| Autor: |
Nwanya, Assumpta Chinwe, Ndipingwi, Miranda M., Ezema, Fabian I., Iwuoha, Emmanuel I. |
| Zdroj: |
Ionics; Dec2023, Vol. 29 Issue 12, p5237-5248, 12p |
| Abstrakt: |
We studied the potentials of using a green approach for the synthesis of quaternary high compositional diversity NaCr0.1Co0.4Ni0.5O2 nanoparticles (NPs) as an electrode in a sodium-ion supercabattery tested in an aqueous environment. This entailed using aqueous extract from dried Zea mays lea (maize) silk in the synthesis protocol. Structural and morphological elucidation of the material was carried out using x-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The results show that the structure is close to that of NaCrO2 (ICSD 182235) with space group R-3m (No 166) though peaks corresponding to NiO and Co3O4 were also identified in the diffractogram. The SEM analysis revealed that the material comprises hexagonal and triangular prism–shaped nanoparticles whose sizes range from 0.2 to 0.8 μm. The electrochemical energy storage potentials of the NPs were studied in both three- and two-electrode arrangements. In the three-electrode set-up, the counter-electrode used was Pt wire while Ag/AgCl served as the reference electrode, and an initial charge- and discharge-specific capacities of about 35.2 mAh g−1 and 26.7 mAh g−1 were obtained, respectively, at a current density of 0.1A g−1. A full device of AC//NaCr0.1Co0.4Ni0.5O2 which consists of the NaCr0.1Co0.4Ni0.5O2 and activated carbon (AC) as the positive and negative electrodes, respectively, gave a discharge capacity of 10.1 mA h g−1 at a current density of 10 mA g−1. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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