The multiple synthesis of 2D layered MXene Ti3C2Tx/Ag/Cu composites with enhanced electrochemical properties

Abstract

The reactive groups present on the surface of two-dimensional layered Ti3C2Tx materials confer natural superiority to self-assembly compared to other two-dimensional materials. The Ti3C2Tx/Ag/Cu composites are prepared using the unique direct reduction and high adsorption capacity possessed by Ti3C2Tx. The Ag NPs and Cu NPs growing between the Ti3C2Tx layers act as supports to prevent the occurrence of defects such as aggregation and collapse of the structure. Meanwhile, the layer spacing of Ti3C2Tx increases, thus exposing more active sites and accelerating the diffusion ability of ions in the electrolyte. The Ag NPs and Cu NPs on the surface of Ti3C2Tx and at the edges of the layers combine with each other to form the multi-channel, short distance conductive path, which effectively improves the electron transfer efficiency. The capacitance contribution of Ti3C2Tx/Ag/Cu composites reaches 74% at high sweep rates. The Ti3C2Tx/Ag/Cu composites can be considered as electrode materials for batteries and capacitors with low internal resistance(0.662 Ω), high electrical conductivity and stable chemical properties.