Mesostructured Carbon Nanotube-on-MnO2 Nanosheet Composite for High-Performance Supercapacitors

• DOI: 10.1021/acsami.8b14109
• Publication Date: 2018-10-24T16:27:07Z
• Authors: Henan Jia; Yifei Cai; Xiaohang Zheng; Jinghuang Lin; Haoyan Liang; Junlei Qi; Jian Cao; Jicai Feng; Weidong Fei
• Keywords: Nanosheet; Nanomaterials; Nanopore; Carbon fibers

Carbon nanomaterials have been widely used to enhance the performance of MnO2-based supercapacitors. However, it still remains a challenge directly fabricate high combining strength, mesostructured and high-performance MnO2/carbon nanotube (CNT)-nanostructured composite electrodes with little weight percentage carbon materials. Here, we report novel CNT-on-MnO2 nanosheet MnO2 percentage, which consists vertically aligned nanosheets nanopores in situ formed oriented CNTs on (tube-on-sheet). The optimized CNTs/MnO2 possesses favorable features, namely, shorted ion diffusion path, hierarchical porous structure for increased specific surface areas active sites, enhanced conductivity robust structural stability. It is found that unique tube-on-sheet nanocomposites (>90 wt %) exhibit capacity 1131 F g-1 based total 1229 at current density 1 A g-1, rate capability, ultrastable cycling life (94.4%@10 000 cycles). This electrode design strategy this paper demonstrates new way supercapacitors material percentage.