Gs Yuasa International Ltd.

Ryo Harada

Hiromasa Muramatsu

Akira Kishimoto

Daisuke Endo

Shinya Otani

A nonaqueous electrolyte solution secondary battery according to one aspect of the present invention is a nonaqueous electrolyte solution secondary battery including a positive electrode and a nonaqueous electrolyte solution. The positive electrode contains a sulfur-mesoporous carbon composite that is a composite of a sulfur-based active material and mesoporous carbon. The nonaqueous electrolyte solution contains a fluorinated solvent. The fluorinated solvent contains a chain fluorinated carbonate, a chain fluorinated carboxylic acid ester, or a combination thereof.

Nonaqueous electrolyte solution secondary battery

A nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte, in which the positive electrode includes, as an active material, a lithium-transition metal composite oxide that has an α-NaFeO-type crystal structure, and is represented by the general formula LiMeO(0<α, Me is a transition metal element containing Ni and Mn, or containing Ni, Mn, and Co), and has a diffraction peak observed in the range of 20° or more and 22° or less in an X-ray diffraction pattern obtained with a CuKα line.

Positive active material for nonaqueous electrolyte secondary battery, method for producing positive active material for nonaqueous electrolyte secondary battery, positive electrode for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery, method for manufacturing nonaqueous electrolyte secondary battery, and method of using nonaqueous electrolyte secondary battery

A positive active material for a nonaqueous electrolyte secondary battery, containing a lithium-transition metal composite oxide, in which the lithium-transition metal composite oxide has an α-NaFeOstructure, with the molar ratio Li/Me of Li to the transition metal (Me) being 1.05≤Li/Me<1.4, and contains Ni and Mn, or contains Ni, Co, and Mn as the transition metal (Me), with the molar ratio Mn/Me of Mn to Me being 0.4≤Mn/Me<0.6, and the molar ratio Ni/Me of Ni to Me being 0.2≤Ni/Me≤0.6.

Positive active material for nonaqueous electrolyte secondary battery, positive electrode for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery, method for manufacturing nonaqueous electrolyte secondary battery, and method of using nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte, the positive electrode containing, as a positive active material, a lithium transition metal composite oxide having an α-NaFeOtype crystal structure, a molar ratio of Li to Me, Li/Me of more than 1, Me representing transition metal elements including Ni and Mn or including Ni, Mn, and Co, and a molar ratio of Mn to Me, Mn/Me of 0.40 or more and 0.65 or less, and the nonaqueous electrolyte containing, as an electrolyte salt, LiPFand a lithium imide salt.

Nonaqueous electrolyte secondary battery, method of manufacturing nonaqueous electrolyte secondary battery, and method of using nonaqueous electrolyte secondary battery

Growing community of inventors

Kyoto, Japan

Ryo Harada