We have studied many kinds of nanostructural control processes of active materials for electrodes. In these days, we focus the crystalinity of the materials and easy fabrication processes. We reported fabrication of single crystalline nanowires of LiMnxFe1-xPO4 and mesocrystal nanowires constructed by oriented LiMn0.4Fe0.6PO4 grains by electrospinning methods.1-3 Moreover, we have studied Na-ion batteries, which are expected as low cost secondary batteries because sodium is abundant element.
Here, we report the fabrication of mesocrystal nanowires constructed by Na3V2(PO4)3 oriented nanoparticles by electrospinning method and the battery-performances as Na-ion batteries.4 In addition, we report the soft X-ray adsorption spectroscopy of the materials for understanding about the mechanism of Na insertion/extraction
 K. Kagesawa, E. Hosono, et al., CrystEngComm, 2013, 15, 6638.
 K. Kagesawa, E. Hosono, et al., J. Power Sources, 2014, 248, 615.
 J. Kikkawa, E. Hosono, et al., J. Phys. Chem. C, 2014, 118, 7678.
 S. Kajiyama, E. Hosono, et al., Chem. Eur. J.2014, 20, 12636.