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Showing 1–5 of 5 results
Advanced filters: Author: Tetsu Ichitsubo Clear advanced filters

  • Rechargeable magnesium batteries promise high energy density but are hindered by sluggish Mg diffusion and poor electrolyte compatibility in oxide cathodes. Here, an amorphous Mg–Li–Ti–Mo oxide with high free volume enables reversible Mg insertion at room temperature, delivering 150 mAh g−1 and long cycle life.

    • Tomoya Kawaguchi
    • Hikari Sakurai
    • Tetsu Ichitsubo
    ResearchOpen Access
    Communications Materials
    Volume: 6, P: 1-10

  • There are few well-balanced heat storage materials up to date. Here, the authors report that δ-type K0.33MnO2 ∙ nH2O can be an excellently balanced heat storage material exhibiting a “water-intercalation mechanism”.

    • Takuya Hatakeyama
    • Norihiko L. Okamoto
    • Tetsu Ichitsubo
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9

  • Alloy anode materials in lithium batteries usually suffer from fatal structural degradation due to the large volume change during cycling. Here the authors report a design in which Al foil serves as both anode and current collector to circumvent the strain.

    • Hongyi Li
    • Takitaro Yamaguchi
    • Tetsu Ichitsubo
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-8

  • Layered MnO2 has the ability to reversibly store and release thermal energy through rapid water intercalation, but its heat storage capacity is limited by the available space between layers. Here, the authors show that reducing the crystallite size to a few tens of nanometers facilitates surface water adsorption in addition to intercalation in the bulk, enabling a 1.3 times increase in heat storage capacity.

    • Hiroki Yoshisako
    • Norihiko L. Okamoto
    • Tetsu Ichitsubo
    ResearchOpen Access
    Communications Chemistry
    Volume: 8, P: 1-9

  • We evaluated the liquid fragility and structural and dynamic heterogeneity of glassy solids. The most fragile alloy exhibited the maximum dynamic heterogeneity in the mechanical unfreezing process. We observed that atomic displacement significantly correlated with degrees of clustering of local atomic orders. The clustering produced during the glass-forming quenching process enhanced structural and dynamic heterogeneities. Therefore, there are correlations among liquid fragility, dynamic heterogeneity in liquid alloys, and dynamic and structural heterogeneities in glassy solids. In addition, the alloy with the most fragility exhibited the largest difference in atomic mobility between the densely and loosely packed local atomic orders.

    • Masato Wakeda
    • Tetsu Ichitsubo
    ResearchOpen Access
    NPG Asia Materials
    Volume: 15, P: 1-13