Hydrothermal Synthesis of Co3O4/ZnCo2O4 Core-Shell Nanostructures for High-Performance Supercapacitors Academic Article uri icon


  • Supercapacitive properties of Co/ZnCo oxide composite with a core–shell nanostructure (Co3O4/ZnCo2O4) prepared directly onto a nickel foam substrate by a two-step hydrothermal method were investigated. The synthesized core–shell structure consisted of some ∼40–100 nm in thick flaky ZnCo2O4 deposits coated onto the surface of Co3O4 nanorods measuring ∼150 nm in diameter. The specific capacitance value of the Co3O4/ZnCo2O4 core–shell nanostructure synthesized by hydrothermal at 130 °C for a ZnCo2O4 deposition time of 2 h can attain 1804 F g−1 at a scan rate of 5 mV s−1. Furthermore, the core–shell structured electrode still exhibited a relatively good capacitance retention of more than 93% after 3000 CV cycles due to the superior structural support of Co3O4 scaffolds. The Co3O4/ZnCo2O4 core–shell structure exhibits excellent electrochemical performances and, as such, is one of the more promising active materials in pseudocapacitor applications.

published proceedings

  • Journal of The Electrochemical Society

author list (cited authors)

  • Lin, E., Chao, F., Liang, C., Chang, C., Fang, A., Lin, C., ... Chen, C.

citation count

  • 0

complete list of authors

  • Lin, En-Syuan||Chao, Feng-Sheng||Liang, Chen-Jui||Chang, Chi-Jung||Fang, Alex||Lin, Chung-Kwei||Chang, Yu-Cheng||Tsay, Chien-Yie||Wu, Jerry J||Chen, Chin-Yi

publication date

  • December 2021