【摘要】 用柠檬酸溶胶-凝胶工艺制备出了LiV₃O₈化合物,并检测了其作为热电池阴极材料时的放电性能,干凝胶210℃焙烧所得的粉末颗粒疏松多孔,300℃时可变成结晶岩状,低温焙烧时出现了Li_0.3V₂O₅和LiV₂O₅相,经650℃长时间保温后可转变为LiV₃O₈,模拟Li-B/LiCl-KCl/LiV₃O₈（或V₂O₅）热电池500℃放电试验表明,LiV₃O₈因具有良好的电子导电体和较低的Li⁺扩散极化,其放电较V₂O₅平稳,虽峰值电压略有降低,但可利用的比容量（电压降至峰值电压的75％或2.0 V）均不低于V₂O₅;LiV₃O₈中掺入8％的P₂O₅时可提高小电流放电时的电压。更多还原

【Abstract】 Compound LiV₃O₈ has been synthesised by citric acid sol-gel process and its discharge behavior has also been investigated as a kind of cathode materials for thermal battery. The particles, obtained from dry-gel baked at 210 ℃, are porous and can turn to be crystalline state at 300 ℃. Li_0.3V₂O₅ and LiV₂O₅ phases that appear at the lower temperature can change to LiV₃O₈ after exposed at 650 ℃ for a long time. Discharge tests at 500 ℃, by simulating Li-B/LiC1-KC1/LiV₃O₈ （or V₂O₅ ） thermal cells, show that LiV₃O₈ discharges more steadily than V₂O₅ because of having better electron-conductibility and lower diffusion-polarizability for lithium ion, and that the usable specific capacities for LiV₃O₈, corresponding to 75% of peak-voltage or 2.0 V, are not lower than that for V₂O₅, even with a reduced peak-voltage. Addition of 8% of P₂O₅ to LiV₃O₈ can increase discharge voltage at lower current density.更多还原