Abstract
This paper studies in detail the effect of fuel/oxidant (citric acid/nitrate) ratio on the crystal structure and electrochemical performance of CuFe2O4 prepared by combustion method. The electrochemical tests results show that when the ratio of citric acid to nitrate is 0.6, CuFe2O4 exhibits the best electrochemical performance. After 80 cycles, the discharge specific capacity can still reach 336.2 mAh g−1. In the rate test, after 10 cycles at 2000 mA g−1, the average specific capacity can still maintain at 404.5 mAh g−1. Through the analysis of chemical properties and electrochemical properties, it is believed that the superior performance may stem from the porous structure, appropriate crystallinity, and the suitable grain size induced by the suitable citric acid–nitrate molar ratio.
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Acknowledgements
The project was supported by Science and Technology Program of Jiangxi Province in China (20192BAB216015), Science and Technology Program of Education Department of Jiangxi Province in China (No. GJJ180464) and Scientific Research Foundation of JiangXi University of Science and Technology (jxxjbs17057), Key R&D Programs of Science and Technology Project of Ganzhou City ([2018] 50), and Science and Technology Project of Ganzhou City ([2017] 179).
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Liu, JM., Lu, YH., Xu, ZF. et al. Effect of citric acid-to-nitrate ratio on combustion synthesis of CuFe2O4 for sodium-ion storage. J Mater Sci: Mater Electron 32, 94–101 (2021). https://doi.org/10.1007/s10854-020-04655-2
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DOI: https://doi.org/10.1007/s10854-020-04655-2