A room-temperature micro hydrogen sulfide gas sensor for thermal runaway detection of all-solid-state batteries and a preparation method thereof

By fabricating a miniature hydrogen sulfide gas sensor based on a CaFe-HHTP/CaFe-LDH composite structure in an all-solid-state battery, the problem of low sensor sensitivity in an oxygen-free environment was solved, achieving highly sensitive detection of hydrogen sulfide gas, preventing thermal runaway, and improving safety.

CN122409767APending Publication Date: 2026-07-17TAIYUAN UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TAIYUAN UNIVERSITY OF TECHNOLOGY
Filing Date
2026-05-14
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing all-solid-state batteries lack highly sensitive and interference-resistant room-temperature hydrogen sulfide gas sensors in oxygen-free environments, leading to untimely detection of thermal runaway and increasing safety risks.

Method used

A resistive gas sensor based on a bimetallic conductive CaFe-HHTP/CaFe-LDH composite structure was developed. By fabricating ring-shaped gold interdigitated electrodes on a micro silica substrate and growing CaFe-LDH nanosheets and CaFeHHTP nanorods in situ, a hierarchical porous three-dimensional network structure was formed for the detection of hydrogen sulfide gas.

Benefits of technology

It achieves highly sensitive detection of hydrogen sulfide gas in an oxygen-free environment, providing timely warning of thermal runaway in all-solid-state batteries and improving safety and reliability.

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Abstract

The application discloses a room-temperature micro hydrogen sulfide gas sensor for all-solid-state battery thermal runaway detection and a preparation method thereof, and belongs to the technical field of gas sensing. The structure of the room-temperature micro hydrogen sulfide gas sensor comprises, from bottom to top, a substrate layer, a gold interdigital electrode and a CaFeHHTP / CaFe-LDH composite sensitive layer arranged in sequence. The CaFe-LDH nanomaterial is prepared by a mild hydrothermal method, and then a bimetallic conductive metal organic framework CaFeHHTP is in-situ grown on the surface of the CaFe-LDH through a solvothermal method, so as to form the CaFeHHTP / CaFe-LDH composite sensitive material. The composite material exhibits excellent room-temperature hydrogen sulfide gas sensing performance in an oxygen-free environment, is suitable for real-time dynamic monitoring of hydrogen sulfide gas released in an initial stage of all-solid-state battery thermal runaway, can timely give an early warning, prevents the thermal runaway from being further intensified, and has important practical significance for improving safety guarantee of drivers and passengers.
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