A polyaniline-coated mechanochemically synthesized tin oxide/graphene nanocomposite for high-power and high-energy lithium-ion batteries

摘要: Abstract Although intensive efforts have been made during the past decades, development of an anode material with high specific capacity and stable cycling performance for lithium-ion batteries (LIBs) using a cost-effective preparation method still remains challenging. Herein, we report polyaniline (PANI)-coated mechanochemically synthesized SnO2/graphene (SG) nanocomposite via in situ polymerization. PANI-coated nanocomposites are successfully prepared different raw mass ratios (aniline:SG, 0.15:1, 0.2:1, 0.25:1). The initial aniline:SG ratio 0.2:1 (20%PANI-SG) contains optimal structure housing genuine PANI nanofibers as conductive bridges relatively surface area 158.5 m2 g−1; furthermore, it exhibits over 100 cycles at current density (1000 mA g−1) more than twice that starting SG electrode 100th cycle. Additionally, this achieved outstanding rate densities changing stepwise from to 3000 mA g−1 back, exhibited 467 mA h g−1 even 2000 mA g−1. In terms electrochemical stability, capability process, PANI-SG is viable next-generation high-power high-energy LIBs.