3D SnO2/sulfonated graphene composites with interpenetrating porous structure as anode material for lithium-ion batteries

Abstract Combine SnO 2 nanoparticles with some conductive carbonaceous materials has been regarded as one of the most effective strategies to solve the problems of poor conductivity and volume change. In this work, a SnO 2 /sulfonated graphene composite with 3D interpenetrating porous structure (3D SnO 2 /SG) was synthesized. The elaborate designed 3D SG structure not only generates an excellent electronic conductivity, but also buffers the volume expansion of the SnO 2 particles. As a result, the desirable 3D possesses enhanced performance when used as anode material in lithium battery. For example, the electrochemical results showed that the 3D SnO 2 /SG presents a high reversible specific capacity (928.5 mA h g −1 at the current density of 200 mA g −1 ). Even after 120 cycles, the specific capacity of 679.7 mA h g −1 (at the current density of 400 mA g −1 ) are still maintained.