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A new type of transparent thin films, based on two-phase materials of CeO 2 -SiO 2 , was developed. The films were prepared on indium tin oxide (ITO)-coated glass via a sol-gel process. A study of cyclic voltammetry was conducted on the films, using an electrolyte of 1 M LiClO 4 in propylene carbonate. Li + insertion/disinsertion took place in the film. For a 25 nm...