Electrode designs of lithium ion batteries utilizing the simulation of porous structures

Kazuki Ikeshita, Gen Inoue, Motoaki Kawase

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationLi-Ion Batteries
EditorsR. Kostecki, D. Guyomard, G. Koenig, M. Winter, Christopher Johnson, Y. Cui, Y. Zhang, Y. Fukunaka
PublisherElectrochemical Society Inc.
Pages165-172
Number of pages8
Edition20
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 2016
Externally publishedYes
EventLi-Ion Batteries A03 Battery Symposium - PRiME 2016/230th ECS Meeting - Honolulu, United States
Duration: Oct 2 2016Oct 7 2016

Publication series

NameECS Transactions
Number20
Volume75
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

OtherLi-Ion Batteries A03 Battery Symposium - PRiME 2016/230th ECS Meeting
CountryUnited States
CityHonolulu
Period10/2/1610/7/16

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Ikeshita, K., Inoue, G., & Kawase, M. (2016). Electrode designs of lithium ion batteries utilizing the simulation of porous structures. In R. Kostecki, D. Guyomard, G. Koenig, M. Winter, C. Johnson, Y. Cui, Y. Zhang, ... Y. Fukunaka (Eds.), Li-Ion Batteries (20 ed., pp. 165-172). (ECS Transactions; Vol. 75, No. 20). Electrochemical Society Inc.. https://doi.org/10.1149/07520.0165ecst