Electrode, battery, and battery pack

The electrode composition with controlled binding of the conductive agent and binder in non-aqueous electrolyte batteries addresses oxidation issues, improving life performance and stability by reducing gas generation and resistance, thereby enhancing battery life and safety.

WO2025196892A1 Publication Date: 2025-09-25KK TOSHIBA
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Patent Information

Application Number
PCT/JP2024/010554
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-03-18
Publication Date
2025-09-25

AI Technical Summary

Technical Problem

Non-aqueous electrolyte batteries face issues with oxidation reactions between the positive electrode and electrolyte, leading to gas generation, increased resistance, and structural degradation, particularly in high-temperature environments, which affect battery life and performance.

Method used

An electrode composition is developed with a lithium-nickel-cobalt-manganese-containing oxide active material, a conductive agent, and a binder, where the binding between the conductive agent and binder is controlled to ensure uniform dispersion, reducing aggregation and promoting stable electrode structure through EGA-MS analysis.

Benefits of technology

The controlled binding results in improved life performance by minimizing gas generation and resistance increases, maintaining capacity, and preventing electrode cracking, thus enhancing the battery's cycle life and safety.

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Abstract

According to an embodiment of the present invention, there is provided an electrode containing active material matter, a conductive agent, and a binding agent. The active material matter contains an active material containing a lithium nickel cobalt manganese oxide. The ratio IAVE / ITOP of the average peak intensity IAVE at ±20°C from the peak top to the peak top intensity ITOP of the strongest peak in the m / z = 132 curve by thermally evolved gas analysis mass spectrometry is equal to or greater than 0.2 and less than 0.5. The ratio A44 / A132 of the area A44 under the m / z=44 curve in the range between 550°C and 600°C inclusive by thermally-induced evolved gas mass spectrometry to the area A132 under the m / z = 132 curve in the range between 200°C and 550°C inclusive is equal to or greater than 5 and less than 10.
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