期刊
APPLIED PHYSICS LETTERS
卷 105, 期 16, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4899069
关键词
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资金
- European Research Council under the European Community [267234]
Ni-oxide-based thin films were produced by reactive direct-current magnetron sputtering and were characterized by X-ray diffraction and Rutherford backscattering spectroscopy. Intercalation of Li+ ions was accomplished by cyclic voltammetry (CV) in an electrolyte of LiClO4 in propylene carbonate, and electrochromism was documented by spectrophotometry. The charge density exchange, and hence the optical modulation span, decayed gradually upon repeated cycling. This phenomenon was accurately described by an empirical power law, which was valid for at least 10(4) cycles when the applied voltage was limited to 4.1V vs Li/Li+. Our results allow lifetime assessments for one of the essential components in an electrochromic device such as a smart window for energy-efficient buildings. (C) 2014 AIP Publishing LLC.
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