Sony Corporation

Motoki Endo

Kenichi Kawase

Takakazu Hirose

Masayuki Iwama

Takashi Fujinaga

Masaharu Senoue

A lithium-ion secondary battery allowed to improve cycle characteristics and initial charge-discharge characteristics is provided. The lithium-ion secondary battery includes: a cathode; an anode including an anode active material layer; and an electrolytic solution. The anode active material layer includes an anode active material and an inorganic compound, and the inorganic compound includes one or both of an alkoxysilane compound and a hydrolysate thereof.

Lithium-ion secondary battery, anode for lithium-ion secondary battery, power tool, electric vehicle and energy storage system

A lithium-ion secondary battery allowed to improve cycle characteristics and initial charge-discharge characteristics is provided. The lithium-ion secondary battery includes a cathode; an anode; and an electrolytic solution. The anode includes an anode active material layer including a plurality of anode active material particles. The anode active material particles each include a core section and a coating section applied to a part or a whole of a surface of the core section, and the core section includes a silicon-based material (SiO: 0&#x2266;x&#x3c;0.5) and the coating section includes an amorphous or low-crystalline silicon-based material (SiO: 0.5&#x2266;y&#x2266;1.8).

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Fukushima, Japan

Motoki Endo