title: Enhanced energy density of a supercapacitor using 2D CoMoO4ultrathin nanosheets and asymmetric configuration.
abstract: Developing a high energy density micro-supercapacitor still remains a big challenge. In this paper, a two-dimensional (2D) CoMoO4ultrathin nanosheet (NS)-based asymmetric supercapacitor (ASC) is fabricated. It is found that the CoMoO4NS electrode processes a high specific capacitance (153.2 F g-1) at a current density of 1 mA cm-2and this ASC can deliver an energy density of 0.313 mWh cm-3at a power density of 80 mW cm-3, which is higher than that reported in the literature. Moreover, the ASC can drive a light emitting diode (3 mm diameter, red) to work for 6 min after being charged for 10 s. After 5000 cycles, 77.37% of capacitance still remains. We maintain that the ultrathin thickness can significantly shorten the diffusion paths for both electrons and ions, thus leading to fast electron transport and ion diffusion rates. Our results demonstrate that 2D ultrathin NSs could be a new, promising candidate for energy conversion/storage devices, which could offer more accommodating sites for ion intercalation.
authors.affiliation: Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM), Nanjing University of Information Sciences & Technology, Nanjing 210044, People's Republic of China. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), Nanjing University of Information Sciences & Technology, Nanjing 210044, People's Republic of China. School of Environmental Science and Engineering, Nanjing University of Information Sciences & Technology, Nanjing 210044, People's Republic of China.
authors.forename: Yunxuan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Zailun
authors.initials: Z
authors.lastname: Liu
authors.forename: Wenhao
authors.initials: W
authors.lastname: Gu
authors.forename: Yifei
authors.initials: Y
authors.lastname: Zhai
authors.forename: Yiran
authors.initials: Y
authors.lastname: Teng
authors.forename: Fei
authors.initials: F
authors.lastname: Teng