Quantifying TEMPO Redox Polymer Charge Transport toward the Organic Radical Battery
Quantifying TEMPO Redox Polymer Charge Transport toward the Organic Radical Battery
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DOI：
10.1021/acsami.7b00403
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发表时间：
2017-03-29
影响因子：
9.5
通讯作者：
Nishide, Hiroyuki
中科院分区：
文献类型：
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作者：
Karlsson, Christoffer;Suga, Takeo;Nishide, Hiroyuki
为了合理地设计新的、更好的有机活性电池材料，必须对电荷输运的基本参数进行研究。本文报道了含TEMPO的氧化还原聚合物中电子扩散的电子导电性，并首次确定了TEMPO在有机溶剂中自交换的重组能。E-0时的电导率为8.5 μ S/cm，符合氧化还原跳变机制。室温下电子表观扩散系数为1.9 × 10(-9) cm(2)/s，短时间内离子扩散极限为6.5 × 10(-10) cm(2)/s。重组能为1.01 eV，表明TEMPO基团具有较强的极性化学环境。讨论了这类材料在有机储能中的应用。通过10克的导电性，我们证明，如果能够确保足够的膨胀性，电荷可以在没有任何导电添加剂的情况下通过电池电极中几微米厚的层传输。
To, design new and better organic active battery materials in a rational fashion, fundamental parameters of the charge transport must be studied. Herein we report on the electronic conductivity by electron diffusion in a TEMPO-containing redox polymer, and the reorganization energy of the TEMPO self exchange in an organic solvent is determined for the first time. The electronic conductivity was 8.5 mu S/cm at E-0 and corresponded to a redox hopping mechanism. The apparent electron diffusion coefficient was 1.9 x 10(-9) cm(2)/s at room temperature, and at short times the ion diffusion was limiting with a diffusion coefficient of 6.5 x 10(-10) cm(2)/s. The reorganization energy was determined to be 1.01 eV, indicating a rather polar chemical environment for the TEMPO groups. The implications for the usage of this type of materials in organic energy storage are discussed. As conductivity through 10 gm was demonstrated, we show that, if sufficient swellability can be ensured) charge can be transported through several micrometer thick layers in a battery electrode without any conducting additive.