Manufacturing method for supercapacitor carbon materials

By using calcium or magnesium hydroxide to deactivate alkali metals in the supercapacitor carbon material production process, the safety risks are mitigated while maintaining high performance characteristics.

JP7874208B1Pending Publication Date: 2026-06-15CPC CORPORATION
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
CPC CORPORATION
Filing Date
2025-02-14
Publication Date
2026-06-15

AI Technical Summary

Technical Problem

Existing methods for producing supercapacitor carbon materials using alkali metal hydroxides pose safety risks due to the reactivity of alkali metals, which can lead to explosions and fires during the activation process.

Method used

Incorporating calcium hydroxide or magnesium hydroxide as a deactivator to convert alkali metals into safer compounds like potassium carbonate, followed by a series of heat treatments and washing steps to produce a supercapacitor carbon material with controlled porosity and high specific surface area.

Benefits of technology

The method enhances safety by stabilizing alkali metals, maintaining a high specific surface area, and achieving a supercapacitor carbon material with improved energy density and stability.

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Abstract

This invention provides a method for manufacturing supercapacitor carbon materials that can improve safety during the preparation of supercapacitor carbon materials by inactivating highly flammable alkali metals into safe potassium carbonate. [Solution] The manufacturing method includes the steps of: (A) applying a first heat treatment to heavy oil to form a soft carbon precursor structure having a mesophase structure ratio exceeding 50%, a quinoline insoluble content of 95% to 98%, and a toluene insoluble content of 89% to 91%; (B) polishing and classifying the soft carbon precursor structure, then mixing it with an activator and an inactivator to form a mixture; (C) performing activation and carbonization treatments; (D) removing residual activator, neutralizing it by pickling and washing with water, and then drying it at 90°C for at least 16 hours to obtain an activated carbon material; and (E) applying a second heat treatment to the activated carbon material to form a supercapacitor carbon material.
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Citation Information

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