TY - JOUR
T1 - Electrodeposited Co0.85Se thin films as free-standing cathode materials for high-performance hybrid supercapacitors
AU - Mondal, Aniruddha
AU - Lee, Chuan Yi
AU - Chang, Hu
AU - Hasin, Panitat
AU - Yang, Chii Rong
AU - Lin, Jeng Yu
N1 - Funding Information:
The authors would like to thank the Ministry of Science and Technology Taiwan for the financial support (Project numbers: 107-2221-E-036-007-MY3 and 109-2923-E-036-001-MY3 ). The authors also acknowledge Ms. Su-Jen Ji of Ministry of Science and Technology for the assistance in FE-SEM experiments.
Publisher Copyright:
© 2021 Taiwan Institute of Chemical Engineers
PY - 2021/4
Y1 - 2021/4
N2 - In this study, Co0.85Se thin film of monodispersed morphology with interconnected and opened porous structure was successfully prepared via a facile electrodeposition method and employed as a free-standing cathode material in hybrid supercapacitors (HSCs). After the optimization of the applied potential for Co0.85Se electrodeposition, the Co0.85Se electrode prepared at -0.7 V vs. Ag/AgCl showed the most excellent electrochemical properties among all the electrodeposited Co0.85Se electrodes, which can be ascribed to its monodispersed morphology with interconnected porous nature. Moreover, the HSC based on the optimized Co0.85Se cathode was delivered outstanding electrochemical behavior, especially with regards to an impressive specific capacity of 16.47 mAh g − 1 and 12.21 mAh g − 1 at the current density of 1 A g − 1 and 8 A g − 1, respectively. Additionally, the HSC device exhibited the maximum energy density of 23.95 Wh kg−1 at a power density of 800 W kg−1. Most importantly, the capacitive retention of 97.1% was reached even after the floating test for 48 h, demonstrating its outstanding electrochemical stability. As a result, the electrodeposited Co0.85Se thin film could be regarded as one of the promising free-standing cathode materials for high-performance HSCs.
AB - In this study, Co0.85Se thin film of monodispersed morphology with interconnected and opened porous structure was successfully prepared via a facile electrodeposition method and employed as a free-standing cathode material in hybrid supercapacitors (HSCs). After the optimization of the applied potential for Co0.85Se electrodeposition, the Co0.85Se electrode prepared at -0.7 V vs. Ag/AgCl showed the most excellent electrochemical properties among all the electrodeposited Co0.85Se electrodes, which can be ascribed to its monodispersed morphology with interconnected porous nature. Moreover, the HSC based on the optimized Co0.85Se cathode was delivered outstanding electrochemical behavior, especially with regards to an impressive specific capacity of 16.47 mAh g − 1 and 12.21 mAh g − 1 at the current density of 1 A g − 1 and 8 A g − 1, respectively. Additionally, the HSC device exhibited the maximum energy density of 23.95 Wh kg−1 at a power density of 800 W kg−1. Most importantly, the capacitive retention of 97.1% was reached even after the floating test for 48 h, demonstrating its outstanding electrochemical stability. As a result, the electrodeposited Co0.85Se thin film could be regarded as one of the promising free-standing cathode materials for high-performance HSCs.
KW - Cathode
KW - Cobalt selenide
KW - Free-standing
KW - Hybrid supercapacitor
KW - Potentiostatic deposition
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U2 - 10.1016/j.jtice.2021.04.017
DO - 10.1016/j.jtice.2021.04.017
M3 - Article
AN - SCOPUS:85105164396
SN - 1876-1070
VL - 121
SP - 205
EP - 216
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
ER -