Electrolyte anion-assisted charge transportation in poly(oxoammonium cation/nitroxyl radical) redox gels
Electrolyte anion-assisted charge transportation in poly(oxoammonium cation/nitroxyl radical) redox gels
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DOI：
10.1039/c2jm31907a
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Nishide, Hiroyuki
中科院分区：
文献类型：
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作者：
Nakahara, Kentaro;Oyaizu, Kenichi;Nishide, Hiroyuki
通过制备体积固体凝胶，在无体积变化的无限扩散模型和扩散距离限制的条件下，采用计时电流法研究了聚氧铵离子/硝基自由基氧化还原凝胶中的电荷输运。发现氧化还原凝胶中的电荷传输主要受电解质阴离子的迁移率而不是氧化还原中心的浓度控制。此外，估计氧化还原凝胶的离子电导率几乎是液体电解质的三分之一。结果表明，凝胶中离子电导率越大，电荷通过氧化还原中心的传输速度越快。
Charge transport in poly(oxoammonium cation/nitroxyl radical) redox gels was investigated by chronoamperometry on the basis of an infinite-diffusion model without a volume change during the redox reaction and a limit of the diffusion distance by means of fabricating the bulk solid gels. Charge transportation in the redox gels was found to be dominated by the mobility of electrolyte anion rather than the concentration of redox centers. Furthermore, the ionic conductivity of the redox gel was estimated to be almost one third of that of the liquid electrolyte. The result indicates that larger ionic conductivity in the gel also brings faster charge transportation through the redox centers.