三氧化钨
材料科学
化学工程
复合数
介电谱
二氧化钛
纳米颗粒
水热合成
循环伏安法
氧化物
电化学
兴奋剂
热液循环
钨
无机化学
纳米技术
化学
冶金
复合材料
电极
光电子学
物理化学
工程类
作者
Bhupender Pal,Bincy Lathakumary Vijayan,Syam G. Krishnan,Midhun Harilal,Wan Jeffrey Basirun,Adrian Lowe,Mashitah M. Yusoff,Rajan Jose
标识
DOI:10.1016/j.jallcom.2018.01.065
摘要
Synthesis of advanced functional materials through scalable processing routes using greener approaches is essential for process and product sustainability. In this article, syntheses of nanoparticles of titanium dioxide (TiO2), tungsten trioxide (WO3), WO3-doped titanium dioxide (W-TiO2) and TiO2/WO3 composite at hydrothermal conditions using corresponding metal oxide precursors are described. Electrochemical charge storage capabilities of the above materials are measured using cyclic voltammetry, charge-discharge cycling and electrochemical impedance spectroscopy in aqueous KOH electrolyte. The TiO2 and the WO3 nanoparticle showed a specific charge (Q) of ∼12 and ∼36 mA h g−1 at a current density of 2 A g−1 in 6 M KOH, respectively. The Q of TiO2 increased upon W doping up to 25 mA h g−1 for 5 wt% W-TiO2 and the WO3/TiO2 composite showed the highest storage capability (Q ∼40 mA h g−1). Changes in the charge storage capabilities of the doped and composite materials have been correlated to materials properties.
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