Core鈥揝hell Layered Double Hydroxide Microspheres with Tunable Interior Architecture for Supercapacitors
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- 作者：Mingfei Shao ; Fanyu Ning ; Yufei Zhao ; Jingwen Zhao ; Min Wei ; David G. Evans ; Xue Duan
- 刊名：Chemistry of Materials
- 出版年：2012
- 出版时间：March 27, 2012
- 年：2012
- 卷：24
- 期：6
- 页码：1192-1197
- 全文大小：364K
- 年卷期：v.24,no.6(March 27, 2012)
- ISSN：1520-5002
文摘
Core鈥搒hell layered double hydroxide microspheres with tunable interior architecture have been synthesized by a facile and cost-effective in situ growth method. The SEM and TEM images revealed that the obtained microspheres display a three-dimensional architecture with core鈥搒hell, yolk鈥搒hell, and hollow interior structure respectively, with continuous changes in specific surface area and pore-size distribution. Moreover, the hollow NiAl-LDH microspheres exhibit excellent pseudocapacitance performance, including high specific capacitance and rate capability, good charge/discharge stability and long-term cycling life, owing to the greatly improved faradaic redox reaction and mass transfer. Therefore, this work provides a promising approach for the design and synthesis of structure tunable materials with largely enhanced supercapacitor behavior, which can be potentially applied in energy storage/conversion devices.