Tris‐Fused Tetrathiafulvalenes Extended with an Anthraquinoid Spacer as New Positive Electrode Materials for Rechargeable Batteries

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  • Daisuke Ogi
    Department of Applied Chemistry Graduate School of Science and Engineering Ehime University 3 Bunkyo‐cho 790‐8577 Matsuyama Japan
  • Yusuke Fujita
    Department of Applied Chemistry Graduate School of Science and Engineering Ehime University 3 Bunkyo‐cho 790‐8577 Matsuyama Japan
  • Minami Kato
    Department of Applied Chemistry Graduate School of Science and Engineering Ehime University 3 Bunkyo‐cho 790‐8577 Matsuyama Japan
  • Tomokazu Yamauchi
    Department of Applied Chemistry Graduate School of Science and Engineering Ehime University 3 Bunkyo‐cho 790‐8577 Matsuyama Japan
  • Takashi Shirahata
    Department of Applied Chemistry Graduate School of Science and Engineering Ehime University 3 Bunkyo‐cho 790‐8577 Matsuyama Japan
  • Masaru Yao
    Research Institute of Electrochemical Energy Graduate School of Science and Engineering National Institute of Advanced Industrial Science and Technology (AIST) 1‐8–31 Midorigaoka 563‐8577 Ikeda, Osaka Japan
  • Yohji Misaki
    Department of Applied Chemistry Graduate School of Science and Engineering Ehime University 3 Bunkyo‐cho 790‐8577 Matsuyama Japan

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<jats:p>Tris‐fused π‐electron donors composed of two tetrathiafulvalenes (TTFs) and one extended TTF with anthraquinoid spacer (<jats:bold>3</jats:bold>) were successfully synthesized. The cyclic voltammograms of the tetrakis(<jats:italic>n</jats:italic>‐hexylthio)‐ and bis(ethylenedioxy) derivatives <jats:bold>3c</jats:bold> and <jats:bold>3d</jats:bold> consisted of three‐pairs of two‐electron redox waves. Spectroelectrochemitry of <jats:bold>3c</jats:bold> indicated that two positive charges in <jats:bold>3c</jats:bold><jats:sup>2+</jats:sup> are located mainly on the central extended TTF moiety. Coin‐type cells composed of the positive electrodes incorporating the unsubstituted‐<jats:bold>3</jats:bold> (<jats:bold>3a</jats:bold>) and <jats:bold>3d</jats:bold> showed the discharge capacities of 192 and 160 mAh g<jats:sup>–1</jats:sup>, respectively, in which six electrons per molecule are involved.</jats:p>

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