Method for preparing biomass porous carbon material by coupling activation method and application thereof

Biomass-derived porous carbon materials were prepared by coupling activation method, which solved the problem of insufficient performance of biomass-based porous carbon materials and realized low-cost, high-performance supercapacitor electrode materials, which are suitable for electric vehicle acceleration and power grid frequency regulation.

CN122079155APending Publication Date: 2026-05-26GUILIN UNIV OF ELECTRONIC TECH
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Patent Information

Application Number
CN202610387036.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-27
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing technologies, petroleum bitumen-based porous carbon materials rely on fossil raw materials, which are costly and unsustainable, while biomass-based porous carbon materials have low specific capacitance and poor cycle stability, making it difficult to meet the high-performance requirements of supercapacitors.

Method used

A coupled activation method was adopted to prepare biomass-derived porous carbon materials using waste biomass as raw material through steps such as fermentation, acid leaching activation, low-temperature carbonization, alkali activation, and ultrasonic acid washing with dilute hydrochloric acid, forming a porous layered structure.

Benefits of technology

The prepared biomass-derived porous carbon material has excellent capacitance performance, low cost, and is easy to mass-produce. It also exhibits good stability and high specific capacitance in supercapacitors, making it suitable for short-term high-power demand scenarios.

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Abstract

The invention relates to the technical field of preparation of active carbon materials, in particular to a method for preparing a biomass porous carbon material through a coupling activation method and application of the biomass porous carbon material. The preparation method comprises the following steps: by taking waste biomass such as cassava peel as a raw material, performing fermentation, acid leaching activation, low-temperature carbonization, alkali activation, ultrasonic acid pickling and high-temperature impurity removal to obtain the biomass-derived porous carbon material, and performing electron microscope analysis and pore detection on the biomass-derived porous carbon material prepared by the steps. The biomass derived porous activated carbon material is of a porous layered structure and has abundant micropores and mesopores; according to the present invention, the electrochemical test experiment detection results show that the biomass derived porous carbon material has excellent capacitance performance, and when the current density is 0.5 A / g, the specific capacity value range is 200-400 F / g; the material also has good stability, the biomass derived porous carbon material is assembled into a symmetric supercapacitor, and after 10000 circles of stability tests, the retention rate of the specific capacitance of the symmetric supercapacitor can be maintained to be 90% or above.
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