Sn and 3D reticular TiO2 composite flexible electrodes synergistically electrochemical lithium storage

•Easy-to-use hydrothermal and electroless plating methods to prepare electrodes, avoiding cumbersome preparation processes.•The successful loading of Sn on the TiO2 skeleton by the electroless plating method has achieved enhanced conductivity and increased capacity.•The synergy of Sn metal and TiO2 skeleton enables the composite electrode to increase electrical conductivity and capacity.•The nano-conductive reticular structure composed of Sn and TiO2 exhibits a large specific surface area and pseudocapacitance characteristics, which further facilitates the storage of Li.