Vanadium pentoxide (V₂O₅) is an attractive high-energy cathode material for thermal batteries but is limited by the high solubility and tendency to react with halogenic molten salt. Li_xV₂O₅ (0 < x ≤ 1) are expected to take the place of V₂O₅ as the promising cathode materials in thermal batteries. In this work, Li_xV₂O₅ were successfully synthesized by the high-efficiency and low-cost method, which uses the molten salt as lithium source and through a brief-time sintered process (900 °C for 15 s). Li_xV₂O₅/molten salt electrode with CNTs conductive agent exhibits an original discharge voltage with 2.51 V and a specific capacity up to 309.46 mA h g⁻¹. The high chemical stabilization between Li_xV₂O₅ and molten salt which could increase interfacial structure stabilization and improve the transmission rate of Li⁺. Besides, CNTs could build the continuous electron transport channels in active cathode inter-particles and improve the utilization rate of Li_xV₂O₅. This paper not only prepares the Li_xV₂O₅ cathode materials with high specific capacity via a simple method, but also provides insights into the phase evolution process of V₂O₅ based cathode electrodes during discharge process of thermal batteries.

五氧化二钒 (V ₂ O ₅ ) 是一种极具吸引力的热电池高能阴极材料，但受到高溶解度和与卤代熔盐反应倾向的限制。Li _x V ₂ O ₅ (0 < x ≤ 1)有望取代V ₂ O ₅作为热电池正极材料。本工作以熔盐为锂源，通过短时烧结（900℃，15s），采用高效低成本的方法成功合成了Li _x V ₂ O _{5 。}锂_× V ₂ O ₅/CNTs导电剂熔盐电极的原始放电电压为2.51 V，比容量高达309.46 mA h g ^-1。_{Li x} V ₂ O ₅与熔盐之间的高化学稳定性可以增加界面结构稳定性并提高Li ⁺的传输速率。_{此外，碳纳米管可以在活性正极颗粒间建立连续的电子传输通道，提高Li x} V ₂ O ₅的利用率。本文不仅制备了Li _x V ₂ O ₅通过简单的方法制备高比容量的正极材料，同时也为了解热电池放电过程中V ₂ O ₅基正极的相演化过程提供了见解。