Acetylene black enhancing the electrochemical performance of NiCo-MOF nanosheets for supercapacitor electrodes

By Yuexin Liu, Yanzhong Wang, Huiqi Wang, P. Zhao, Hua Hou, Li Guo. Applications of Surface Science, 2019

179 citations recorded by the source corpus.

Abstract Due to the large specific surface area and potential redox sites, metal organic frameworks (MOFs) are considered as a promising electrode material for supercapacitors. However, the low electrical conductivity of MOFs impedes their application in supercapacitors. Here, the NiCo-MOF/acetylene black composites were facily fabricated by an ultrasonic method, in which acetylene black was uniformly distributed between NiCo-MOF nanosheets and formed a conductive network, thus improving the electrical conductivity of NiCo-MOF as well as hindering their aggregation. The as-obtained NiCo-MOF/acetylene black composites exhibit high specific capacitance of 916.1 F g −1 , remarkable rate capability and cycling stability compare to the pure NiCo-MOF. In addition, an asymmetrical supercapacitor were also constructed, which achieved a maximum energy density of 33.84 Wh kg −1 at a power density of 750 W kg −1 and good cycling stability with 85.25% of initial capacitance after 5000 cycles.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/62295962c2a8f603a0629ca8f16c5f6eb9bba811