Zhang Deyang, Feng Binhe, Guo Wenbo, Cheng Jinbing, Qiu Kangwen, Guo Ying
Key Laboratory of Microelectronics and Energy of Henan Province, Xinyang Normal University, Xinyang, 464000, China.
Henan International Joint Laboratory of MXene Materials Microstructure, Nanyang Normal University, Nanyang, 473061, China.
Discov Nano. 2025 Sep 9;20(1):156. doi: 10.1186/s11671-025-04347-y.
A cost-effective and large-scale method for synthesizing ZnCoO nanoflowers with surface oxygen vacancies as electrode materials for supercapacitors is presented. The existence of oxygen vacancies on the surface of the ZnCoO nanoflowers has been confirmed through X-ray photoelectron spectroscopy (XPS). The energy bands and density of states (DOS) of ZnCoO are examined using density functional theory, revealing that treatment with NaBH reduces the band gap of ZnCoO while increasing the DOS near the Fermi level compared to pristine ZnCoO. Furthermore, the specific capacitance of reduced ZnCoO is nearly double that of its unmodified counterpart. This straightforward and practical approach significantly enhances both conductivity and specific capacitance in metal oxides, making it applicable to other similar materials.
提出了一种经济高效且大规模合成具有表面氧空位的ZnCoO纳米花作为超级电容器电极材料的方法。通过X射线光电子能谱（XPS）证实了ZnCoO纳米花表面存在氧空位。利用密度泛函理论研究了ZnCoO的能带和态密度（DOS），结果表明，与原始ZnCoO相比，用NaBH处理可降低ZnCoO的带隙，同时增加费米能级附近的DOS。此外，还原后的ZnCoO的比电容几乎是未改性的ZnCoO的两倍。这种直接且实用的方法显著提高了金属氧化物的导电性和比电容，使其适用于其他类似材料。
