A highly thermally conductive electrode for lithium ion batteries

Abstract

A binder-free flexible graphene–SnO₂ film electrode is readily obtained through filtration of electrochemically exfoliated graphene in Na₂SnO₃ electrolyte solution. Compared to the traditional polymer binder and carbon black formed electrode with the thermal conductivity usually lower than 2 W m⁻¹ K⁻¹, the binder-free graphene–SnO₂ film electrode exhibits a greatly higher thermal conductivity of 535.3 W m⁻¹ K⁻¹, which is beneficial to heat dissipation for lithium ion batteries. The graphene–SnO₂ film anode electrode also demonstrates a high capacity of 698.8 mA h g⁻¹ at a current density of 200 mA g⁻¹ even after 100 charge–discharge cycles.