TY - JOUR
T1 - Two dimensional layered nickel cobaltite nanosheets as an efficient electrode material for high-performance hybrid supercapacitor
AU - Sivakumar, Periyasamy
AU - Raj, Chellan Justin
AU - Opar, David Odhiambo
AU - Park, Jeong Won
AU - Jung, Hyun
N1 - Publisher Copyright:
© 2021 John Wiley & Sons Ltd.
PY - 2021/9
Y1 - 2021/9
N2 - Nickel cobalt oxide (NCO) is considered an auspicious electrode candidate for the reinforcement of energy-storage devices. Currently, an immense interest is devoted to modifying the morphological aspects of the NCO to boost their surface texture and electrochemical performances, which is feasible for the development of high energy density and durable devices. Herein, we report the synthesis of layered NCO nanosheets via solvothermal reaction by tuning the solvent volume ratio (water/N,N-Dimethylformamide [DMF]) for supercapacitor electrode material. The nickel cobalt oxide is prepared utilizing a 1:2 (DMF:water) ratio of solvent (NCO1) displays a controlled growth of 2D nanosheets with excellent surface texture. Moreover, NCO1 demonstrates the battery type charge storage properties with a maximum specific capacitance (Csp) of 731 F g−1, which is far better than NCO2 (623 F g−1) and NCO3 (556 F g−1) prepared in other solvent proportions. Besides, the constructed hybrid supercapacitor utilizing activated carbon (AC) and NCO1 as the negative and positive electrodes, respectively, exhibits the Csp of 120 F g−1, and maximum specific energy 37.33 W h kg−1 for the specific power 691.31 W kg−1 and demonstrates excellent stability ~80.56% for 20 000 cycles.
AB - Nickel cobalt oxide (NCO) is considered an auspicious electrode candidate for the reinforcement of energy-storage devices. Currently, an immense interest is devoted to modifying the morphological aspects of the NCO to boost their surface texture and electrochemical performances, which is feasible for the development of high energy density and durable devices. Herein, we report the synthesis of layered NCO nanosheets via solvothermal reaction by tuning the solvent volume ratio (water/N,N-Dimethylformamide [DMF]) for supercapacitor electrode material. The nickel cobalt oxide is prepared utilizing a 1:2 (DMF:water) ratio of solvent (NCO1) displays a controlled growth of 2D nanosheets with excellent surface texture. Moreover, NCO1 demonstrates the battery type charge storage properties with a maximum specific capacitance (Csp) of 731 F g−1, which is far better than NCO2 (623 F g−1) and NCO3 (556 F g−1) prepared in other solvent proportions. Besides, the constructed hybrid supercapacitor utilizing activated carbon (AC) and NCO1 as the negative and positive electrodes, respectively, exhibits the Csp of 120 F g−1, and maximum specific energy 37.33 W h kg−1 for the specific power 691.31 W kg−1 and demonstrates excellent stability ~80.56% for 20 000 cycles.
KW - 2D nanosheet
KW - energy storage
KW - hybrid supercapacitor
KW - NiCoO
KW - solvothermal
UR - http://www.scopus.com/inward/record.url?scp=85105452820&partnerID=8YFLogxK
U2 - 10.1002/er.6845
DO - 10.1002/er.6845
M3 - Article
AN - SCOPUS:85105452820
SN - 0363-907X
VL - 45
SP - 16134
EP - 16144
JO - International Journal of Energy Research
JF - International Journal of Energy Research
IS - 11
ER -