Biomass starch-based porous activated carbon nanofiber as well as preparation method and application thereof

CN121896752APending Publication Date: 2026-04-21ANHUI POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI POLYTECHNIC UNIV
Filing Date
2026-01-26
Publication Date
2026-04-21

AI Technical Summary

Technical Problem

Existing supercapacitor electrode materials rely on petroleum-based polymer precursors, which involve complex and dangerous processes and limited structural control, resulting in low energy density and environmental unfriendliness.

Method used

Using biomass starch as a precursor, hierarchical porous O, N, and S triple-doped carbon nanofibers were prepared through electrospinning and a mild water-based activation and heteroatom doping strategy, simplifying the process and reducing environmental pollution.

Benefits of technology

This improves the specific surface area and ion transport kinetics of the material, enhances the contribution of pseudocapacitance, achieves high power characteristics and high energy density, and ensures safe and environmentally friendly processes.

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Abstract

The invention discloses a biomass starch-based porous activated carbon nanofiber and a preparation method and application thereof, and belongs to the technical field of supercapacitor electrode materials. According to the method, PMMA is decomposed to form mesopores / macropores, KOH is activated to create micropores, and an ideal path of'buffer-high-speed transmission-effective storage 'of ions is realized through cooperation of PMMA, KOH and mesoporous / macropores, so that the prepared biomass starch-based porous activated carbon nanofiber has a hierarchical porous structure, and the high-power characteristic of the biomass starch-based porous activated carbon nanofiber is ensured. According to the invention, through O, N and S three-doping, abundant pseudocapacitance active sites are introduced, through multiple heteroatom doping, the specific capacity and the energy density are greatly improved, and the surface wettability and the electronic conductivity of the carbon material are also improved. The KOH / thiourea mixed aqueous solution is adopted for one-step impregnation, and activation and N and S co-doping are achieved at the same time. The process avoids the use of a strong corrosive and toxic reagent of pure KOH, and is simple in flow, safe and environment-friendly.
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