title: Ionic Conduction in Lithium Ion Battery Composite Electrode Governs Cross-sectional Reaction Distribution.
abstract: Composite electrodes containing active materials, carbon and binder are widely used in lithium-ion batteries. Since the electrode reaction occurs preferentially in regions with lower resistance, reaction distribution can be happened within composite electrodes. We investigate the relationship between the reaction distribution with depth direction and electronic/ionic conductivity in composite electrodes with changing electrode porosities. Two dimensional X-ray absorption spectroscopy shows that the reaction distribution is happened in lower porosity electrodes. Our developed 6-probe method can measure electronic/ionic conductivity in composite electrodes. The ionic conductivity is decreased for lower porosity electrodes, which governs the reaction distribution of composite electrodes and their performances.
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Orikasa
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Yuma
authors.initials: Y
authors.lastname: Gogyo
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University, Uji, 611-0011, Japan.
authors.forename: Hisao
authors.initials: H
authors.lastname: Yamashige
authors.affiliation: Department of Applied Chemistry, Ritsumeikan University, Kusatsu, 525-8577, Japan.
authors.forename: Misaki
authors.initials: M
authors.lastname: Katayama
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Kezheng
authors.initials: K
authors.lastname: Chen
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Mori
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yamamoto
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Titus
authors.initials: T
authors.lastname: Masese
authors.affiliation: Department of Applied Chemistry, Ritsumeikan University, Kusatsu, 525-8577, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Inada
authors.affiliation: Research Organization of Science and Engineering, Ritsumeikan University, Kusatsu, 525-8577, Japan.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Ohta
authors.affiliation: National Institute of Advanced Industrial Science and Technology, Ikeda, 563-8577, Japan.
authors.forename: Zyun
authors.initials: Z
authors.lastname: Siroma
authors.affiliation: KRI Inc., Kyoto, 600-8813, Japan.
authors.forename: Shiro
authors.initials: S
authors.lastname: Kato
authors.affiliation: KRI Inc., Kyoto, 600-8813, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Kinoshita
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University, Uji, 611-0011, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Arai
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University, Uji, 611-0011, Japan.
authors.forename: Zempachi
authors.initials: Z
authors.lastname: Ogumi
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Uchimoto