title: Structural Understanding of Superior Battery Properties of Partially Ni-Doped Li2MnO3 as Cathode Material.
abstract: We examined the crystal structures of Li2(NixMn1-x)O3(-δ) (x = 0, 1/10, 1/6, and 1/4) to elucidate the relationship between the structure and electrochemical performance of the compounds using neutron and synchrotron X-ray powder diffraction analyses in combination. Our examination revealed that these crystals contain a large number of stacking faults and exhibit significant cation mixing in the transition-metal layers; the cation mixing becomes significant with an increase in the Ni concentration. Charge-discharge measurements showed that the replacement of Mn with Ni lowers the potential of the charge plateau and leads to higher charge-discharge capacities. From a topological point of view with regard to the atomic arrangement in the crystals, it is concluded that substituting Mn in Li2MnO3 with Ni promotes the formation of smooth Li percolation paths, thus increasing the number of active Li ions and improving the charge-discharge capacity.
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University , Gokasho, Uji, Kyoto 611-0011, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Matsunaga
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University , Gokasho, Uji, Kyoto 611-0011, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Komatsu
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University , Gokasho, Uji, Kyoto 611-0011, Japan.
authors.forename: Keiji
authors.initials: K
authors.lastname: Shimoda
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University , Gokasho, Uji, Kyoto 611-0011, Japan.
authors.forename: Taketoshi
authors.initials: T
authors.lastname: Minato
authors.affiliation: Neutron Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization , 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: Masao
authors.initials: M
authors.lastname: Yonemura
authors.affiliation: Neutron Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization , 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kamiyama
authors.affiliation: Nanostructures Research Laboratory, Japan Fine Ceramics Center , 2-4-1 Mutsuno, Atsuta, Nagoya 456-8587, Japan.
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Kobayashi
authors.affiliation: Nanostructures Research Laboratory, Japan Fine Ceramics Center , 2-4-1 Mutsuno, Atsuta, Nagoya 456-8587, Japan.
authors.forename: Takeharu
authors.initials: T
authors.lastname: Kato
authors.affiliation: Nanostructures Research Laboratory, Japan Fine Ceramics Center , 2-4-1 Mutsuno, Atsuta, Nagoya 456-8587, Japan.
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Hirayama
authors.affiliation: Nanostructures Research Laboratory, Japan Fine Ceramics Center , 2-4-1 Mutsuno, Atsuta, Nagoya 456-8587, Japan.|Institute of Engineering Innovation, University of Tokyo , 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Ikuhara
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University , Gokasho, Uji, Kyoto 611-0011, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Arai
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University , Gokasho, Uji, Kyoto 611-0011, Japan.
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Ukyo
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University , Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan.
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Uchimoto
authors.affiliation: Office of Society-Academia Collaboration for Innovation, Kyoto University , Gokasho, Uji, Kyoto 611-0011, Japan.
authors.forename: Zempachi
authors.initials: Z
authors.lastname: Ogumi