Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 32, Issue 7, Pages 9721-9729Publisher
SPRINGER
DOI: 10.1007/s10854-021-05633-y
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Funding
- special funds for basic scientific research operations of central universities [2019XKQYMS06]
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In this study, a self-supporting Ni3S2/FL-Ti3C2/Ni electrode with a 2D heterojunction structure was synthesized using foamed nickel as a nickel source and a one-step hydrothermal method. It showed high specific capacitance, excellent rate performance, and electrochemical stability. Furthermore, it was used in an asymmetric supercapacitor with high energy density and power density.
In this work, using foamed nickel as a nickel source, a self-supporting in situ growth binder-free Ni3S2/FL-Ti3C2/Ni electrode with a 2D heterojunction structure was synthesized via a one-step hydrothermal method after etching a few-layer Ti3C2(FL-Ti3C2) MXene. This electrode provides a high specific capacitance of 1752 mF/cm(2) in a 3 M KOH electrolyte at 1 mA/cm(2) and has excellent rate performance (75.5% at 10 mA/cm(2)) and electrochemical stability (74.79% after 5000 cycles). An asymmetric supercapacitor is prepared with Ni3S2/Ti3C2/Ni as the positive electrode and AC as the negative electrode. The maximum energy density and the power density are 32.7 mu Wh/cm(2) and 8.0211 mW/cm(2), respectively.
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