TY - JOUR
T1 - 3D self-supported hierarchical lettuce-like Ni3S2 super architecture with an internal nanowire network for high-performance supercapacitors
AU - Mane, Sagar M.
AU - Teli, Aviraj M.
AU - Shin, Jae Cheol
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/5
Y1 - 2022/12/5
N2 - Tremendous efforts are devoted to the rational design of self-supported hierarchical architectures that are capable of delivering ultrahigh areal capacitance, and that are essential for miniaturized energy storage devices. Herein we propose a one-step-solvothermal approach for the hierarchical advancement in the morphology of the Ni3S2 on Ni foam from one-dimensional (1D) nanowires to a three-dimensional lettuce-like architecture with an internal nanowire network and corals at the edges. As the formation of this unique 3D lettuce-like architecture has resulted from the integration of 2D sheets with internal 1D nanowires, the combined features make it possible to realize ultra-high capacitance. This 3D architecture Ni3S2 electrode efficiently offers ultrahigh areal capacitance of 14.64 F cm−2, five times higher than that of nanowire arrays of 2.82 F cm−2 at the higher current density of 10 mA cm−2. A high value of 5.90 F cm−2 achieved, even at a larger current density of 50 mA cm−2, and retention of about 93% of the original capacitance over 7500 charge–discharge cycles when the applied current density is 150 mA cm−2, makes it a potential electrode material for large-scale energy storage devices with confined areas, like micro-supercapacitors. In addition, an as-fabricated asymmetric supercapacitor (ASC) exhibits areal capacitance of 597 mF cm−2, an energy density of 0.21 mWh cm−2, and a power density of 4.44 mW cm−2 at 10 mA cm−2, with high rate capability and capacitance retention of 79.5% over 10,000 cycles.
AB - Tremendous efforts are devoted to the rational design of self-supported hierarchical architectures that are capable of delivering ultrahigh areal capacitance, and that are essential for miniaturized energy storage devices. Herein we propose a one-step-solvothermal approach for the hierarchical advancement in the morphology of the Ni3S2 on Ni foam from one-dimensional (1D) nanowires to a three-dimensional lettuce-like architecture with an internal nanowire network and corals at the edges. As the formation of this unique 3D lettuce-like architecture has resulted from the integration of 2D sheets with internal 1D nanowires, the combined features make it possible to realize ultra-high capacitance. This 3D architecture Ni3S2 electrode efficiently offers ultrahigh areal capacitance of 14.64 F cm−2, five times higher than that of nanowire arrays of 2.82 F cm−2 at the higher current density of 10 mA cm−2. A high value of 5.90 F cm−2 achieved, even at a larger current density of 50 mA cm−2, and retention of about 93% of the original capacitance over 7500 charge–discharge cycles when the applied current density is 150 mA cm−2, makes it a potential electrode material for large-scale energy storage devices with confined areas, like micro-supercapacitors. In addition, an as-fabricated asymmetric supercapacitor (ASC) exhibits areal capacitance of 597 mF cm−2, an energy density of 0.21 mWh cm−2, and a power density of 4.44 mW cm−2 at 10 mA cm−2, with high rate capability and capacitance retention of 79.5% over 10,000 cycles.
KW - 1D to 3D modulation
KW - 3D lettuce-like architecture
KW - Asymmetric supercapacitor
KW - Ultra-high areal capacitance
UR - http://www.scopus.com/inward/record.url?scp=85135889558&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2022.166626
DO - 10.1016/j.jallcom.2022.166626
M3 - Article
AN - SCOPUS:85135889558
SN - 0925-8388
VL - 925
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 166626
ER -