Positive electrode material for magnesium storage battery

Realization of over 2x high potential characteristic than conventional one!

Overview

　Magnesium battery has being researched and developed as a promising candidate for post lithium ion battery due to its abundant reserve and high capacity per volume. Up to now, a material with chevrel structure was almost the only known positive electrode material for practical magnesium battery. However, the electromotive force is about 1 V which is low, and a material that can generate high electromotive force has been searched.
　This invention is about a material based on a spinel structure that solves above issues. By employing a defective spinel type oxide that contains defect in the cation site, this invention has succeeded to suppress the crystal structure change due to insertion and desorption of magnesium. As a result, it offers a positive electrode material with higher working potential and improved cycle characteristic than conventional material.

Features・Outstandings

Product Application

・Magnesium storage battery　
・Expected to be applied to multivalent cation storage battery

Related Works

[1] Kohei Shimokawa, Tetsu Ichitsubo et al. , Structure Design of Long-Life Spinel-Oxide Cathode Materials for Magnesium Rechargeable Batteries, Adv Mater 33, 2007539 (2021).

IP Data

IP No.　 ： JP2019-155969 (Japan)
Inventor ： ICHITSUBO Tetsu, SHIMOKAWA Kohei
keyword ： MagnesiumBattery, PostLithiumIonBattery