1 research outputs found
Polyviologen Hydrogel with High-Rate Capability for Anodes toward an Aqueous Electrolyte-Type and Organic-Based Rechargeable Device
A highly cross-linked polyviologen hydrogel, polyÂ(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 polyÂ(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