H Vijeth, S P Ashokkumar, L Yesappa, M Niranjana, M Vandana, H Devendrappa
Department of Physics, Mangalore University Mangalagangothri 574199 India
RSC Adv. 2018 Sep 7;8(55):31414-31426. doi: 10.1039/c8ra06102e. eCollection 2018 Sep 5.
An asymmetric supercapacitor (ASC) was constructed using a polythiophene/aluminium oxide (PTHA) nanocomposite as an anode electrode and charcoal as a cathode electrode. The highest specific capacitance ( ) of the PTHA electrode was found to be 554.03 F g at a current density (CD) of 1 A g and that of the charcoal electrode was 374.71 F g at 1.4 A g, measured using a three electrode system. The maximum obtained for the assembled PTHA//charcoal asymmetric supercapacitor (ASC) was 265.14 F g at 2 A g. It also showed a high energy density of 42.0 W h kg at a power density of 735.86 W kg and capacitance retention of 94.61% even after 2000 cycles. Moreover, it is worth mentioning that the asymmetric device was used to illuminate a light emitting diode (LED) for more than 15 minutes. This PTHA//charcoal ASC also possesses stable electrochemical properties in different bending positions and hence finds a promising application in flexible, wearable and portable energy storage electronic devices.
使用聚噻吩/氧化铝（PTHA）纳米复合材料作为阳极电极，活性炭作为阴极电极构建了一种不对称超级电容器（ASC）。使用三电极系统测量发现，PTHA电极在电流密度（CD）为1 A g时的最高比电容（ ）为554.03 F g，活性炭电极在1.4 A g时的比电容为374.71 F g。组装的PTHA//活性炭不对称超级电容器（ASC）在2 A g时获得的最大 为265.14 F g。它在功率密度为735.86 W kg时还显示出42.0 W h kg的高能量密度，即使在2000次循环后电容保持率仍为94.61%。此外，值得一提的是，该不对称器件能够为发光二极管（LED）供电超过15分钟。这种PTHA//活性炭ASC在不同弯曲位置也具有稳定的电化学性能，因此在柔性、可穿戴和便携式储能电子设备中具有广阔的应用前景。
