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US 12,113,216 B2Granted
Negative electrode active material for secondary batteries, and secondary battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYohei Uchiyama, Taisuke Asano, Yosuke Sato
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Abstract
A negative electrode active material for a secondary battery includes silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase, the silicate phase is an oxide phase containing Si, O, and alkali metals, and the alkali metals include at least Na and K.
Claims12
A negative electrode active material for a secondary battery, comprising:
- silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase,
- wherein the silicate phase is an oxide phase which contains Si, O, and alkali metals, and
- the alkali metals include at least Na and K, and
- wherein, with respect to a total amount of elements other than O contained in the silicate phase,
- a content of Na is 7 percent by mole or more,
- a content of K is 7 percent by mole or more, and
- a total content of Na and K is 70 percent by mole to 40 percent by mole.
4 more elements
Dependencies are inferred from the claim text.