Thermal conductivity of V2O5 nanowires and their contact thermal conductance

Abstract

Vanadium pentoxide (V₂O₅)-based composites show outstanding performances as cathode materials in lithium-ion batteries. However, their inferior thermal conductivity restricts the heat dissipation through the cathode electrode. In this study, we measured the thermal conductivity of V₂O₅ nanowires using the thermal bridge method and found that their thermal conductivity is 3.84 ± 0.38 W m⁻¹ K⁻¹ at T = 300 K. The contact thermal resistance between two nanowires with the same size was measured to be up to 50%–80% of the total thermal resistance in the measured samples, indicating that their contact is the bottleneck for thermal dissipation.