Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
J Am Chem Soc. 2011 Dec 14;133(49):19839-43. doi: 10.1021/ja206961t. Epub 2011 Nov 15.
A layer of poly(2-vinylanthraquinone) on current collectors underwent reversible electrode reaction at -0.82 V vs Ag/AgCl in an aqueous electrolyte. A repeatable charging/discharging cycles with a redox capacity comparable to the formula weight-based theoretical density at the negative potential suggested that all of the anthraquinone pendants in the layer was redox-active, that electroneutralization by an electrolyte cation was accomplished throughout the polymer layer, and that the layer stayed on the current collector without exfoliation or dissolution into the electrolyte during the electrolysis. The charging/discharging behavior of the polymer layer in the aqueous electrolyte revealed the capability of undergoing electrochemistry even in the nonsolvent of the pendant group, which offered insight into the nature of the anthraquinone pendants populated on the aliphatic chain. Charging/discharging capability of air batteries was accomplished by using the polymer layer as an organic anode-active material. A test cell fabricated using the conventional MnO(2)/C cathode catalyst exhibited a discharging voltage at 0.63 V corresponding to their potential gap and a charging/discharging cycle of more than 500 cycles without loss of the capacity.
在水溶液电解质中，集流器上的聚（2-乙烯基蒽醌）层在-0.82 V 对 Ag/AgCl 发生可逆电极反应。在负电势下，具有与基于公式重量的理论密度相当的氧化还原容量的可重复充放电循环表明，层中的所有蒽醌侧基均具有氧化还原活性，通过电解质阳离子实现了整个聚合物层的电中性，并且在电解质中没有剥落或溶解到电解质中，聚合物层留在集流器上在电解过程中。聚合物层在水溶液电解质中的充放电行为揭示了即使在侧基的非溶剂中也能进行电化学的能力，这为了解在脂肪链上存在的蒽醌侧基的性质提供了线索。空气电池的充电/放电能力是通过将聚合物层用作有机阳极活性材料来实现的。使用常规的 MnO2/C 阴极催化剂制造的测试电池在 0.63 V 时显示出放电电压，这与它们的电位间隙相对应，并且在不损失容量的情况下，充放电循环超过 500 次。
