Improved conductivity and capacitance of interdigital carbon microelectrodes through integration with carbon nanotubes for micro-supercapacitors
photolithography, supercapacitors, pyrolysis, microelectromechanicalsystem (MEMS), carbon nanotubes
In the last decade, pyrolyzed-carbon-based composites have attracted muchattention for their applications in micro-supercapacitors. Although variousmethods have been investigated to improve the performance of pyrolyzedcarbons, such as conductivity, energy storage density and cycling performance,effective methods for the integration and mass-production of pyrolyzed-carbonbasedcomposites on a large scale are lacking. Here, we report the developmentof an optimized photolithographic technique for the fine micropatterningof photoresist/chitosan-coated carbon nanotube (CHIT-CNT) composite. Aftersubsequent pyrolysis, the fabricated carbon/CHIT-CNT microelectrode-basedmicro-supercapacitor has a high capacitance (6.09 mF·cm–2) and energy density(4.5 mWh·cm–3) at a scan rate of 10 mV·s–1. Additionally, the micro-supercapacitorhas a remarkable long-term cyclability, with 99.9% capacitance retention after10,000 cyclic voltammetry cycles. This design and microfabrication process allowthe application of carbon microelectromechanical system (C-MEMS)-basedmicro-supercapacitors due to their high potential for enhancing the mechanicaland electrochemical performance of micro-supercapacitors.
Tsinghua University Press
Yanjuan Yang,Liang He,Chunjuan Tang,Ping Hu,Xufeng Hong,Mengyu Yan,Yixiao Dong,Xiaocong Tian,Qiulong Wei,Liqiang Mai, Improved conductivity and capacitance of interdigital carbon microelectrodes through integration with carbon nanotubes for micro-supercapacitors. NanoRes.2016, 9(8): 2510–2519