Facile synthesis of Fe@Fe2O3 core-shell nanowires as O2 electrode for high-energy Li-O2 batteries

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• 作者：Fan Wang ; Xiangwei Wu ; Chen Shen ; Zhaoyin Wen
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：20
• 期：7
• 页码：1831-1836
• 全文大小：861 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Analytical Chemistry
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  Condensed Matter
  Electronic and Computer Engineering
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1433-0768
• 卷排序：20

文摘

Fe@Fe₂O₃ core-shell nanowires were synthesized via the reduction of Fe3+ ions by sodium borohydride in an aqueous solution with a subsequent heat treatment to form Fe₂O₃ shell and employed as a cathode catalyst for non aqueous Li-air batteries. The synthesized core-shell nanowires with an average diameter of 50–100 nm manifest superior catalytic activity for oxygen evolution reaction (OER) in Li-O₂ batteries with the charge voltage plateau reduced to ∼3.8 V. An outstanding performance of cycling stability was also achieved with a cutoff specific capacity of 1000 milliampere hour per gram over 40 cycles at a current density of 100 mA g−1. The excellent electrochemical properties of Fe@Fe₂O₃ as an O₂ electrode are ascribed to the high surface area of the nanowires’ structure and high electron conductivity. This study indicates that the resulting iron-containing nanostructures are promising catalyst in Li-O₂ batteries.KeywordsLithium-oxygen batteries; Fe@Fe₂O₃Core-shell nanowiresCatalystReduction reaction