Active material
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United States of America
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Mar 25, 2025
Grant Date -
Apr 25, 2024
app pub date -
Dec 29, 2023
filing date -
Dec 29, 2023
priority date (Note) -
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Abstract
A main object of the present disclosure is to provide an active material wherein an expansion upon intercalation of a metal ion such as a Li ion is suppressed. The present disclosure achieves the object by providing an active material comprising a silicon clathrate type crystal phase, and the active material includes a Na element, a Si element and a M element that is a metal element with an ion radius larger than the Si element, and a proportion of the M element to a total of the Si element and the M element is 0.1 atm % or more and 5 atm % or less.
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