%0 Journal Article
%T Porous Ti3C2Tx MXene for Ultrahigh-Rate Sodium-Ion Storage with Long Cycle Life
%J -
%D 2018
%R https://doi.org/10.1021/acsanm.8b00045
%X The development of anode materials remains a challenge to satisfy the requirements of sodium-ion storage for large-scale energy-storage applications, which is ascribed to the low kinetics of ionic/electron transfer of electrode materials. Here we show that the controlled anisotropic assembly of highly conductive Ti3C2Tx MXene nanosheets to form a porous structure can enhance the sodium-ion storage kinetics. At high current densities of 1 and 10 A g每1, the porous Ti3C2Tx electrode delivered capacities of 166 and 124 mA h g每1, respectively. Even at an extremely high current density of 100 A g每1, a capacity of 24 mA h g每1 could be achieved. The porous Ti3C2Tx electrode also exhibited a long cycle life that can be extended to 1000 cycles with no capacity decay at a current density of 1 A g每1. This work demonstrates successful control of the Ti3C2Tx architecture to push electrochemical sodium-ion storage closer to large-scale applications and is expected to shed light on the rational utilization of the outstanding properties of MXenes by controlling their microscopic assembly
%U https://pubs.acs.org/doi/10.1021/acsanm.8b00045