期刊
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
卷 11, 期 -, 页码 1136-1147出版社
BEILSTEIN-INSTITUT
DOI: 10.3762/bjoc.11.128
关键词
cyclic voltammetry; positive electrode materials; rechargeable battery; redox; tetrathiafulvalene
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [23550155]
- MEXT program Elements Strategy Initiative to Form Core Research Center
- Ehime University
- Grants-in-Aid for Scientific Research [25410068, 15H00948, 15H03798] Funding Source: KAKEN
Derivatives of tris-fused TTF extended with two ethanediylidenes (5), tris-and pentakis-fused TTFs extended with two thiophene-2,5-diylidenes (6-9) were successfully synthesized. Cyclic voltammograms of the tetrakis(n-hexylthio) derivative of 5 and 7 (5d, 7d) consisted of two pairs of two-electron redox waves and two pairs of one-electron redox waves. On the other hand, four pairs of two-electron redox waves and two pairs of one-electron redox waves were observed for the tetrakis(n-hexylthio) derivative of 9 (9d). Coin-type cells using the bis(ethylenedithio) derivatives of 5 (5b), 6 (6b) and the tetrakis(methylthio) derivatives of 5 (5c) and 8 (8c) as positive electrode materials showed initial discharge capacities of 157-190 mAh g(-1) and initial energy densities of 535-680 mAh g(-1). The discharge capacities after 40 cycles were 64-86% of the initial discharge capacities.
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