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<p>In this work, Zn-doped vanadium pentoxide (V<sub>2</sub>O<sub>5</sub>) cathode materials for lithium-ion batteries (LIBs) were prepared via a facile wet chemical solution process followed by post-calcination treatment. The zinc doping impact on the phase structure, surface morphology, chemical states, and specific surface area of the as-prepared powders was studied using X-ray diffraction (XRD), emission scanning electron microscopy (SEM), X-ray photoelectron spectra (XPS), and Brunauer–Emmet–Teller (BET). The electrochemical behavior of undoped (VZ0%) and Zn-doped V<sub>2</sub>O<sub>5</sub> with 1&#xa0;wt% (VZ1%) as cathodes for LIBs was investigated by cyclic voltammetry (CV), galvanostatic charge–discharge, and electrochemical impedance spectroscopy (EIS) measurements. As a result, the VZ1% sample possesses better properties than the VZ0% and suitable for use as cathode material in LIBs. The VZ1% sample displayed a higher specific discharge capacity (210&#xa0;mAh&#xa0;g<sup>−1</sup> at 0.25&#xa0;C), excellent cycle stability with a specific capacitance retention of 63% after 50 cycles of the charge/discharge process, and low charge transfer reaction resistance (<i>R</i><sub>ct</sub> = 107&#xa0;Ω). The considerably improved electrochemical performance of Zn-doped V<sub>2</sub>O<sub>5</sub> can be attributed to its porous structure, lowest crystallite size, cell volume expansion, highest specific surface area, enhanced electronic conductivity and lowest charge transfer resistance.</p>

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Zn-doped V2O5 cathode material for lithium-ion batteries operating in the voltage window of 1.5–4.0 V

  • 期刊论文

  • 发表日期：

    2025年3月25日

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  • Malika Berouaken,
  • Chafiaa Yaddaden,
  • Noureddine Gabouze,
  • Saloua Merazga,
  • Fatima Boudeffar,
  • Abdelhak Cheriet,
  • Lamia Talbi,
  • Katia Chebout Ayouz,
  • Maha Ayat,
  • Amar Manseri

摘要

In this work, Zn-doped vanadium pentoxide (V2O5) cathode materials for lithium-ion batteries (LIBs) were prepared via a facile wet chemical solution process followed by post-calcination treatment. The zinc doping impact on the phase structure, surface morphology, chemical states, and specific surface area of the as-prepared powders was studied using X-ray diffraction (XRD), emission scanning electron microscopy (SEM), X-ray photoelectron spectra (XPS), and Brunauer–Emmet–Teller (BET). The electrochemical behavior of undoped (VZ0%) and Zn-doped V2O5 with 1 wt% (VZ1%) as cathodes for LIBs was investigated by cyclic voltammetry (CV), galvanostatic charge–discharge, and electrochemical impedance spectroscopy (EIS) measurements. As a result, the VZ1% sample possesses better properties than the VZ0% and suitable for use as cathode material in LIBs. The VZ1% sample displayed a higher specific discharge capacity (210 mAh g−1 at 0.25 C), excellent cycle stability with a specific capacitance retention of 63% after 50 cycles of the charge/discharge process, and low charge transfer reaction resistance (Rct = 107 Ω). The considerably improved electrochemical performance of Zn-doped V2O5 can be attributed to its porous structure, lowest crystallite size, cell volume expansion, highest specific surface area, enhanced electronic conductivity and lowest charge transfer resistance.