Cycling stability of iron-based layered double hydroxide thin-films for battery-type electrode materials
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- 作者：Jing Han ; Hong-Yan Zeng ; Xi Cao…
- 刊名：Journal of Materials Science: Materials in Electronics
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：28
- 期：3
- 页码：2754-2762
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
- 出版者：Springer US
- ISSN：1573-482X
- 卷排序：28
文摘
The [Fe(CN)6]3− intercalated Mg/Fe-LDH (LDH-CN) thin film was prepared by the intercalation-reconstruction method. By using a three-electrode system, the electrochemical performance of the film was also investigated to evaluate the cycling stability for its potential as electrode materials. The LDH-CN thin film was characterized by XRD, FT-IR, SEM and TG-DSC, indicating that the microstructure and surface morphology of the films remained basically unchanged before and after CV scanning for 50 cycles. Redox cycling of the LDH-CN/GCE kept a strong stability at 100 mV s−1 for 50 cycles by virtue of the stability of the microstructure of the LDH-CN thin film. Such stability was likely imparted by the formation of a network of mixed-valent Fe2+/3+ oxo-bridges that underwent chemical reactions and electrochemical reactions as main capacitive charge storage ions. The LDH-CN electrode presented a maximum specific capacity of 147.2 mAh g−1 and excellent cycle life, while it still exhibited 133.9 mAh g−1 at the 1000th cycle at a current density of 3 A g−1. Such a thin-film electrode made up of the LDH-CN material may be a potential economical alternative battery-type electrode material and possess electrochemical capacitors possibilities.