Abstract
In this study, a compact process was introduced to prepare the sulfate-based polyanionic nano cathode material Na2(Ni, Fe)(SO4)2 from nickel sulfide concentrate. The Na2(Ni, Fe)(SO4)2 was synthesized with a four-step process, including sulfate roasting, leaching-purification, co-precipitation, and annealing processes. The crystalline phase identification and microstructure characterization of the final product was performed by X-ray diffraction (XRD) and Scanning electronic microscopy (SEM), respectively. The XRD result shows that the obtained product which was composed of eldfellite compounds Na2(Ni, Fe)(SO4)2 and sodium-rich phase Na6Fe(SO4)4. The SEM reveals that the synthesized material was with a microstructure of nanopore, which might be owing to the nanocarbon powder as nucleation particles can promote the formation of nanometer pore. The nanomaterial Na2(Ni, Fe)(SO4)2, expected to be a promising candidate in energy storage applications as sodium-ion battery, has been synthesized from nickel sulfide concentrate.
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Acknowledgements
This work was financially supported by the China Postdoctoral Science Foundation, the Super Postdoctoral Incentive Program in Shanghai, the Steel Joint Research Foundation of National Natural Science Foundation of China–China Baowu Iron and Steel Group Co. Ltd. (Grant No. U1860203), the National Natural Science Foundation of China (Grant No. 51576164), National Basic Research Program of China (973 Program) (Grant 2014CB643403), and the CAS Interdisciplinary Innovation Team.
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Li, G. et al. (2020). Synthesis of Na2(Ni, Fe)(SO4)2 Cathode Materials from Nickel Sulfide Concentrate by Combined Pyro- and Hydrometallurgical Processes. In: Peng, Z., et al. 11th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36540-0_90
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