콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Comparative study on experiments and simulation of blended cathode active materials for lithium ion batteries
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2016-01
- 저자명 Williams Agyei Appiah, Joonam Park, Luu Van Khue, Yunju Lee, Jaecheol Choi, Myung-Hyun Ryou, Yong Min Lee
- 학술지명 Electrochimica Acta
- 발행처명 Pergamon
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 7
- 논문 다운로드 링크(외부) https://doi.org/10.1016/j.electacta.2015.11.029
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
We simulate the electrochemical properties of Li-ion cells consisting of a blended cathode composed of LiMn2O4 and LiNi0.6Co0.2Mn0.2O2 and an artificial graphite anode using the Li-ion battery model available in COMSOL MULTIPHYSICS 4.4 along with a capacity fade model. The discharge profiles of the pure and blended cathodes at various current rates obtained through simulations and experimental results are well matched. By combining two capacity fade models available in literature, namely the solid electrolyte interphase (SEI) growth model and the Mn2+ dissolution model, the cycling performance of the pure LiMn2O4 cells at 25 °C are successfully simulated and found to be in a good agreement with the experimental results. The blended cathode exhibits better capacity retention than the pure LiMn2O4 during cycling. We also observed that at high powers, the gravimetric energy density of the LiMn2O4 cathode exceeds that of the LiNi0.6Co0.2Mn0.2O2 cathode; the reverse effect is seen at low powers. Further, we were able to easily modulate the energy and power densities of the blended cathode system by changing the blend ratio in our simulation model.
