Yokohama National University

Nisshinbo Holdings Inc.

National University Corporation Yokohama National University

Kaoru Dokko

Masayoshi Watanabe

Shiguo Zhang

Masao Iwaya

Yu Onozaki

Risa Nozawa

Kazuhide Ueno

Zhe Li

Azusa Yamazaki

Kazuki Yoshida

Ryuji Harimoto

Naoki Tachikawa

Toshihiko Mandai

Ce Zhang

Mizuho Tsuchiya

Jun-Woo Park

Watanabe Masayoshi

A production method for a cathode material of a lithium sulfur battery includes, in sequence: a step of preparing a first dispersed solution in which a carbon particle is dispersed in a lithium sulfate solution; a step of adding a solvent in the first dispersed solution, the solvent being a solvent in which lithium sulfate is insoluble; a step of separating a precursor particle from the first dispersed solution in which the solvent is added; and a step of changing the precursor particle into a cathode active material particle by heating the precursor particle under an inert atmosphere.

Production method for cathode material of lithium sulfur battery, cathode material of lithium sulfur battery, and lithium sulfur battery

A carbon material according to an embodiment contains: 2% by mass or more and 15% by mass or less of nitrogen and 0.3% by mass or more and 2.5% by mass or less of sulfur, and 40% by mass or more of the nitrogen is a graphitic nitrogen.

Carbon material, fuel cell, and method for producing carbon material

An alkali metal-sulfur-based secondary battery, in which coulombic efficiency is improved by suppressing a side reaction during charge, and a reduction in discharge capacity by repetition of charge and discharge is suppressed and which has a long battery life and an improved input/output density, includes a positive electrode or a negative electrode containing a sulfur-based electrode active material; an electrolyte solution containing an ether compound such as THF and glyme and a solvent such as a fluorine-based solvent, wherein at least a part of the ether compound and the alkali metal salt forms a complex; and a counter electrode.

Alkali metal-sulfur-based secondary battery

Growing community of inventors

Yokohama, Japan

Kaoru Dokko