026-02-10CENT SOUTH UNIV
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Patent Information

Application Number
CN202511668228.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-14
Publication Date
2026-02-10

AI Technical Summary

Technical Problem

Existing technologies struggle to prepare porous carbon materials with high specific surface area, high microporosity, and high electrical conductivity. Conventional methods suffer from problems such as low activation efficiency, uneven pore size distribution, and low graphitization, which cannot meet the high energy density requirements of next-generation lithium-ion batteries.

Method used

A microwave-induced high-entropy alloy-petroleum coke method was adopted. Petroleum coke powder was activated by low-temperature plasma, freeze-dried, and then mixed with a variety of transition metal salt solutions. The mixture was then subjected to microwave radiation and high-temperature activation treatment, and finally acid washing was performed to prepare porous carbon microspheres.

Benefits of technology

The prepared porous carbon microsphere material has a specific surface area higher than 1900 m2/g, a microporosity of not less than 82%, and an electrical conductivity of not less than 4 S/mm, which significantly improves the conductivity and structural stability of the material and makes it suitable for lithium-ion battery anode materials.

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Abstract

The invention belongs to the technical field of battery materials, and mainly relates to a method for preparing porous carbon microspheres through microwave induction of high-entropy alloy-petroleum coke and application. The method comprises the following steps: performing low-temperature plasma activation treatment on crushed and sieved petroleum coke powder to obtain activated petroleum coke powder; mixing and reacting the activated petroleum coke powder with a salt solution containing at least five transition metals, and performing freeze drying to obtain a high-entropy alloy-petroleum coke composite material precursor; the high-entropy alloy-petroleum coke composite material precursor is subjected to microwave radiation treatment in an inert atmosphere, and a carbonized precursor of a spherical structure is obtained; and performing high-temperature activation treatment on the carbonized precursor with the spherical structure in an activation atmosphere, and performing acid pickling and drying to obtain the porous carbon microsphere material. According to the method, the porous carbon microsphere material with high specific surface area, high microporosity and excellent conductivity is prepared through plasma activation, multi-metal complexation, microwave radiation and high-temperature activation treatment, and can be applied to a negative electrode material of a lithium ion battery.
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