2013
DOI: 10.1021/am302647w
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Polyviologen Hydrogel with High-Rate Capability for Anodes toward an Aqueous Electrolyte-Type and Organic-Based Rechargeable Device

Abstract: 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,… Show more

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Cited by 109 publications
(108 citation statements)
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“…From this linear dependence, the diffusion constants of radicals 1-3 were estimated as about 10 À10 cm 2 s À1 , which is very close to that of nitroxide radicals (about 10 À10 cm 2 s À1 ). [14] These radical compounds exhibited much larger diffusion constants than those of the cathode-active materials commonly used in lithium-ion batteries (about 10 À14 cm 2 s À1 ), [15] suggesting that radicals 1-3 may possess high power and rapid charge-discharge properties. The peak separations at the same sweep rate followed the order 3 > 2 > 1, implying that the reduction and oxidation reaction rates followed the reverse order, 1 > 2 > 3.…”
mentioning
confidence: 99%
“…From this linear dependence, the diffusion constants of radicals 1-3 were estimated as about 10 À10 cm 2 s À1 , which is very close to that of nitroxide radicals (about 10 À10 cm 2 s À1 ). [14] These radical compounds exhibited much larger diffusion constants than those of the cathode-active materials commonly used in lithium-ion batteries (about 10 À14 cm 2 s À1 ), [15] suggesting that radicals 1-3 may possess high power and rapid charge-discharge properties. The peak separations at the same sweep rate followed the order 3 > 2 > 1, implying that the reduction and oxidation reaction rates followed the reverse order, 1 > 2 > 3.…”
mentioning
confidence: 99%
“…dation while in the charged state. [12] Viologen redox-active polymers are expected to eject counterions during reduction [51,52] and our results could be explained as a higher difficulty for ion reentry during re-oxidation. For these measurements, only the peak intensity for the strongest peak, 1530 cm À1 , was tracked with a 5 s acquisition time.…”
Section: Raman Spectroscopy On Few Racsmentioning
confidence: 61%
“…In last few years, researchers have developed different derivatives of polymers bearing viologen side groups by playing with synthesis methods [10]. Polyviologen materials possess viologen as repeating unit in its backbone which might be helpful in exploring wideranging applications related to viologen materials [11,12]. Researchers have also synthesized viologen precursors which have been functionalized with conjugated groups in order to provide some conducting properties to the resulting structure [13,14].…”
Section: Introductionmentioning
confidence: 99%