Panasonic Intellectual Property Management Co., Ltd.

Taisuke Asano

Yohei Uchiyama

Yosuke Sato

Hiroshi Minami

Taisuke Yamamoto

Tatsuya Akira

Norihisa Yamamoto

A negative electrode material for a non-aqueous electrolyte secondary battery, including a silicate phase, silicon particles dispersed in the silicate phase, and a crystal phase dispersed in the silicate phase. The silicate phase contains at least one element E1 selected from the group consisting of alkali metal elements and Group 2 elements. The crystal phase contains a rare earth element, silicon, and oxygen.

Negative electrode material for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery

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 K and Li.

Negative electrode active material for secondary batteries, and secondary battery

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.

A negative electrode active material for a secondary battery includes a silicate composite particle. The silicate composite particle contains silicate phases, silicon particles dispersed in the silicate phases, and a carbon phase. The silicate phases contain at least one selected from the group consisting of an alkali metal and an alkaline earth metal. At least parts of the carbon phase coat at least parts of surfaces of the silicon particles.

Disclosed is a negative electrode material for a non-aqueous electrolyte secondary battery, including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and at least one element Me dispersed in the lithium silicate phase, and selected from the group consisting of a rare-earth element and an alkaline-earth metal. The composition of the lithium silicate phase is represented, for example, by the formula: LiSiO, and satisfies 0&#x3c;z&#x3c;2, and the element Me is dispersed in the lithium silicate phase, for example, as an Me oxide.

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Hyogo, Japan

Taisuke Asano