Synergistic effect of Mg and Ti ions by dual-site modulation strategy induces enhanced ordering and electrochemical performance of the layered cathode for sodium–ion batteries

ions and to alleviate the structure degradation benefiting from Mg ions leads to the pillar effect of Mg ions in Na sites, enhances structural integrity by strong Ti-O bonds in contrast to Mn-O bonds, suppresses the P2-O2 transition and promotes the diffusion of Na ions, thereby improving the electrochemical performance of NMNTM.