Effect of calcination methods on electrochemical performance of NiO used as electrode materials for supercapacitor

Bulletin of materials science

X Y Qin¹  L Wang¹ 

[1] Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 230031 Hefei, P. R. China$$Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 230031 Hefei, P. R. ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 230031 Hefei, P. R. China$$

关键词: NiO;    calcination methods;    electrochemical performance;    electrode materials;    supercapacitor.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Ni(OH)₂ precursors were prepared via the precipitation transformation method, which was originated from Na₂C₂O₄, NiSO₄.6H₂O and urea. NiO samples were successfully obtained by calcining Ni(OH)₂ precursor with different calcination methods. Some were calcination in a tube furnace under the nitrogen flow and others were calcination in a muffle furnace. The products were well-characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The influence of calcination methods on electrochemical performance of NiO samples were investigated. Moreover, the possible reason was proposed. The charge storage mechanism of NiO positive electrode in aqueous electrolyte was discussed. The electrochemical test showed that the as-prepared NiO prepared in a tube furnace can exhibit a good pseudocapacitance behaviour due to the higher utilization of active material.

【 授权许可】

Unknown