Electrochemically synthesized nanoporous gold as a cathode material for Li-O2 batteries
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- 作者：Heng Yang ; Jiaxin Xia ; Loriana Bromberg…
- 关键词：Li ; O2 battery ; Nanoporous gold ; Reversibility ; Cyclic voltammetry
- 刊名：Journal of Solid State Electrochemistry
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：21
- 期：2
- 页码：463-468
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Physical Chemistry; Electrochemistry; Energy Storage; Characterization and Evaluation of Materials; Analytical Chemistry; Condensed Matter Physics;
- 出版者：Springer Berlin Heidelberg
- ISSN：1433-0768
- 卷排序：21
文摘
Nanoporous gold (NPG) prepared via chemical de-alloying has been recently shown to dramatically improve the reversibility and kinetics of Li-O2 batteries, but high cost makes its use as practical electrode material difficult. Recently developed electrochemical routines for synthesis of very thin NPG layers (<100 nm) on various low-cost substrates could potentially provide a feasible economic alternative. In this work, NPG on both gold and glassy carbon (GC) substrates was successfully synthesized via electrochemical de-alloying method and tested as cathode material in Li-O2 batteries. The results show that electrochemically synthesized NPG cathode cycles repeatedly with LiFePO4 anode. The voltage hysteresis is also significantly reduced when NPG is used in comparison with plain GC. Along with these results, challenges that need to be addressed for future implementation of NPG cathode in practical Li-O2 batteries are also discussed.