Abstract
Mn-doped Li3V2−x Mn x (PO4)3 nanocrystals with enhanced electrochemical properties for lithium-ion batteries were synthesized by aerosol process successfully. The nanocrystals synthesized from aerosol-assisted spray process have an average particle size smaller than 500 nm, with some initial particle size of about 100 nm. The Mn-doped Li3V2(PO4)3 cathode materials show higher capacity and coulombic efficiency than pure Li3V2(PO4)3 materials. Especially, the Mn-doped Li3V1.94Mn0.06(PO4)3 shows a capacity of 130 mAh/g in the voltage range of 3.0–4.4 V and a coulombic efficiency of 99.5 % at 1C. The results from XRD, SEM, HRTEM, and EIS suggested that lattice changes of Li3V2(PO4)3 due to Mn doping and the fine particles enabled by aerosol-assisted spray process can significantly reduce the charge-transfer resistance and improve the apparent Li+ diffusion coefficient of insertion/desertion in the electrodes, which were the critical reason of better electrochemical performance of Mn-doped Li3V2(PO4)3 cathode materials.
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Acknowledgements
This work was supported by the Natural Science Foundation of China (51402187, 20825724, and 21237003), Science and Technology Commission of Shanghai Municipality (14DZ2261000), 085 Engineering Foundation from Shanghai University of Electric Power (Energy Storage for Smart Grid).
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Lai, C., Chen, Z., Zhou, H. et al. Mn-doped Li3V2(PO4)3 nanocrystal with enhanced electrochemical properties based on aerosol synthesis method. J Mater Sci 50, 3075–3082 (2015). https://doi.org/10.1007/s10853-015-8867-6
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DOI: https://doi.org/10.1007/s10853-015-8867-6