TY - JOUR
T1 - A new path to high-performance supercapacitors
T2 - Utilizing Ag-embedded CoFe-phosphate and Ti3C2 MXene as hybrid electrodes
AU - Beknalkar, Sonali Ajay
AU - Teli, Aviraj Mahadev
AU - Khot, Atul Chandrakant
AU - Dongale, Tukaram Dattatray
AU - Yewale, Manesh Ashok
AU - Nirmal, Kiran Arun
AU - Shin, Jae Cheol
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/11/15
Y1 - 2023/11/15
N2 - This study addresses the issue of poor performance in assembled supercapacitor devices, which is attributed to the slow kinetics and structural instability of positive electrodes and the lower capacitance of carbon-based negative electrodes. To address this challenge, the authors propose a sustainable solution that involves using Ag-embedded CoFe-phosphate (CFPAg) and Ti3C2 MXene as positive and negative electrodes, respectively, to create a hybrid supercapacitor (HS) device. The CFPAg electrode, made up of porous nanoflakes decorated with nanospheres of CoFe-phosphate material, is deposited on Ni-foam without the need of a binder, using a simple hydrothermal method. The MXene electrode is chemically synthesized and deposited on Ni-foam as the negative electrode. The results of the electrochemical study show that the CFPAg electrode exhibits a specific capacity of 1021 mF/cm2 with 80.5 % cyclic stability over 10,000 cycles, while the MXene electrode shows a specific capacity of 177.6 mF/cm2 with a cyclability of 84.7% over 10,000 cycles. The HS device, fabricated using CFPAg and MXene electrodes, displays an areal capacitance of 79.6 mF/cm2 and provides excellent cyclic stability of 96% over approximately 39,000 cycles. It also exhibits a high energy density of 24.7 μWh/cm2 at a power density of 0.75 mW/cm2 when measured at 2 mA/cm2 applied current density. This work serves as a foundation for developing a range of electrode materials for next-generation energy storage devices, providing a sustainable and effective solution to improve supercapacitor device performance and longevity.
AB - This study addresses the issue of poor performance in assembled supercapacitor devices, which is attributed to the slow kinetics and structural instability of positive electrodes and the lower capacitance of carbon-based negative electrodes. To address this challenge, the authors propose a sustainable solution that involves using Ag-embedded CoFe-phosphate (CFPAg) and Ti3C2 MXene as positive and negative electrodes, respectively, to create a hybrid supercapacitor (HS) device. The CFPAg electrode, made up of porous nanoflakes decorated with nanospheres of CoFe-phosphate material, is deposited on Ni-foam without the need of a binder, using a simple hydrothermal method. The MXene electrode is chemically synthesized and deposited on Ni-foam as the negative electrode. The results of the electrochemical study show that the CFPAg electrode exhibits a specific capacity of 1021 mF/cm2 with 80.5 % cyclic stability over 10,000 cycles, while the MXene electrode shows a specific capacity of 177.6 mF/cm2 with a cyclability of 84.7% over 10,000 cycles. The HS device, fabricated using CFPAg and MXene electrodes, displays an areal capacitance of 79.6 mF/cm2 and provides excellent cyclic stability of 96% over approximately 39,000 cycles. It also exhibits a high energy density of 24.7 μWh/cm2 at a power density of 0.75 mW/cm2 when measured at 2 mA/cm2 applied current density. This work serves as a foundation for developing a range of electrode materials for next-generation energy storage devices, providing a sustainable and effective solution to improve supercapacitor device performance and longevity.
KW - Asymmetric device
KW - CFPAg
KW - Hydrothermal route
KW - TiC Mxene
UR - http://www.scopus.com/inward/record.url?scp=85164683159&partnerID=8YFLogxK
U2 - 10.1016/j.est.2023.108272
DO - 10.1016/j.est.2023.108272
M3 - Article
AN - SCOPUS:85164683159
SN - 2352-152X
VL - 72
JO - Journal of Energy Storage
JF - Journal of Energy Storage
M1 - 108272
ER -