High energy density rechargeable magnesium battery using earth-abundant and non-toxic elements

• DOI: 10.1038/srep05622
• Publication Date: 2014-07-11T09:07:16Z
• Authors: Yuki Orikasa; Titus Masese; Yukinori Koyama; Takuya Mori; Masashi Hattori; Kentaro Yamamoto; Tetsuya Okado; Zhen-Dong Huang; Taketoshi Minato; Cédric Tassel; Jungeun Kim; Yoji Kobayashi; Takeshi Abe; Hiroshi Kageyama; Yoshiharu Uchimoto
• Keywords: Energy density

Abstract Rechargeable magnesium batteries are poised to be viable candidates for large-scale energy storage devices in smart grid communities and electric vehicles. However, the density of previously proposed rechargeable is low, limited mainly by cathode materials. Here, we present new design approaches order realize a high-energy-density battery system. Ion-exchanged MgFeSiO 4 demonstrates high reversible capacity exceeding 300 mAh·g −1 at voltage approximately 2.4 V vs. Mg. Further, electronic crystal structure ion-exchanged changes during charging discharging processes, which (de)insertion host structure. The combination with bis(trifluoromethylsulfonyl)imide–triglyme electrolyte system this work provides low-cost practical density, free from corrosion safety problems.