Enhanced electrochemical performance based on the Al doped Na3.5V1.5Mn0.5(PO4)3 cathode

Bei Li; Shihui Zhou; Pu Hu

doi:10.1117/12.3016231

1 February 2024 Enhanced electrochemical performance based on the Al doped Na₃V₂(PO₄)₃ cathode

Bei Li, Shihui Zhou, Pu Hu

Proceedings Volume 13068, Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023); 130681T (2024) https://doi.org/10.1117/12.3016231
Event: Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023), 2023, Hefei, China

Abstract

The utilization of polyanion Na₃V₂(PO₄)₃ as a cathode material in NASICON-type sodium ion batteries is hindered by the high cost of raw materials and limited energy density. To address this issue, a double doping strategy using Mn²⁺ and Al³⁺ was adopted in Na₃V₂(PO₄)₃ based on the charge balance theory, aiming to enhance the electrochemical performance. The Na_3.5V_1.4Mn_0.5Al_0.1(PO₄)₃/C composite was synthesized, exhibiting a reversible capacity of 118 mAh g^-1 at 0.2 C and a decent capacity retention of 81.4% after 200 cycles. Furthermore, the midpoint voltage analysis revealed that, after 200 cycles, the voltage plateau of NMVP dropped drastically from 3.42 V to 3.28 V, while the voltage plateau value of NMVPS- 0.05 only experienced a slight decrease from 3.42 V to 3.39 V, indicating the positive impact of Al doping on the electrochemical performance. These results suggest that the Na_3.5V_1.4Mn_0.5Al_0.1(PO₄)₃/C composite has great potential as a cathode material for sodium ion batteries.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Bei Li, Shihui Zhou, and Pu Hu "Enhanced electrochemical performance based on the Al doped Na₃V₂(PO₄)₃ cathode", Proc. SPIE 13068, Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023), 130681T (1 February 2024); https://doi.org/10.1117/12.3016231

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