The Li{sub 4}Ti{sub 5}O{sub 12}//PAN electrolyte//LiMn{sub 2}O{sub 4} rechargeable battery with passivation-free electrodes
- EIC Labs., Inc., Norwood, MA (United States)
The Li-ion cell, Li{sub 4}Ti{sub 5}O{sub 12}//PAN electrolyte//LiMn{sub 2}O{sub 4}, appears to be a classic example of a battery with passivation-free electrodes. Its gross impedance characteristics remain steady during long-term cycling at high charge/discharge rates. The cell showed excellent rechargeability at >99.9% coulombic efficiency for nearly 250 full-depth cycles, at a 1C discharge rate and a C/5 charge rate. The capacity fade was low at approximately 0.12% per cycle at around 100 cycles and {approximately}0.05% at around 200 cycles. Excellent utilizations of the cathode and anode were observed with values of 100 mAh/g of LiMn{sub 2}O{sub 4} and 140 mAh/g of Li{sub 4}Ti{sub 5}O{sub 12} at 1 C discharge rate, and 70 mAh/g of LiMn{sub 2}O{sub 4} and 92 mAh/g of Li{sub 4}Ti{sub 5}O{sub 12} at 7.5C discharge rate. Electrode utilizations were significantly better under pulse discharge conditions at the 8C--16C rates. The energy density of the cell, calculated with a cell voltage of 2.6 V and practically observed cathode and anode capacities at the C/10 discharge rate, is 60 Wh/kg. The weights of the electrodes, current collectors, and electrolyte are included in this value. It is suitable for applications where high power and very long cycle life are required.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-96ER82158
- OSTI ID:
- 653520
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 8 Vol. 145; ISSN 0013-4651; ISSN JESOAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
Preparation and battery applications of micron sized Li{sub 4}Ti{sub 5}O{sub 12}
Sulfone-based electrolytes for high voltage li-ion batteries.