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Volume 46 All articles Published: 12 May 2023 Article ID 0097
BO LI JING LIU XIA XIU GUANGLEI YANG KAIXING ZHU
The NASICON-type Na$_3$V$_2$(PO$_4$)$_3$ (NVP) material was synthesized through the sol–gel route and characterized as cathode in sodium-ion battery by the cyclic voltammetry (CV), galvanostatic intermittent titration technique (GITT) as well as electrochemical impedance spectroscopy (EIS) methods. Scan rate-dependent CV demonstrates an approximate diffusion-type behaviour and gives the diffusion coefficient value 5.24 ${\times}$ 10$^{–11}$ cm$^2$ s$^{–1}$ for Na$^+$ in NVP. Both GITT and EIS tests demonstrate the U-shape diffusion coefficients for Na$^+$ correlated to stoichiometry ranging from 10$^{–16}$ to 10$^{–11}$ cm$^2$ s$^{–1}$, where bottom of the diffusion rate corresponding the plateau voltage well matches with CV data. The strong interaction between the main skeleton and Na$^+$ during the two-phase reaction as demonstrated by the X-ray diffraction results was believed as the reason that reduces the diffusion rate of Na$^+$ at the plateau voltage.
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Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
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Bulletin of Materials Science | News
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020 -
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