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

Title
Modeling the Effects of the Cathode Composition of a Lithium Iron Phosphate Battery on the Discharge Behavior
Authors
Jeongbin LeeJaeshin YiChee Burn Shin류승호조원일
Keywords
cathode composition; lithium iron phosphate battery; LiFePO4; model; discharge behavior; modeling
Issue Date
2013-10
Publisher
ENERGIES
Citation
VOL 6, NO 11, 5597-5608
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.
URI
http://pubs.kist.re.kr/handle/201004/46281
ISSN
19961073
Appears in Collections:
KIST Publication > Article
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