TY - JOUR
T1 - Designing CoS2-Mo2C and CoS2-W2C hybrids for high-performance supercapacitors and hydrogen evolution reactions
AU - Hussain, Sajjad
AU - Aftab, Sikandar
AU - Abbas, Zeesham
AU - Hussain, Iftikhar
AU - Shaikh, Shoyebmohamad F.
AU - Karuppasamy, K.
AU - Kim, Hyun Seok
AU - Jung, Jongwan
AU - Vikraman, Dhanasekaran
N1 - Publisher Copyright:
© 2024 The Royal Society of Chemistry.
PY - 2024/5/20
Y1 - 2024/5/20
N2 - The ever-increasing obligation of green and sustainable energy has intensified rigorous research on improving efficient electrochemical energy transition and storage systems. Herein, CoS2 prickly-pear-like sheet-intermingled metal carbide (Mo2C and W2C) hybrids were synthesized using a facile hydrothermal method. The fabricated hierarchical CoS2-W2C and CoS2-Mo2C hybrid structures were explored for their pseudo-capacitive behaviour by half-cell studies with specific capacities of 720 and 380 C g−1 at 2 A g−1, respectively, with great cycling stability. The synthesized CoS2-W2C and CoS2-Mo2C hybrid asymmetric supercapacitors demonstrated an elevated specific capacitance, reaching 423 F g−1 at a current density of 2 A g−1 within an extended voltage range of 1.6 V. Additionally, the highest energy density of 150 W h kg−1 was achieved at a maximum power density of 4.5 kW kg−1 along with a superior capacitance retention of 94.1% after 5000 cycles. As hydrogen evolution catalysts, the CoS2-W2C hybrid required small overpotentials of 50 and 42 mV, whereas the CoS2-Mo2C hybrid required 54 and 50 mV to deliver 10 mA cm−2 current density in acid and KOH solution, respectively. This study related to metal carbide-interconnected metal sulfide provides a promising opportunity for the fabrication/design and application of multifunctional electrocatalysts.
AB - The ever-increasing obligation of green and sustainable energy has intensified rigorous research on improving efficient electrochemical energy transition and storage systems. Herein, CoS2 prickly-pear-like sheet-intermingled metal carbide (Mo2C and W2C) hybrids were synthesized using a facile hydrothermal method. The fabricated hierarchical CoS2-W2C and CoS2-Mo2C hybrid structures were explored for their pseudo-capacitive behaviour by half-cell studies with specific capacities of 720 and 380 C g−1 at 2 A g−1, respectively, with great cycling stability. The synthesized CoS2-W2C and CoS2-Mo2C hybrid asymmetric supercapacitors demonstrated an elevated specific capacitance, reaching 423 F g−1 at a current density of 2 A g−1 within an extended voltage range of 1.6 V. Additionally, the highest energy density of 150 W h kg−1 was achieved at a maximum power density of 4.5 kW kg−1 along with a superior capacitance retention of 94.1% after 5000 cycles. As hydrogen evolution catalysts, the CoS2-W2C hybrid required small overpotentials of 50 and 42 mV, whereas the CoS2-Mo2C hybrid required 54 and 50 mV to deliver 10 mA cm−2 current density in acid and KOH solution, respectively. This study related to metal carbide-interconnected metal sulfide provides a promising opportunity for the fabrication/design and application of multifunctional electrocatalysts.
UR - http://www.scopus.com/inward/record.url?scp=85194936916&partnerID=8YFLogxK
U2 - 10.1039/d4qi00759j
DO - 10.1039/d4qi00759j
M3 - Article
AN - SCOPUS:85194936916
SN - 2052-1545
VL - 11
SP - 4001
EP - 4018
JO - Inorganic Chemistry Frontiers
JF - Inorganic Chemistry Frontiers
IS - 13
ER -