Porous Silica-Pillared MXenes with Controllable Interlayer Distances for Long-Life Na-Ion Batteries
Philip A. Maughan, Valerie R. Seymour, Ramón Bernardo Gavito, Daniel J. Kelly, Shouqi Shao, Supakorn Tantisriyanurak, Robert Dawson, Sarah J. Haigh, Robert J. Young, Nuria Tapia‐Ruiz, Nuno Bimbo
Abstract
, a sixty-fold increase over the unpillared material and the highest reported for MXenes using an intercalation-based method. The intercalation mechanism was revealed by different characterization techniques, allowing the surface chemistry to be optimized for the pillaring process. The porous MXene was tested for Na-ion battery applications and showed superior capacity, rate capability and remarkable stability compared with those of the nonpillared materials, retaining 98.5% capacity between the 50th and 100th cycles. These results demonstrate the applicability and promise of pillaring techniques applied to MXenes providing a new approach to optimizing their properties for a range of applications, including energy storage, conversion, catalysis, and gas separations.