Inactivating agent and inactivation method

JP2026098354APending Publication Date: 2026-06-17KK TOYOTA CHUO KENKYUSHO
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
KK TOYOTA CHUO KENKYUSHO
Filing Date
2024-12-05
Publication Date
2026-06-17

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Abstract

It is easy to handle and quickly deactivates non-aqueous secondary batteries. [Solution] The deactivator is a deactivator for deactivating a non-aqueous secondary battery, and comprises a redox shuttle agent whose oxidation-reduction potential is higher than that of the negative electrode active material of the non-aqueous secondary battery and lower than that of the positive electrode active material of the non-aqueous secondary battery at the Li reference potential, and a non-aqueous solvent with a flash point of 70°C or higher.
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Claims

1. A deactivating agent for inactivating non-aqueous secondary batteries, The redox shuttle agent comprises a redox shuttle agent having an oxidation-reduction potential higher than that of the negative electrode active material of the non-aqueous secondary battery and lower than that of the positive electrode active material of the non-aqueous secondary battery at a Li reference potential, and a non-aqueous solvent with a flash point of 70°C or higher. Inactivating agent.

2. The non-aqueous solvent has a viscosity of 1 cP or more, as described in claim 1.

3. The inactivator according to claim 1 or 2, comprising the redox shuttle agent at a concentration of 0.5 mol / L or higher.

4. The inactivator according to claim 1 or 2, wherein the non-aqueous solvent comprises one or more of triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, and γ-butyrolactone.

5. The inactivator according to claim 1 or 2, wherein the redox shuttle agent is a phenothiazine compound.

6. A method for deactivating non-aqueous secondary batteries, The addition step includes adding the inactivating agent described in claim 1 or 2 to the inside of the non-aqueous secondary battery. Inactivation method.

7. The deactivation method according to claim 6, wherein in the addition step, the deactivator is added such that the amount of the deactivator added relative to the capacity of the non-aqueous secondary battery is 5 μL / mAh or less.