Anode Material
Associated with Polymeric Networking
of Triflate Ions Formed on Mg
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Abstract
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(CF<sub>3</sub>SO<sub>3</sub>)<sub>2</sub> and <i>N</i>-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 (CF<sub>3</sub>SO<sub>3</sub><sup>–</sup>) 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