The Difference Between Lithium Ion Batteries And Lifepo4 Batteries

Introduction

Knowing the differences between li-ion batteries and lifepo4 batteries is key to choosing a suitable lithium battery.Lithium ion batteries and lithium iron phosphate batteries are two significant types of rechargeable batteries that have gained extensive attention in modern energy storage applications. They are play crucial roles in powering various devices, from portable electronics to electric vehicles and large scale energy storage systems. So what is difference between lithium ion batteries and lifepo4 batteries?

1.Chemical Composition

The material range of Lithium ion batteries typically have lithium cobaltate , lithium nickelate , and lithium manganate . The anode is usually made of graphite.

Lithium Iron phosphate battery : The cathode material is lithium iron phosphate ,the anode is also graphite,similar to that of lithium ion battery but the different cathode chemistry, the performance characteristics is different.

2.Nominal Voltage 
Lithium ion battery : The nominal voltage of lithium ion battery cell is usually around 3.6 or 3.7V. Different cathode materials can slightly affect the voltage range. For example, during charging, the full voltage of 3.7v 2600mah lithium ion battery can reach up to about 4.2V, and during discharging, it typically drops to around 3.0V as a lower limit.

Lithium iron phosphate battery : The nominal voltage of a lifepo4 battery cell is 3.2 V. During charging, it usually reaches a maximum voltage of around 3.6V, and during discharging, it can go down to around 2.5V.

3.Energy Density

Lithium ion Battery : Generally, lithium ion batteries have a relatively high energy density.This advantage of high energy density makes lithium ion battery to widely used in daily life and common applications ,such as in smartphones and laptops, allowing for longer battery life in a compact form factor.

4.Cycle Life

Lithium ion Battery : The cycle life range of a lithium ion battery is 300 - 1000 times .Factors such as high temperature operation, deep discharge, and high rate charging can affect lithium ion battery life.

Lithium Iron Phosphate Battery : Lifepo4 battery life can reach up to 1500 - 3000 times cycles or more.

5.Safety

Lithium ion Battery : Some lithium ion batteries, especially those with cobalt based cathodes, will have more safety issues. High temperature conditions, overcharging, or physical damage can lead to thermal runaway, a situation where the battery self heats uncontrollably and can potentially catch fire or explode. This is because the cobalt based cathode materials can release oxygen under certain conditions, which can then react with the electrolyte and other flammable components.

Lithium Iron Phosphate Battery : Lifepo4 batteries are known for their enhanced safety. Because the cathode structure is more stable thermally.

6.Application Fields

Lithium-ion Batteries: With their advantages of high energy density and portability, they are widely used in the field of mobile devices, such as smart phones, tablet computers, and laptop computers; they are also used in the field of electric vehicles, but in some application scenarios with extremely high safety requirements, their safety may need to be further strengthened.

Lithium Iron Phosphate Batteries: Due to their high safety, long life, and low cost, they are suitable for large-scale energy storage fields, such as solar and wind energy storage systems; they are also widely used in the field of electric vehicles, especially on large vehicles such as electric buses and electric trucks.

Carry Zhang

sales02@liliangbattery.com

www.liliangbatttery.com