%0 Journal Article
%T Effects of Microstructure on Electrode Properties of Nanosheet-Derived Hx(Ni1/3Co1/3Mn1/3)O2 for Electrochemical Capacitors
%A Masato Yano
%A Shinya Suzuki
%A Masaru Miyayama
%A Masataka Ohgaki
%J Nanomaterials
%D 2013
%I MDPI AG
%R 10.3390/nano3020204
%X Nanosheet-derived H x(Ni 1/3Co 1/3Mn 1/3)O 2 was prepared by restacking (Ni 1/3Co 1/3Mn 1/3)O 2 nanosheets with large or small lateral sizes and their electrochemical properties in a 1 M KOH aqueous solution; microstructural factors were compared with those of bulk H x(Ni 1/3Co 1/3Mn 1/3)O 2 (HNCM). The electrodes composed of small nanosheets exhibited very large capacitances of 1241 F¡¤g £¿1 (395 mAh¡¤g £¿1) at a current density of 50 mA¡¤g £¿1, and 430 F¡¤g £¿1 (100 mAh¡¤g £¿1) at a large current density of 1000 mA¡¤g £¿1. These large capacitances resulted from a heterogeneous layer structure with a large surface area and pore volume. The electrodes of large nanosheets, with a strongly interconnected microstructure and a surface area slightly larger than that of HNCM, exhibited good cycle stability and capacitances larger than that of HNCM. Microstructural control through the restacking of (Ni 1/3Co 1/3Mn 1/3)O 2 nanosheets improved the electrochemical properties of H x(Ni, Co, Mn)O 2.
%K nanosheets
%K Hx(Ni
%K Co
%K Mn)O2
%K layer-structured materials
%K electrochemical capacitors
%K energy storage devices
%U http://www.mdpi.com/2079-4991/3/2/204