Facile construction of three-dimensional NiCo2S4 with tremella-like morphology for high-performance supercapacitors

• Microwave approach is used to prepare ultrathin hydroxide.
• The ultrathin hydroxide then is changed into tremella-shaped NiCo2S4.
• The NiCo2S4 shows a 3D overall interconnected framework.
• The feature is good to mass and electron transfer during electrode reaction.
• A superior capacitive performance was delivered.

The microwave approach along with hydrothermal treatment was used for the fabrication of NiCo2S4 for high-performance supercapacitors. The as-fabricated NiCo2S4 shows a three-dimensional structure with tremella-like morphology. The unique architecture creates an ultra-fast electron transfer and electrolyte transport during the electrochemical reaction. The NiCo2S4 electrode delivers a high specific capacitance of 1410.7 F/g at 1 A/g. The capacitance retention reaches 92.7% at 20 A/g after 3000 cycles.

The study reported the synthesis of tremella-like NiCo2S4 for supercapacitors. Microwave method is used to prepare ultrathin nickel/cobalt hydroxide, which then reacts with Na2S·9H2O by a hydrothermal method to obtain tremella-like NiCo2S4. The unique configuration is much benefical to fast electron and mass transfer during electrode reaction. Thus, the NiCo2S4 delivers a superior capacitive property.Figure optionsDownload as PowerPoint slide