Preparation of conductive Cu1.5Mn1.5O4 and Mn3O4 spinel mixture powders as positive active materials in rechargeable Mg batteries operative at room temperature

Hayato Takemitsu, Yoshihiro Hayashi, Hiroto Watanabe, Toshihiko Mandai, Shunsuke Yagi, Yuya Oaki, Hiroaki Imai

研究成果: Article査読

抄録

We prepared conductive mixtures of Cu1.5Mn1.5O4 and Mn3O4 spinels (CMO–MOs) as positive electrode active materials in rechargeable Mg batteries (RMBs) using a sol–gel complex polymerization method. The CMO–MO spinel mixtures with high specific surface areas above 100 m2 g−1 were obtained with mild calcination in Ar at 300 °C. The conductivity of CMO–MOs was estimated to be approximately 1000 times higher than that of a conventional MgMn2O4 (MMO) spinel powder. The discharge capacities evaluated using 2032-type coin-cell battery with a Mg-alloy negative electrode at room temperature increase with an increase in the specific surface area of the spinel powders. The specific surface area for providing the theoretical capacity of the conductive CMO–MOs was about one-third that of the insulative MMO. High specific surface area and high conductivity are key parameters for the positive active material to realize practical room-temperature operation of RMBs. [Figure not available: see fulltext.]

本文言語English
ジャーナルJournal of Sol-Gel Science and Technology
DOI
出版ステータスAccepted/In press - 2022

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 化学 (全般)
  • 生体材料
  • 凝縮系物理学
  • 材料化学

フィンガープリント

「Preparation of conductive Cu1.5Mn1.5O4 and Mn3O4 spinel mixture powders as positive active materials in rechargeable Mg batteries operative at room temperature」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル