期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 4, 页码 1355-1361出版社
AMER CHEMICAL SOC
DOI: 10.1021/am302647w
关键词
rechargeable device; redox polymer; polyviologen; electropolymerization; aqueous electrolyte
资金
- MEXT, Japan [24750113, 24225003]
- Global COE program at Waseda University from MEXT, Japan
- World-Class University (WCU) program at GIST through MEST, Korea [R31-2008-000-10026-0]
- Grants-in-Aid for Scientific Research [24750113, 25288056, 25107733, 24108739] Funding Source: KAKEN
A highly cross-linked polyviologen hydrogel, poly(tripyridiniomesitylene) (PTPM), has been designed as an anode-active material. It displays a reversible two-electron redox capability at -0.4 and -0.8 V vs Ag/AgCl in an aqueous electrolyte. The PTPM layer coated on a current collector by electropolymerization via a 4-cyanopyridinium electro-coupling reaction demonstrates a rapid charging-discharging reaction with a redox capacity comparable to that obtainable using the formula weight-based theoretical density, because of the combination of the redox-active viologen moieties built into the hydrogel. A test cell that has been fabricated using the developed PTPM anode, a poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl acrylamide) (PTAm)-based cathode, and an aqueous electrolyte exhibits a discharging voltage of 1.1 and 1.5 V, and has proven its ability to be recharged more than 2000 times.
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