TY - GEN
T1 - Electrode designs of lithium ion batteries utilizing the simulation of porous structures
AU - Ikeshita, Kazuki
AU - Inoue, Gen
AU - Kawase, Motoaki
N1 - Funding Information:
This research was supported by the Precursory Research for Embryonic Science and Technology (PRESTO) program in the research field of "Phase Interfaces for Highly Efficient Energy Utilization" of the Japan Science and Technology Agency (JST).
Publisher Copyright:
© The Electrochemical Society.
PY - 2016
Y1 - 2016
N2 - The development of high capacity anode active materials for lithium-ion batteries has been hindered by the expansion of these materials during charging, and it is currently unclear how electrode design should be modified to account for this. We herein investigate the effects of the volumetric expansion ratio of active materials on charge capacity using numerical simulations that consider the expansion of these active materials. Charging properties were calculated using equations based on the porous electrode theory and expressing the parameter changes caused by expansion. The charge capacity was found to vary with both the C-rate and with structure conditions when compared with the case where expansion did not take place "no expansion" case depending on C-rate and structure conditions. In this context, with an electrode thickness of 60 μm, an active material volume fraction of 0.6, and a volumetric expansion ratio of 2.0, the capacity decreased to 27% at 10C. These results indicate the importance of electrode design in the presence of expanding active materials, and also suggest that it is possible to quantitatively design porous electrodes using this calculation method.
AB - The development of high capacity anode active materials for lithium-ion batteries has been hindered by the expansion of these materials during charging, and it is currently unclear how electrode design should be modified to account for this. We herein investigate the effects of the volumetric expansion ratio of active materials on charge capacity using numerical simulations that consider the expansion of these active materials. Charging properties were calculated using equations based on the porous electrode theory and expressing the parameter changes caused by expansion. The charge capacity was found to vary with both the C-rate and with structure conditions when compared with the case where expansion did not take place "no expansion" case depending on C-rate and structure conditions. In this context, with an electrode thickness of 60 μm, an active material volume fraction of 0.6, and a volumetric expansion ratio of 2.0, the capacity decreased to 27% at 10C. These results indicate the importance of electrode design in the presence of expanding active materials, and also suggest that it is possible to quantitatively design porous electrodes using this calculation method.
UR - http://www.scopus.com/inward/record.url?scp=85025130385&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85025130385&partnerID=8YFLogxK
U2 - 10.1149/07520.0165ecst
DO - 10.1149/07520.0165ecst
M3 - Conference contribution
AN - SCOPUS:85025130385
T3 - ECS Transactions
SP - 165
EP - 172
BT - Li-Ion Batteries
A2 - Johnson, Christopher
A2 - Cui, Y.
A2 - Zhang, Y.
A2 - Koenig, G.
A2 - Kostecki, R.
A2 - Guyomard, D.
A2 - Winter, M.
A2 - Fukunaka, Y.
PB - Electrochemical Society Inc.
T2 - Li-Ion Batteries A03 Battery Symposium - PRiME 2016/230th ECS Meeting
Y2 - 2 October 2016 through 7 October 2016
ER -
