@article{b942a361a5dd4e24b52a9a1c408741a4,
title = "Copper Selenide as a New Cathode Material based on Displacement Reaction for Rechargeable Magnesium Batteries",
abstract = "Rechargeable performance was realized in a Mg-battery using a β-Cu2Se cathode. The average specific capacity was approximately 120 mAh/g for the first 35 cycles at room temperature, which was comparable with that of Chevrel phase as a prototype cathode material for Mg-batteries. The specific capacity was improved up to about 230 mAh/g by downsizing β-Cu2Se crystals, the short side length of which is about ∼100 nm. The displacement reaction, in which the inserted Mg ions induce the displacement and extrusion of Cu ions from Se-sublattices, was suggested as the plausible mechanism for the reversible electrochemical reaction in the battery cell cathode. This mechanism was supposed from the structural relationship between β-Cu2Se and MgSe.",
keywords = "cathode, displacement reaction, magnesium battery, multi-valent ion battery, selenide",
author = "Yuta Tashiro and Kouji Taniguchi and Hitoshi Miyasaka",
note = "Funding Information: We thank I. Inoue for stimulating discussion. We acknowledge experimental support from Ube Industries, Ltd. This research has been partly carried out at the Fundamental Technology Center, Research Institute of Electrical Communication, Tohoku University. This work was supported by a Grants-in-Aid for Scientific Research (no. 15K13652) and a Grand-in-Aid for Scientific Research on Innovative Areas ({\textquoteleft}π-System Figuration{\textquoteright} Area 2601, no. 15H00983) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan, “Elements Strategy Initiative for Catalysts & Batteries (ESICB){"} supported by MEXT program {\textquoteleft}Elements Strategy Initiative to Form Core Research Center{\textquoteright} (since 2012) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan, the E-IMR project, the ICC-IMR, FRIS project, and the Asahi Glass Foundation, and Mitsubishi Foundation and Hatakeyama Cultural Foundation. Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd. All rights reserved.",
year = "2016",
month = aug,
day = "20",
doi = "10.1016/j.electacta.2016.05.202",
language = "English",
volume = "210",
pages = "655--661",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",
}