One-step microwave synthesis of FeSe₂@CNT as high-performance supercapacitor anode material

Abstract

In this work, FeSe₂@CNT nanocomposite anode materials are fabricated using a convenient and efficient one-step microwave method. The FeSe₂@CNT electrode exhibits superior electrochemical performance. The carbon nanotube structure effectively mitigates the severe volume change in the FeSe₂@CNT electrode during continuous charge and discharge. Thus, the capacitance value of 573 F g⁻¹ and capacitance retention of 81.9% for 3000 constant current charge and discharge cycles are achieved. In addition, the asymmetric device assembled with FeSe₂@CNT as the anode and NiSe₂@CNT as the cathode exhibits high Energy density (E can reach 41.32 Wh kg⁻¹ when P is 800 W kg⁻¹), and the device achieves 82.6% capacity retention after 3000 cycles.

Keywords:

• FeSe₂
• carbon nanotubes
• microwave
• supercapacitor

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work is supported by the Basic Research Projects of Shanxi Province under [Grant 20210302123125]; the Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering under [Grant 2021SX-AT006]; China-Belarus Joint Laboratory for the Belt and Road Initiative under [Grant ZBKF2022031101]; and Key Research Program of Lvliang City under [Grant 2021GXYF-1-21].