Preparation of hollow carbon rods by using ZnO as template for high-performance supercapacitor

Supercapacitors possess prominent advantages compared to traditional capacitors or batteries and have been increasingly attracting attentions for their application in energy storage. Carbon materials are the most highly used material for supercapacitors due to the unique characters. However, traditional carbon materials fail to meet up-to-date energy storage application, which requires to develop new carbon structure with superior performances. Herein, we developed a new hollow carbon rods (HCR) using ZnO@ZIF-8 rods as a template. We first achieved ZnO@ZIF-8 rods using ZnO as a template. Then, ZnO@ZIF-8 rods were transformed into ZnO@C, which was further transformed into HCR by removal of ZnO. The result shows that the HCR-800 exhibited high specific capacitance of 228.3 F/g and good cycling stability of retaining 96.51% after 10,000 cycles in 2 M KOH under -1-0 V at 1 A/g. Together, our newly developed HCR has unique structure and superior characteristics and is promising to improve the performances of supercapacitors.

Automated summary

Supercapacitors, with their prominent advantages in energy storage applications, have increasingly gained attention, with carbon materials being the most commonly used due to their unique characteristics. Research has developed hollow carbon rods as a new carbon structure with superior performance potential, showing high specific capacitance and cycling stability in experiments, promising to improve supercapacitor performances.