School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University , Xuzhou, Jiangsu 221116, China.
Institute for Superconducting & Electronic Materials, University of Wollongong , Wollongong, NSW 2522, Australia.
ACS Appl Mater Interfaces. 2016 Jul 13;8(27):17226-32. doi: 10.1021/acsami.6b03966. Epub 2016 Jun 28.
Porous mixed metal oxide (MMO) hollow spheres present high specific surface areas, abundant electrochemically active sites, and outstanding electrochemical properties, showing potential applications in energy storage. A hydro/solvothermal process, followed by a calcination process, can be a viable method for producing uniform porous metal oxide hollow spheres. Unfortunately, this method usually involves harsh synthetic conditions such as high temperature and intricate processing. Herein, we report a general and facile "ion adsorption-annealing" approach for the fabrication of uniform porous MMO hollow spheres. The size and shell thickness of the as-obtained hollow spheres can be adjusted by the carbohydrate sphere templates and the solution concentration. Electrochemical measurements of the MMO hollow spheres demonstrate excellent supercapacitive properties, which may be due to the small size, ultrathin shells, and fine porous structure.
多孔混合金属氧化物 (MMO) 空心球具有高比表面积、丰富的电化学活性位点和优异的电化学性能，在储能方面具有潜在的应用。水/溶剂热法，再加上煅烧过程，是一种生产均匀多孔金属氧化物空心球的可行方法。然而，这种方法通常涉及苛刻的合成条件，如高温和复杂的处理。在此，我们报告了一种通用且简便的“离子吸附-退火”方法来制备均匀多孔 MMO 空心球。所获得的空心球的尺寸和壳层厚度可以通过碳水化合物球模板和溶液浓度来调节。MMO 空心球的电化学测量显示出优异的超级电容性能，这可能归因于其小尺寸、超薄壳层和精细的多孔结构。
