Figure 5
From: Cu/Li4Ti5O12 scaffolds as superior anodes for lithium-ion batteries
The unique storage mechanism of Cu/LTO: A schematic illustration of a possible storage mechanism for Cu/LTO with highly exposed (111) facets based on DFT calculations. On the surface, two types of Li ions migrate during the lithiation process; xa represents the additional Li ions occupying vacant 8a sites, and x0 denotes the Li ions transported from 8a to 16c sites. In the bulk or under the surface, only Li ions from 8a sites (x0) can insert/deinsert into/from 16c sites. The theoretic capacity is thus 175 mAh g−1.
