Preparation and battery applications of micron sized Li{sub 4}Ti{sub 5}O{sub 12}
Conference
·
OSTI ID:20019165
The objective of this study was to highlight the usefulness of micron-sized Li{sub 4}Ti{sub 5}O{sub 12} in three distinctive areas: (a) cathode of a low-voltage Li battery, (b) insertion type auxiliary electrode to investigate the electrochemistry of oxide cathode materials, and (c) anode of a Li-ion cell in conjunction with LiMn{sub 2}O{sub 4} cubic spinel cathode. Li cells with Li{sub 4}Ti{sub 5}O{sub 12} exhibited an open circuit voltage of {approximately}1.6V, >90% utilization (in terms of the theoretical capacity) at {approximately}C/10 rate, {approximately}40% utilization 5C rate, and extended full-depth charge/discharge cycling at {ge}1C rates with virtually no capacity fade. LiMn{sub 2}O{sub 4} cathodes, evaluated in Li{sub (4+x)}Ti{sub 5}O{sub 12} (x = {approximately}1.2)/LiMn{sub 2}O{sub 4} cells, exhibited extended full-depth cycling capability with a small capacity fade rate of <0.1% which appeared to slow down with cycling. At a 1C discharge rate, over 190 cycles were demonstrated corresponding to an end utilization of {approximately}90 mAh/g or {approximately}0.6 mole Li per LiMn{sub 2}O{sub 4}. Balanced Li{sub 4}Ti{sub 5}O{sub 12}//solid polymer electrolyte//LiMn{sub 2}O{sub 4} full cells of slightly cathode-limited configuration had an open-circuit voltage of {approximately}3.0V and a mid-discharge voltage of {approximately}2.5V showing full-depth extended cycling capability at a utilization of {approximately}90 mAh/g or {approximately}0.6 mole Li per LiMn{sub 2}O{sub 4} at the 1C and {approximately}0.45 mole Li per LiMn{sub 2}O{sub 4} at the 7.5 C discharge rate.
- Research Organization:
- EIC Labs., Inc., Norwood, MA (US)
- Sponsoring Organization:
- US Department of Energy
- DOE Contract Number:
- FG02-96ER82158
- OSTI ID:
- 20019165
- Country of Publication:
- United States
- Language:
- English
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