Electrode active material, electrode battery, and battery
By adding diamond-type silicon crystal phase to the electrode active substance and adjusting the five-membered ring size of the crystal phase of the silicon inclusion type II, the problem of large volume change during charging and discharging of Si is solved, and the volume change is suppressed and the function of the electrode active substance is extended.
CN119725508APending Publication Date: 2025-03-28TOYOTA JIDOSHA KK
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Patent Information
- Application Number
- CN202410854972.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-28
- Filing Date
- 2024-06-28
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
The volume of Si changes greatly during charging and discharging, resulting in a decrease in the function of the electrode active substance.
Method used
A small amount of crystal phase of diamond-type silicon is added to the electrode active material, and the five-membered ring size of the crystal phase of silicon inclusion type II is adjusted to a specific range to suppress volume changes during charging and discharging.
Benefits of technology
By this method, volume changes caused by charging and discharging can be effectively suppressed and the functional life of the electrode active substance can be extended.
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Abstract
The invention relates to an electrode active material, an electrode mixture, and a battery. Provided is an electrode active material having a silicon inclusion compound type II crystal phase, the size of a five-membered ring in the crystal phase being # imgabs 0 # or more and # imgabs 1 # or less.
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