| 초록 |
LiFePO4(LFP) is a promising active material for LIBs owing to its high thermal stability, long cycle life and low toxicity. However, LFP has critical weaknesses such as low Li+ diffusion coefficient and low electric conductivity. That is why primary particles of 100 to 200 nm are aggregated to form a secondary particle of 24 um. However, the design parameters for secondary particles are not investigated due to limited resources. To solve this problem, herein, we built a 3D model for the first time using Comsol Multiphysics as a simulation tool, and applied the model to simulate electrochemical properties of LFP secondary particle (Munakata, K. Kanamura. et al., J. of Power Souces, 2012). As a result, we could attempt to optimize three parameters; 1) radius of LFP primary particle, 2) radius of LFP secondary particle and 3) porosity of LFP secondary particle. |
