Li{sub 1+x}Fe{sub 1{minus}3x}Ti{sub 1+2x}O{sub 4} (0.0 {le} x {le} 0.33) based spinels: Possible negative electrode materials for future Li-ion batteries
Members of the spinel solid solution between LiFeTiO{sub 4} and Li{sub 4}Ti{sub 5}O{sub 12}, i.e., Li{sub 1+x}Fe{sub 1{minus}3x}Ti{sub 1+2x}O{sub 4} (0.0 {le} x {le} 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{sup +}/Li. Results are promising with anodic capacities in excess of 200 mAh g{sup {minus}1} or {approximately}700 mAh cm{sup {minus}3} being obtained over 25 cycles for x = 0.33. Samples containing Fe have reduced reversible capacity, however, the capacity below 1.00 V{sub 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.
- Research Organization:
- Univ. of St. Andrews, Fife (GB)
- OSTI ID:
- 20003925
- Journal Information:
- Journal of the Electrochemical Society, Vol. 146, Issue 11; Other Information: PBD: Nov 1999; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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