[14p-4B-1~8] 10.5 Application of magnetic field

▼ [14p-4B-4] Synthesis and magnetic alignment of layered sodium cobaltite

〇TAKESHI HAGIO¹, KAZUHIKO IWAI¹, KAZUSHIGE YAMAUCHI², YUKI KAMIMOTO³, RYOICHI ICHINO^3,4 (1.Hokkaido Univ., 2.Nagoya Univ., 3.Nagoya Univ. GREMO, 4.Nagoya Univ. EcoTopia)

Keywords:layered sodium cobaltite,synthesis,magnetic alignment

Layered sodium cobaltite (Na_xCoO₂) is known as a high performance thermoelectric material and is also expected to be a promising cathode material for sodium ion secondary batteries. Various properties of Na_xCoO₂ are highly dependent on crystal orientation as a result of its layered structure. Control of crystal alignment is therefore important when it is used in the polycrystalline form. Meanwhile, magnetic alignment is a powerful method to control crystal alignment of polycrystals composed of anisotropic crystals like Na_xCoO₂. Here, we report the synthesis of Na_xCoO₂ and results of magnetic alignment experiments performed by slip casting of a suspension containing Na_xCoO₂ crystals under a magnetic field of up to 4T.