Hydrothermal synthesis and electrochemical properties of FeNbO4 nanospheres

Hyun-Woo SHIM, In-Sun CHO, Kug Sun HONG, Ah-Hyeon LIM, Dong-Wan KIM
2012 Journal of the Ceramic Society of Japan  
Iron niobate (FeNbO 4 ) nanospheres of an orthorhombic structure were synthesized using a hydrothermal (HT) process at 250°C, and were characterized using X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, and BrunauerEmmettTeller (BET) measurements. The FeNbO 4 nanospheres obtained through the HT reaction revealed a uniform size with an average diameter of 510 nm, and a larger specific surface area (82.72 m 2 g ¹1 ) than that of
more » ... k FeNbO 4 powder (2.51 m 2 g ¹1 ) prepared by a solid-state reaction. In addition, the electrochemical properties of the FeNbO 4 powders versus Li were evaluated using cyclic voltammetry and galvanostatic charge/discharge cycling. Importantly, the FeNbO 4 nanospheres delivered a reversible capacity of over 200 mAh g ¹1 after 20 cycles, and provided an enhanced rate capability compared to the bulk material.
doi:10.2109/jcersj2.120.82 fatcat:zuloxgg3h5dnzcte746gqs6tzu