Inorganic materials for lithium-ion secondary battery packs

By using alumina or boehmite as inorganic additives in lithium-ion secondary battery packs to absorb moisture and hydrogen fluoride, the problem of reduced capacity and efficiency caused by moisture and hydrogen fluoride in battery packs is solved, thus extending the battery's lifespan.

CN114730964BActive Publication Date: 2026-05-26PACIFIC IND DEVELOPMENT CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PACIFIC IND DEVELOPMENT CORP
Filing Date
2020-10-30
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Lithium-ion secondary battery packs experience reduced capacity and efficiency, leading to shortened lifespan, when exposed to moisture, hydrogen fluoride, and transition metal ions for extended periods. Existing technologies struggle to effectively address these issues.

Method used

Alumina or boehmite is used as an inorganic additive to absorb moisture and hydrogen fluoride present in the battery pack. It is used as a trapping agent or coating material in the battery pack casing and applied to electrodes, separators and electrolytes to extend the storage and cycle life of the battery.

Benefits of technology

It effectively absorbs moisture and hydrogen fluoride, reducing the negative impact on battery pack performance, extending battery storage life and cycle life, and maintaining battery coulombic efficiency and discharge capacity.

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Abstract

A battery for use in an electrochemical battery such as a lithium-ion secondary battery pack includes a positive electrode having an active material as a cathode and a current collector; a negative electrode having an active material as an anode and a current collector; a non-aqueous electrolyte; and a separator disposed between the positive and negative electrodes. At least one of the cathode, the anode, the electrolyte, and the separator includes an inorganic additive in the form of a transition phase alumina or a boehmite, the inorganic additive absorbing one or more of moisture and / or hydrogen fluoride (HF) present in the battery. One or more batteries can be combined in a housing to form a lithium-ion secondary battery pack. The inorganic additive can also be integrated as a coating applied to the inner wall of the housing.
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