4.7 Article

Reduced Mo-doped NiCo2O4 with rich oxygen vacancies as an advanced electrode material in supercapacitors

期刊

CHEMICAL COMMUNICATIONS
卷 58, 期 33, 页码 5120-5123

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc01215d

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资金

  1. Natural Science Foundation for Colleges and Universities in Jiangsu Province [20KJA150005]
  2. Advanced Catalysis and Green Manufacturing Collaborative Innovation Center

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Reduced Mo-doped NiCo2O4 prepared through a dual-defect strategy exhibits enhanced electrical conductivity and facilitated charge transfer. As an electrode material in supercapacitors, it shows higher specific capacity, rate capability, and cycling stability.
Reduced Mo-doped NiCo2O4 (R-Mo-NiCo2O4) was facilely prepared through a dual-defect strategy. Mo-doped NiCo layered double hydroxide (Mo-NiCo-LDH) was used as the precursor and calcined in an air atmosphere, and the resultant Mo-doped NiCo2O4 (Mo-NiCo2O4) was further reduced by NaBH4. The number of oxygen vacancies in the obtained R-Mo-NiCo2O4 is significantly increased by both Mo doping and NaBH4 reduction, resulting in greatly enhanced electrical conductivity and facilitated charge transfer. Finally, the R-Mo-NiCo2O4 was used as the electrode material in supercapacitors, which displayed greatly improved electrochemical performance, such as higher specific capacity (285.8 mA h g(-1) at 1 A g(-1)), rate capability (86.1%) and cycling stability (87.4% retention after 5000 cycles).

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