TY - JOUR
T1 - Synergistic integration of three-dimensional architecture composed of two-dimensional nanostructure ternary metal oxide for high-performance hybrid supercapacitors
AU - Sivakumar, Periyasamy
AU - Jung, Min Gyu
AU - Raj, C. Justin
AU - Park, Ho Seok
N1 - Publisher Copyright:
© 2021 John Wiley & Sons Ltd.
PY - 2021/12
Y1 - 2021/12
N2 - Constructing electroactive materials with hierarchically structured porous architecture is promising for developing various energy storage electrodes. In particular, the transition metal complexes with this archistructure are potential toward the fabrication of high-performance hybrid supercapacitors (HSCs) due to the rational design and its peculiar Faradic battery-type charge storage behavior. Herein, we report the hierarchically structured microflowers of ternary nickel cobalt molybdenum oxide (NCMO) assembled by ultrathin nanosheets via a hydrothermal process and the subsequent calcination. The interconnected open network and abundant void space of hierarchically structured flower-like NCMO are associated with improved electrochemical performance. Consequently, the obtained NCMO electrode achieves the larger specific capacitance (Cs) of 1696 F g−1 at 1 A g−1 than the nickel molybdenum oxide (NMO; 878 F g−1), cobalt molybdenum oxide (CMO; 690 F g−1), NiO (350 F g−1), and Co3O4 (259 F g−1) electrodes, respectively. The electrochemical performances of HSCs, configured using the hierarchically structured ternary NCMO microflower and activated carbon (AC), respectively, are optimized by varying mass ratios of two electrodes. In particular, the NCMO//AC HSCs with 1:3 (D13) mass ratio exhibit the maximum energy and power densities of 51.22 W h kg−1 and 41.67 kW kg−1 with the high-capacitance retention of 89.29% over 20 000 cycles.
AB - Constructing electroactive materials with hierarchically structured porous architecture is promising for developing various energy storage electrodes. In particular, the transition metal complexes with this archistructure are potential toward the fabrication of high-performance hybrid supercapacitors (HSCs) due to the rational design and its peculiar Faradic battery-type charge storage behavior. Herein, we report the hierarchically structured microflowers of ternary nickel cobalt molybdenum oxide (NCMO) assembled by ultrathin nanosheets via a hydrothermal process and the subsequent calcination. The interconnected open network and abundant void space of hierarchically structured flower-like NCMO are associated with improved electrochemical performance. Consequently, the obtained NCMO electrode achieves the larger specific capacitance (Cs) of 1696 F g−1 at 1 A g−1 than the nickel molybdenum oxide (NMO; 878 F g−1), cobalt molybdenum oxide (CMO; 690 F g−1), NiO (350 F g−1), and Co3O4 (259 F g−1) electrodes, respectively. The electrochemical performances of HSCs, configured using the hierarchically structured ternary NCMO microflower and activated carbon (AC), respectively, are optimized by varying mass ratios of two electrodes. In particular, the NCMO//AC HSCs with 1:3 (D13) mass ratio exhibit the maximum energy and power densities of 51.22 W h kg−1 and 41.67 kW kg−1 with the high-capacitance retention of 89.29% over 20 000 cycles.
KW - 2D nanosheet
KW - 3D flower
KW - energy storage
KW - hybrid supercapacitor
KW - ternary metal oxides
UR - http://www.scopus.com/inward/record.url?scp=85112695157&partnerID=8YFLogxK
U2 - 10.1002/er.7170
DO - 10.1002/er.7170
M3 - Article
AN - SCOPUS:85112695157
SN - 0363-907X
VL - 45
SP - 21170
EP - 21181
JO - International Journal of Energy Research
JF - International Journal of Energy Research
IS - 15
ER -