Rechargeable Iron-Ion Battery Using a Pure Ionic Liquid Electrolyte.

A rechargeable iron-ion battery (Fe-ion battery) has been fabricated in our laboratory using a pure ionic liquid electrolyte. Magnetic ionic liquids of 1-butyl-3-methylimidazolium tetrachloroferrate (BmimFeCl) and 1-methyl-3-octylimidazolium tetrachloroferrate (OmimFeCl) are synthesized and utilized as electrolytes in this work. The chemical structure of the two ionic liquids (ILs) is investigated using Raman analysis.

Electrochromic properties of WO thin films: The role of film thickness.

Tungsten oxide (WO) thin films with various thicknesses of approximately 36, 72, 108, and 180 nm were prepared using radio frequency sputtering method. Film thickness can be controlled at nanoscale. In addition, X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy were utilized for investigating morphologies and microstructures of as-prepared WO thin films.