Citation: Ming WANG, Yuan-Yuan CAI, Yi YANG, Dian ZHU, Na-Na ZHANG, Mei-Fang WANG, Xiang-Zi LI. Synthesis and Characterization of Ni₂P@CoP₃ Core-Shell Nanospheres for Supercapacitors[J]. Chinese Journal of Inorganic Chemistry, ;2021, 37(9): 1633-1641. doi: 10.11862/CJIC.2021.194 shu

Synthesis and Characterization of Ni₂P@CoP₃ Core-Shell Nanospheres for Supercapacitors

Ming WANG ¹ ,
Yuan-Yuan CAI ¹ ,
Yi YANG ¹ ,
Dian ZHU ¹ ,
Na-Na ZHANG ¹ ,
Mei-Fang WANG ^{1, 2,,} ,
Xiang-Zi LI ^{1, 2,,}

1.
Institute of Synthesis and Application of Medical Materials, College of Pharmacy, Wannan Medical College, Wuhu, Anhui 241000, China
2.
Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Key Laboratory of Functional Molecular Solids, The Ministry of Education, Wuhu, Anhui 241000, China

Corresponding author: Mei-Fang WANG, zijingyuwinter@163.com Xiang-Zi LI, li-xiang-zi@163.com
Received Date: 16 March 2021
Revised Date: 15 July 2021

Figures(6)

Ni nanospheres and Ni@Co(OH)₂ nano-urchin-spheres precursor were successively fabricated with hydrothermal technique, and then the latter were changed into NiO@CoO by high temperature calcination process, and Ni₂P@CoP₃ core-shell nanospheres were finally obtained using sodium hypophoshpite as raw material by high temperature phosphating process. The morphologies, structures and compositions of the as-obtained products were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), high angle annular dark field-scanning transmission electron microscope (HAADF-STEM), X-ray powder diffractometer (XRD), energy dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). At the same time, the electrochemical performance of the electrodes were investigated by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and cycling stability experiments. The results showed that as-obtained Ni₂P@CoP₃ core-shell nanospheres with diameter of~400 nm were composed of hexagonal Ni₂P nanocore and cubic CoP₃ nanoshell. Compared with pure Ni₂P or CoP₃ nanospheres, Ni₂P@CoP₃ core-shell nanospheres are more conducive to the mass transfer of electrolyte and promote the pseudo capacitive reaction because of its synergistic effect of composite structure, which shows higher specific capacity, stability and longer cycle life.
- Ni₂P@CoP₃ nanospheres,
- hydrothermal technique,
- core-shell structure,
- supercapacitor
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Synthesis and Characterization of Ni₂P@CoP₃ Core-Shell Nanospheres for Supercapacitors