Anode Material Associated with Polymeric Networking of Triflate Ions Formed on Mg

• Published in: Journal of physical chemistry. C Vol. 119; no. 7; pp. 3488 - 3494
• Main Authors: Shiga, Tohru, Kato, Yuichi, Inoue, Masae, Takahashi, Naoko, Hase, Yoko
• Format: Journal Article
• Language: English
• Published: American Chemical Society 19.02.2015
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp5114015

We have examined anode materials with anions as an ion transport species to solve metal deposition in rechargeable batteries intrinsically. Mg deposition-dissolution tests were conducted using some ionic liquid electrolytes at 60 °C, and a new electrochemical reaction was observed in addition to Mg deposition and dissolution in an electrolyte of Mg(CF3SO3)2 and N-methyl-N-propylpiperidinium bis(trifluoromethane sulfonyl)amide. The reaction was determined to be based on the formation and release of a polymeric network of triflate ions (CF3SO3 –) on the Mg metal surface, which suggests a novel anode material with anion carriers. An anion battery is also demonstrated using this phenomenon and incorporating an acrylate polymer with 2,2,6,6-tetramethylpiperidine-oxyl side units in the cathode to provide evidence of the rechargeability by the intermediary anion carrier.