LiFePO4 battery Vs Li-Ion battery-Difference between LiFePO4 battery and Li-Ion battery

This page compares LiFePO4 battery Vs Li-Ion (Lithium-ion) battery and mentions difference between LiFePO4 battery and Li-Ion battery types. The advantages and disadvantages of LiFePO4 (Lithium-ion Phosphate) battery and Li-Ion battery are also mentioned.

LiFePO4 battery | Lithium-ion Phosphate battery

Following are the features of LiFePO4 battery.
• The term LiFePO4 stands for lithium-ion phosphate.
• It is one type of rechargeable battery also known as LFP battery.
• It uses LiFePO4 as cathode and graphite carbon electrode with metallic grid as anode.
• It is used in vehicles, security lighting systems and as backup power due to lower cost, lower toxicity, long term stability and better performance.
• Cell voltage during operation is between 3 to 3.3 V.
• It offers volumetric energy density of about 220 Wh/dm3.
• It offers more than 10 years and cycle durability of about 2000 cycles.

Li-Ion battery | Lithium Ion Battery

Following are the features of Lithium Ion battery.
• It is one of the rechargeable battery type used in home electronics.
• In Lithium Ion battery, lithium ions move from negative electrode towards positive ones during discharge phase and back during charging phase.
• The battery uses intercalated lithium compound as one of the electrode material.
• The battery cell houses electrolyte and two electrodes. The electrolyte allows ionic movement.
• They have silent features such as higher energy density, lower self discharge and tiny memory effect.

LiFePO4 battery vs Li-Ion battery

Following table mentions comparison between LiFePO4 battery and Li-Ion battery.

Features LiFePO4 battery Li-Ion battery
Energy density in Wh/Kg 90 to 120 150 to 180
V(nom)/cell 3.2 V 3.6 V
V(charging) 3.5 to 3.65 V 3.9 to 4.2 V
Area Medium Lower
Price Medium Higher
Advantages • High Current rating
• Good thermal stability
• Safer compare to Li-Ion battery
• Tolerant to full charge conditions
• High energy density
• Long life time
• Offers high voltage per cell of about 3.6 V and hence single cell can be used for space savings requirements.
Disadvantages • Offers Lower voltage per cell of about 3.2 V
• High self discharge which can cause balancing issues with aging
• It is fragile and hence requires protection circuit for safe operation
• Peak voltage is limited during charging
• It requires monitoring of temperature
• It is expensive

Also refer difference between Dry cell vs Wet cell>> and Lithium Ion battery vs Lithium Polymer battery>>.


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