First-principles study of high performance lithium/sodium storage of Ti3C2T2 nanosheets as electrode materials*

Project supported by the National Natural Science Foundation of China (Grant Nos. 51772069 and 51772070).

Bai Li-Na1, Kong Ling-Ying1, Wen Jing1, Ma Ning2, Gao Hong1, Zhang Xi-Tian1, 3, †
       

Twelve stable configurations of (a) Ti3C2Li2 and Ti3C2T2Li2, (b) Ti3C2Na2 and Ti3C2T2Na2 systems with the c-axis lattice constant of 25.04 Å, and (c) Ti3C2Li4 and Ti3C2T2Li4, (d) Ti3C2Na4 and Ti3C2T2Na4 systems with the c-axis lattice constant of 35.04 Å. Note: htotave = have(top) +have(bottom), where have(top) and have(bottom) are the average vertical height from the upper or lower layers of Li/Na atoms to the corresponding surface layer of Ti(1) atoms.