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

Jeongbin Lee, Jaeshin Yi, Chee Burm Shin, Seung Ho Yu and Won Il Cho
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Jeongbin Lee: Department of Energy Systems Research, Ajou University, Suwon 443-749, Korea
Jaeshin Yi: Department of Energy Systems Research, Ajou University, Suwon 443-749, Korea
Chee Burm Shin: Department of Energy Systems Research, Ajou University, Suwon 443-749, Korea
Seung Ho Yu: Advanced Battery Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
Won Il Cho: Advanced Battery Center, Korea Institute of Science and Technology, Seoul 136-791, Korea

Energies, 2013, vol. 6, issue 11, 1-12

Abstract: 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.

Keywords: lithium iron phosphate battery; model; discharge; cathode composition (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2013
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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