Honda Motor Co., Ltd.

Sanoh Industrial Co., Ltd.

Masashi Inamoto

Hideki Kurihara

Hiroshi Ogasa

Kyousuke Doumae

Yuichiro Takimoto

Atsushi Honda

Kazuyuki Sugita

Yoshiyuki Arai

The invention discloses a positive electrode active material for a magnesium secondary battery or lithium ion secondary battery, including: a particle including a nucleus and a crystal of vanadium oxide grown from the nucleus as a starting point and having a maximum length of 5 μm or less in the major axis direction.

Positive electrode active material, method for producing positive electrode active material, positive electrode, and secondary battery

To provide a lithium secondary battery capable of suppressing short circuits and having high energy density and high output. An electrolyte medium for a lithium secondary battery includes a low dielectric constant solvent, a lithium salt, and a polyvalent cation salt. The polyvalent cation salt is dispersed as particles in the electrolyte medium and can flow without being immobilized. The electrolyte medium includes 20 mass % or less of a high dielectric constant solvent. A lithium secondary battery including the electrolyte medium for a lithium secondary battery can suppress short circuits and provide high energy density and high output.

Electrolyte medium for lithium secondary battery and lithium secondary battery

Growing community of inventors

Saitama, Japan

Masashi Inamoto