Quantifying TEMPO Redox Polymer Charge Transport toward the Organic Radical Battery

Christoffer Karlsson*, Takeo Suga, Hiroyuki Nishide

*この研究の対応する著者

研究成果: Article査読

40 被引用数 (Scopus)

抄録

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 μS/cm at E0 and corresponded to a redox hopping mechanism. The apparent electron diffusion coefficient was 1.9 × 10-9 cm2/s at room temperature, and at short times the ion diffusion was limiting with a diffusion coefficient of 6.5 × 10-10 cm2/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 μm 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.

本文言語English
ページ(範囲)10692-10698
ページ数7
ジャーナルACS Applied Materials and Interfaces
9
12
DOI
出版ステータスPublished - 2017 3月 29

ASJC Scopus subject areas

  • 材料科学(全般)

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