Members of the spinel solid solution between LiFeTiO 4 and Li 4 Ti 5 O 12 , i.e., Li 1 + x Fe 1 − 3 x Ti 1 + 2 x O 4 (0.0& ≤ x ≤ 0.33) have been investigated as possible negative electrodes for future lithium‐ion batteries. Electrochemical behavior and associated structural changes have been investigated over the potential range 0.01‐2.6 V vs. Li + / Li . Results are promising with anodic capacities in excess of 200 mAh g − 1 or ∼ 700 mAh cm − 3 being obtained over 25 cycles for x = 0.33. Samples containing Fe have reduced reversible capacity, however, the capacity below 1.00 V Li is greatly increased. A spinel‐type structure is retained upon lithiation for all compositions studied, however, the degree of cation disorder increases with Fe content.
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Robertson et al. (1999) studied this question.