Sonochemical synthesis of battery-type ZnCo2O4 electrode material with huge specific surface area for advanced hybrid supercapacitors

Sonochemistry is a novel and efficient method for the synthesis of electrode materials within micro-/nano-scale. In this work, the ZnCo 2 O 4 nanoparticles (NPs) and chain-like ZnCo 2 O 4 nanostructures , namely ZnCo 2 O 4 –7.5 and ZnCo 2 O 4 –9.5, were sonochemically prepared by controlling the pH value of reaction system combined with an extra calcination . The ZnCo 2 O 4 –7.5 NPs exhibited a larger specific surface area (SSA) of 148.77 m 2 g −1 , and presented better electrochemical properties such as a high specific capacity ( C s ) of 331.2C g −1 under 2 A g −1 along with 82.5 % rate performance at 10 A g −1 . As for the ZnCo 2 O 4 –9.5 nanostructure , it delivered an inferior C s of 274.8C g −1 and…

• SS
  Shanxi Scholarship Council of China

  Award: 2021-123
• NS
  Natural Science Foundation of Shanxi Province

  Award: 20210302123053
• NC
  National College Students Innovation and Entrepreneurship Training Program