title: Na(+) diffusion kinetics in nanoporous metal-hexacyanoferrates.
abstract: Metal-hexacyanoferrates (metal-HCFs) are promising candidates for cathode materials of sodium-ion secondary batteries (SIBs). Here, we systematically investigated Na(+) diffusion constants (D) and the activation energies (Ea) of metal-HCFs against the framework size (= a/2). We found that the magnitude of D (Ea) systematically increases (decreases) with increases in a, indicating that steric hindrance plays a dominant role in Na(+) diffusion.
authors.affiliation: Graduate School of Pure & Applied Science, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-7571, Japan. moritomo.yutaka.gf@u.tsukuba.ac.jp.
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Takachi
authors.affiliation: Graduate School of Pure & Applied Science, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-7571, Japan. moritomo.yutaka.gf@u.tsukuba.ac.jp.
authors.forename: Yuya
authors.initials: Y
authors.lastname: Fukuzumi
authors.affiliation: Graduate School of Pure & Applied Science, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-7571, Japan. moritomo.yutaka.gf@u.tsukuba.ac.jp and Faculty of Pure & Applied Science, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-7571, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Moritomo