This work reports the fabrication of carbon nanotube (CNT) decorated NiSe₂ nanosheets (NiSe₂@CNT) by a rapid microwave process in 2 min. Interestingly, NiSe₂@CNT has a lamellar and tubular interwoven morphology. The specific capacitance of the prepared electrodes with different microwave conditions for supercapacitors were studied. Meanwhile, we compared the electrochemical performances of NiSe₂@CNT with the presence of different amount of CNT. The optimal NiSe₂@CNT electrode can demonstrate a high specific capacitance of 980.5 F g⁻¹ at a current density of 1 A g⁻¹ and good cycling stability of 82% retention after 9000 cycles at 5 A g⁻¹. In addition, an asymmetric supercapacitor was assembled by NiSe₂@CNT as positive electrode and activated carbon (AC) as negative electrode, which successfully light four white light emitting diodes (LEDs) for 6 min with an energy density of 25.61 Wh kg⁻¹ at a power density of 810 W kg⁻¹.

这项工作报告了通过快速微波处理在2分钟内制造碳纳米管（CNT）装饰的NiSe ₂纳米片（NiSe ₂ @CNT）。有趣的是，NiSe ₂ @CNT具有层状和管状的交织形态。研究了在不同微波条件下制备的超级电容器电极的比电容。同时，我们比较了不同数量的CNT存在下NiSe ₂ @CNT的电化学性能。最佳的NiSe ₂ @CNT电极 在1 A g ^-1的电流密度下可显示980.5 F g ^-1的高比电容，在5 A g ^-1的9000次循环后保持82％的良好循环稳定性。另外，以NiSe ₂ @CNT为正极并以活性炭（AC）为负极组装了不对称超级电容器，其以25.61 Wh kg ^-1的能量密度成功地点亮了四个白色发光二极管（LED）6分钟。在810 W kg ^-1的功率密度下。