The effect of alkali metal doping on the electrical conductivity of Li_3(1−x)Na_3x VO₄ (x = 0.0, 0.2, 0.4 and 0.6) is the axiom of this paper. The samples are synthesized using the conventional solid-state reaction technique. The X-ray diffraction results show the polycrystalline behavior of alkali-doped lithium vanadate (Li₃VO₄). It was also observed that sodium (Na⁺) ions have not shown their presence in the diffraction pattern, which indicates that alkali metal ions were well substituted in the interstitials and did not disturb the crystal planes of the lithium vanadate matrix. The X-ray diffraction studies also suggest an increment in the crystallite size of the prepared samples. The optical study shows excellent absorbance in UV range (200–300 nm) and also that with an increase in the alkali-doping concentration, shifts absorbance peaks slightly toward higher wavelengths, suggesting enhancement in the particle size. In these alkali-doped samples, it was observed that ionic conductivity decreases, and conversely, the dielectric constant and loss tangent increase subsequently with an increase in the sodium doping concentration due to the ionic radius of the dopant metal. High ionic conductivity within the range 1.1374 × 10²–7.9326 × 10⁰ Ω⁻¹ m⁻¹ (99.98% of total conductivity) is obtained in superionic phase of the material. These materials can be utilized in field of capacitors, transparent battery and electrode for batteries.

中文翻译：

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纳米级 Li3(1-x)Na3x VO4 超离子导体中的高离子电导率和紫外线阻挡

碱金属掺杂对Li _{3(1− x )} Na _{3 x} VO ₄ ( x = 0.0, 0.2, 0.4 and 0.6)电导率的影响是本文的公理。样品是使用传统的固态反应技术合成的。X 射线衍射结果显示了碱掺杂钒酸锂 (Li ₃ VO ₄ )的多晶行为。还观察到钠（Na ⁺) 离子在衍射图中没有显示它们的存在，这表明碱金属离子在间隙中被很好地取代并且没有干扰钒酸锂基体的晶面。X 射线衍射研究还表明所制备样品的微晶尺寸增加。光学研究表明，在紫外线范围（200-300 nm）内具有出色的吸光度，并且随着碱金属掺杂浓度的增加，吸光度峰值略微向更高的波长移动，表明颗粒尺寸增加。在这些碱掺杂样品中，观察到离子电导率降低，相反，由于掺杂金属的离子半径，介电常数和损耗角正切随后随着钠掺杂浓度的增加而增加。在材料的超离子相中获得² –7.9326 × 10 ⁰  Ω ^-1 m ^-1（总电导率的 99.98%）。这些材料可用于电容器、透明电池和电池电极领域。