Preparation and Li+ storage properties of hierarchical hollow porous carbon spheres--颗粒学报PARTICUOLOGY

Wu, X., Tang, W., Jiao, K., & Chen, Y. (2014). Preparation and Li+ storage properties of hierarchical hollow porous carbon spheres. Particuology, 14, 44–50. https://doi.org/10.1016/j.partic.2013.05.002

Preparation and Li⁺ storage properties of hierarchical hollow porous carbon spheres

Xiaofeng Wu ^a, Wenxiang Tang ^{a b}, Kejia Jiao ^{a b}, Yunfa Chen ^a *

a State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
b Graduate University of Chinese Academy of Sciences, Beijing 100049, China

10.1016/j.partic.2013.05.002

Volume 14, June 2014, Pages 44-50

Received 6 July 2012, Revised 3 May 2013, Accepted 3 May 2013, Available online 17 July 2013.

E-mail: yfchen@mail.ipe.ac.cn

Highlights

• HOPCS was prepared using HOMSS as a template.

• Ordering of pore stacking was attributed to tangential compression in spherical geometry.

• HOPCSs performed a high first specific capacity of 527.6 mA h/g and good cycle performance.

Abstract

Hollow ordered porous carbon spheres (HOPCS) with a hierarchical structure were prepared by templating with hollow ordered mesoporous silica spheres (HOMSS). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that HOPCS exhibited a spherical hollow morphology. High-resolution TEM, small angle X-ray diffraction (SAXRD) and N₂ sorption measurements confirmed that HOPCS inversely replicated the unconnected hexagonal-stacked pore structure of HOMSS, and possessed ordered porosity. HOPCS exhibited a higher storage capacity for Li⁺ ion battery (LIB) of 527.6 mA h/g, and good cycling performance. A large capacity loss during the first discharge–charge cycle was found attributed to the high content of micropores. The cycling performance was derived from the hierarchical structure.

Graphical abstract

Keywords

Hierarchical structure; MCM-41 silica; Nanostructured carbon; Lithium storage

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