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 2b10+. 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).
五聚
TTF衍
生物与两个
环己烯-1,4-二亚基(2a和2b)的延伸物已成功合成。四(2-乙基己基
硫)衍
生物(2b)的循环伏安法表明,它表现出五个阶段的氧化还原过程,形成2b10+。由包含四(甲基
硫)衍
生物(2a)的正极组成的硬币型电池的放电容量为196 mA h g-1,相当于参与十个电子的氧化还原反应。它表现出700 mW h g-1的高能量密度和69 W g-1的输出功率密度,具有相对稳定的循环寿命性能(30次循环后为初始放电容量的72%)。