Porous body for secondary battery, method for manufacturing the same, and secondary battery

By reacting hydroxyl-containing polymers with inorganic sulfates to create porous bodies and introducing sulfonic acid groups, the problems of low reactivity and insufficient safety in existing technologies are solved, achieving efficient electrolyte retention and excellent charge-discharge performance.

CN122291864APending Publication Date: 2026-06-26TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TOYOTA JIDOSHA KK
Filing Date
2025-12-24
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies for manufacturing porous materials for secondary batteries use strong acids or gaseous treatment agents, resulting in low reactivity and insufficient safety, making it difficult to effectively improve electrolyte retention and charge/discharge characteristics.

Method used

Porous bodies are manufactured by reacting hydroxyl-containing polymers with inorganic sulfates. Sulfonic acid groups are introduced through impregnation and heat treatment, avoiding the use of strong treatment agents and achieving a safe sulfonic acid group introduction.

Benefits of technology

The fabricated porous body exhibits good reactivity and safety, improves electrolyte retention, and provides excellent charge-discharge characteristics and self-discharge suppression.

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Abstract

The present invention aims to provide a porous body for secondary batteries that can be manufactured in a manner with good reactivity and high safety, and a method for manufacturing the same. The porous body for secondary batteries comprises a sulfonic acid-containing polymer. The sulfonic acid-containing polymer is a reaction product of a hydroxyl-containing polymer and an inorganic sulfate. The method for manufacturing the porous body for secondary batteries of the present invention includes: step (S1), preparing a porous body comprising the hydroxyl-containing polymer; and step (S2), immersing the porous body in an aqueous solution containing an inorganic sulfate, removing the porous body from the aqueous solution, and heating the porous body.
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Citation Information

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    JP1996236094A