Modeling the Effects of the Cathode Composition of a Lithium Iron Phosphate Battery on the Discharge Behavior

Energies

Jeongbin Lee¹  Jaeshin Yi¹  Chee Burm Shin¹  Seung Ho Yu² 

[1] Department of Energy Systems Research, Ajou University, Suwon 443-749, Korea; E-Mails:;Advanced Battery Center, Korea Institute of Science and Technology, Seoul 136-791, Korea; E-Mails:

关键词: lithium iron phosphate battery;    model;    discharge;    cathode composition;   

DOI  :  10.3390/en6115597

来源: mdpi

【 摘 要 】

This paper reports a modeling methodology to predict the effects on the discharge behavior of the cathode composition of a lithium iron phosphate (LFP) battery cell comprising a LFP cathode, a lithium metal anode, and an organic electrolyte. A one-dimensional model based on a finite element method is presented to calculate the cell voltage change of a LFP battery cell during galvanostatic discharge. To test the validity of the modeling approach, the modeling results for the variations of the cell voltage of the LFP battery as a function of time are compared with the experimental measurements during galvanostatic discharge at various discharge rates of 0.1C, 0.5C, 1.0C, and 2.0C for three different compositions of the LFP cathode. The discharge curves obtained from the model are in good agreement with the experimental measurements. On the basis of the validated modeling approach, the effects of the cathode composition on the discharge behavior of a LFP battery cell are estimated. The modeling results exhibit highly nonlinear dependencies of the discharge behavior of a LFP battery cell on the discharge C-rate and cathode composition.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.