Tunable Properties of Mg-Doped V2O5 Thin Films for Energy Applications: Li-Ion Batteries and Electrochromics

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• 作者：Marianthi PanagopoulouDimitra Vernardou ; Emmanuel Koudoumas ; Nikos Katsarakis ; Dimitris Tsoukalas ; Yannis S. Raptis
• 刊名：Journal of Physical Chemistry C
• 出版年：2017
• 出版时间：January 12, 2017
• 年：2017
• 卷：121
• 期：1
• 页码：70-79
• 全文大小：723K
• ISSN：1932-7455

文摘

Vanadium pentoxide (V₂O₅) is doped for the first time with Mg, and the influence of Mg content on the films properties and functionality is investigated in detail, emphasis given on the electrochemical and electrochromic response. The Mg-doped V₂O₅ films exhibit characteristics suitable for lithium ion batteries and electrochromic window applications, the optimization of the functionality depending on the Mg content. Low Mg content (2 at. % Mg) appears to favor lithium ion battery applications, the corresponding films exhibiting high specific discharge capacity, increased diffusion coefficient, and high capacity retention. In contrast, high Mg content (15 at. % Mg) is more favorable for electrochromic windows, presenting fast switching response time, high coloration efficiency, and high visible transmittance. In both cases, the determined characteristics are superior or at least equivalent to those reported for V₂O₅ doped with other transition metals. The obtained results clearly indicate that tuning of the Mg doping enables the growth of thin films with application-centered characteristics.