January 1, 2000Journal of The Electrochemical Society
LiMn[sub 2]Osub 4 Spinel Cathode Material Showing No Capacity Fading in the 3 V Range
Authors
Discussion
Loading...
Member takes
Implication
Experimental study demonstrates zero capacity fading in sol-gel synthesized lithium manganese oxide in the 3 V range, suggesting enhanced durability for battery cathodes.
Key Points
- To synthesize a lithium manganese oxide spinel cathode using a sol-gel method and evaluate its electrochemical capacity retention across the 3 V and 4 V operational ranges.
- Prepared LiMn2O4 spinel cathode material via a sol-gel synthesis method.
- Conducted electrochemical charge/discharge cycling at a current density of 0.5 mA/cm² within the 2.4–3.4 V range (including tests at 54°C), the 4 V range over 40 cycles, and the combined full-voltage range.
- Delivered a reversible capacity of 137–139 mAh/g (93–94% of the theoretical 148 mAh/g capacity) with zero capacity fading in the 2.4–3.4 V range, exhibiting improved performance at 54°C.
- Showed typical stoichiometric spinel behavior in the 4 V range with an initial discharge capacity of 103–108 mAh/g that decreased by approximately 10% after 40 cycles.
- Achieved lower capacity loss in the 4 V range when cycling continuously across both the 3 V and 4 V plateaus compared to cycling within the 4 V range alone.
Cite This Study
Kang et al. (2000) studied this question.