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Energies 2013, 6(11), 5597-5608; doi:10.3390/en6115597

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

1
Department of Energy Systems Research, Ajou University, Suwon 443-749, Korea
2
Advanced Battery Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
*
Author to whom correspondence should be addressed.
Received: 1 August 2013 / Revised: 10 October 2013 / Accepted: 11 October 2013 / Published: 24 October 2013
(This article belongs to the Special Issue Li-ion Batteries and Energy Storage Devices)
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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 lithium iron phosphate battery; model; discharge; cathode composition
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Lee, J.; Yi, J.; Shin, C.B.; Yu, S.H.; Cho, W.I. Modeling the Effects of the Cathode Composition of a Lithium Iron Phosphate Battery on the Discharge Behavior. Energies 2013, 6, 5597-5608.

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