Thursday, October 23, 2008

Chemistry Comparison

Cell Chemistries LiCoO2 LiMn2O4 LiNiCoMnO2 LiFePO4
Rate Voltage 3.7V 3.8V 3.6V 3.2V
Charging Voltage 4.2V 4.2V 4.2V 3.7V
Discharging end Voltage 3.0V 2.5V 2.5V 2V
Energy Density (Wh/L) 447 253 327 222
Energy Density (Wh/Kg) 140-145 105-115 140-155 120-135
Cycle Life >300 >300 >1000 >1000
Self-Discharge Rate (Month) 1% 5% 1% 0.05%
High Temperature Performance (55±2℃) Good Acceptable Good Excellent
Low Temperature Performance (-20±2℃) Good Good Good Good
High-rate Discharge (10C) N/A Good Good Excellent
Safety & Environmental Concerns Bad Good Good Excellent

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