What is the capacity retention rate of lithium iron phosphate batteries?

After 150 cycles of testing, its capacity retention rate is as high as 99.7 %, and it can still maintain 81.1 % of the room temperature capacity at low temperatures, and it is effective and universal. This new strategy improves the low-temperature performance and application range of lithium iron phosphate batteries.

What is a lithium ion battery?

Lithium-ion batteries have gradually become the mainstream of electric vehicle power batteries due to their excellent energy density, rate performance and cycle life. At present, the most widely used cathode materials for power batteries are lithium iron phosphate (LFP) and ternary nickel-cobalt-manganese (NCM).

How to improve electrical conductivity of lithium ion at low temperature?

In this paper, the electrical conductivity of the material was improved by controlling the nano-structure of lithium iron phosphate, and the concentration deviation of lithium ion at low temperature was equalized by adding LATP in high concentration lithium salt and positive electrode.

What is the structure of lithium iron phosphate (LFP) battery?

Lithium Iron Phosphate (LFP) Battery 3.1. Structure and Properties of LFP LFP has an olivine crystal structure , which transforms into the FePO 4 (FP) phase during the charging process. Due to the similar crystal structure of the two phases, the volume change of the crystal cell before and after discharge is only 6.81%.

Why is lithium iron phosphate a bad battery?

Lithium iron phosphate battery works harder and lose the vast majority of energy and capacity at the temperature below −20 ℃, because electron transfer resistance (Rct) increases at low-temperature lithium-ion batteries, and lithium-ion batteries can hardly charge at −10℃. Serious performance attenuation limits its application in cold environments.

What are the cathode materials of lithium ion batteries?

The cathode materials of LIBs include LFP, NCM, lithium cobaltate (LCO), and lithium manganate (LMO) etc. As shown in Table 1, LFP shows extremely high cycle life and a stable voltage platform, which can effectively reduce battery weight and ensure the acceleration ability of electric vehicles.