Cycle testing step for lithium-ion battery lithium iron phosphate(LiFePO4) catho
Latest updated: May 16, 2024 Video recording version: 8.0.0.516, compatible with BTS 8.0 software.
Open the pre-set cyclic test step file.
First set aside for 1 hour to stabilize the internal area of the battery.
Since the cathode material was studied, the constant current charging work step was set up first.
After selecting the C-rate mode, input the theoretical specific capacity of the material and the mass of the active material, and then the current value of constant-current charging and discharging can be calculated automatically.
Theoretical specific capacity of lithium iron phosphate is 170 mAh/g, and the mass of input actives is 2mg.
Set the activation rate to 0.2C.
Charging and discharging with small currents improves the redox activity of the battery during electrochemical processes.
Lithium iron phosphate cathode material generally undergoes redox reaction at higher voltage.
Therefore, the test voltage window is set at 2.0~4.2V, please refer to the literature and combine with your own experiments.
Then set the constant-current discharger step with a multiplier of 0.2C.
Set the cycle start step to 2.
Because side reactions usually fade away after 10 to 15 cycles and change to an inactive phase.
Therefore, the number of cycles is set to 20.
Then proceed to set up the constant-current charging and constant-current discharging electrician steps.
Set the cycle rate to 20C to study the high rate performance of the battery.
The current size of the cycle test setting can be reasonably adjusted based on the rate test results.
The purpose of setting the number of cycles at 1000 or more is to study the long cycle life characteristics of lithium iron phosphate cathode materials.
You can set the cycle rate (current) and cycle times according to your own needs.
The above demonstration parameters are for reference only, please refer to your own experiments.
After setting the parameters of the work step, just click start.
