TY - JOUR
T1 - Unveiling the redox electrochemical kinetics of interconnected wrinkled microspheres of binary Cu2-xSe/Ni1-xSe as battery-type electrode for advanced supercapatteries
AU - Karuppasamy, K.
AU - Vikraman, Dhanasekaran
AU - Bose, Ranjith
AU - Hussain, Sajjad
AU - Santhoshkumar, P.
AU - Manikandan, Ramu
AU - Jung, Jongwan
AU - Alameri, Saeed
AU - Alfantazi, Akram
AU - Kim, Hyun Seok
N1 - Publisher Copyright:
© 2023 Elsevier Inc.
PY - 2024/1/15
Y1 - 2024/1/15
N2 - Developing a rational design of nanoarchitechtures with excellent electrochemical behaviors is an ultimate and unique strategy to enhance the redox electrokinetics of battery-type electrode materials. Herein, we demonstrate a hierarchical composite comprising interconnected wrinkled micro-solid sphere (ICWMS)-like binary copper selenide/nickel selenide over nickel foam (Cu2-xSe/Ni1-xSe/NF) prepared via a wet chemical synthetic protocol and utilized as an effective positrode for improved supercapaterry performance. The binary Cu2-xSe/Ni1-xSe/NF electrode considerably improved the electroactive surface area and facilitated ultrafast redox electrochemistry in an alkaline electrolyte medium. Remarkably, the binary Cu2-xSe/Ni1-xSe/NF electrode afforded the highest specific capacity of 368 ± 1C/g at 1 A/g greater than that of pristine single selenide electrodes (Cu2Se and NiSe) in a three-electrode setup which might be attributed to its large surface area, synergism between Ni and Cu, and specific morphology. Moreover, a coin cell supercapattery with the binary Cu2-xSe/Ni1-xSe/NF positrode and a porous activated carbon-on-nickel-foam negatrode was constructed, which exhibited excellent energy-storage characteristics in terms of capacity (87.5 ± 1 mAh/g), specific energy (39.3 Wh kg−1), specific power (450 W kg−1), and capacity retention (91.8 %). This simple fabrication approach of hierarchically designed Cu2-xSe/Ni1-xSe/NF paves the way for utilizing it as the promising positrode for high-performance supercapattery.
AB - Developing a rational design of nanoarchitechtures with excellent electrochemical behaviors is an ultimate and unique strategy to enhance the redox electrokinetics of battery-type electrode materials. Herein, we demonstrate a hierarchical composite comprising interconnected wrinkled micro-solid sphere (ICWMS)-like binary copper selenide/nickel selenide over nickel foam (Cu2-xSe/Ni1-xSe/NF) prepared via a wet chemical synthetic protocol and utilized as an effective positrode for improved supercapaterry performance. The binary Cu2-xSe/Ni1-xSe/NF electrode considerably improved the electroactive surface area and facilitated ultrafast redox electrochemistry in an alkaline electrolyte medium. Remarkably, the binary Cu2-xSe/Ni1-xSe/NF electrode afforded the highest specific capacity of 368 ± 1C/g at 1 A/g greater than that of pristine single selenide electrodes (Cu2Se and NiSe) in a three-electrode setup which might be attributed to its large surface area, synergism between Ni and Cu, and specific morphology. Moreover, a coin cell supercapattery with the binary Cu2-xSe/Ni1-xSe/NF positrode and a porous activated carbon-on-nickel-foam negatrode was constructed, which exhibited excellent energy-storage characteristics in terms of capacity (87.5 ± 1 mAh/g), specific energy (39.3 Wh kg−1), specific power (450 W kg−1), and capacity retention (91.8 %). This simple fabrication approach of hierarchically designed Cu2-xSe/Ni1-xSe/NF paves the way for utilizing it as the promising positrode for high-performance supercapattery.
KW - Capacity
KW - Copper selenide
KW - Long-term stability
KW - Redox electrochemistry
KW - Supercapattery
UR - http://www.scopus.com/inward/record.url?scp=85175020998&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2023.10.107
DO - 10.1016/j.jcis.2023.10.107
M3 - Article
AN - SCOPUS:85175020998
SN - 0021-9797
VL - 654
SP - 1098
EP - 1110
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -