Efficient synthesis of LiV2O5 as the cathode materials for high specific energy thermal batteries

Abstract

LiV2O5 is considered an ideal cathode material for high specific energy thermal batteries due to its high voltage and high thermal stability. However, pure LiV2O5 is difficult to synthesize due to the multivalent nature of vanadium. In this paper, LiV2O5 powders in bulk were synthesized by using commercial V2O5 and LiBr as raw materials, followed by a simple ball milling and a sintering at 600 ℃ for 20 min. The discharge specific capacity of LiV2O5 cathode can reach 360.67 mAh g−1 at 0.05 A cm−2. Furthermore, LiV2O5/CFx cathode shows a specific capacity with 795 mAh g-1 at a cut-off voltage of 1.5 V, demonstrating significant potential for practical applications and providing a new approach for using CFx as a cathode material for thermal batteries. This article not only provides a method for mass-producing pure LiV2O5 cathode materials, but also explores a feasible strategy for using CFx with high-voltage and high specific capacity as cathode materials for thermal batteries.