Abstract
Lithium iron phosphate has been a promising cathode for application in lithium ion batteries (LIBs) due to safety, flat discharge profile and high theoretical capacity of 170 mAh/g. Despite the positive attributes, lithium iron phosphate cathode fabrication methods requiring high binder content (for example, polyvinylidene fluoride), which is seen as dead weight and electrically neutral, affect the capacity performance and present a challenge in obtaining electrodes in an environmentally friendly manner.1-4 As a result, an effective experimental or modelling approach to maximize the performance of a LiFePO4 electrode is valuable to the energy storage field. Herein, use of 95% active material + 5% binder cathode was modeled in COMSOL based on the physical experimental set up. Interestingly, at 0.5 C rate, discharge capacities from COMSOL model and experimental results were 26 Ah/m2 and 23 Ah/m2, respectively. This indicates that use of COMSOL can help us to understand parameters to modify before a physical electrode fabrication is done experimentally. This study intends to investigate various C rates comparison between experimental results and COMSOL’s results, in order to identify the optimum operational conditions for LIBs using low binder content LiFePO4 cathode. REFERENCES C-C. Chang, L-J. Her, H-K. Su, S-H. Hsu, Y.T. Yen, Effects of Dispersant on the Conductive Carbon for LiFePO4 Cathode, Journal of the Electrochemical Society, 158 (5), (2011) A481-A486.Shim, A. Sierra, K. Striebel, abstract #125, IMLB11, Monterey, USA, June, 2002.Ravet, Y. Chouinard, J.F. Magnan, S. Besner, M. Gauthier, M. Armand, Electroactivity of natural and synthetic triphylite, J. Power Sources 97–98, (2001) 503–550.A. Striebel, A. Guerfi, J. Sim, M. Armand, M. Gauthier, K. Zaghib, LiFePO4/gel/natural graphite cells for the BATT program, J. Power Sources 119–12, (2003) 951-954.M. Mastali, M. Farkhondeh, S. Farhad, R. A. Fraser, M. Fowler, Journal of The Electrochemical Society, 163 (13) (2016) A2803-A2816.
Published Version
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