Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 19, Pages 6747-6754Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta14920j
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, MEXT program Elements Strategy Initiative to Form Core Research Center [20110006, 23550155]
- Grants-in-Aid for Scientific Research [23550155] Funding Source: KAKEN
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Pentakis-fused TTF derivatives extended with two cyclohexene-1,4-diylidenes (2a and 2b) have been successfully synthesized. Cyclic voltammetry of the tetrakis(2-ethylhexylthio) derivative (2b) has revealed that it exhibits five stages of the redox process to form 2b(10+). A coin-type cell composed of a positive electrode incorporating the tetrakis(methylthio) derivative (2a) exhibits a discharge capacity of 196 mA h g(-1), which corresponds to participation of a ten electron redox. It shows a high performance of energy density of 700 mW h g(-1) and an output power density of 69 W g(-1) with a relatively stable cycle-life performance (72% of the initial discharge capacity after 30 cycles).
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