Title :
Formation of hierarchical LiMn2O4 dual-porous nanostructures by pyrolysis of gel precursor
Author :
Yanhua Tong ; Yingying Li ; Wanyu Lv ; Zhenzhen Zhao ; Min Zhang
Author_Institution :
Dept. of Chem., Huzhou Teachers Coll., Huzhou, China
Abstract :
A precursor-pyrolysing route to fabricate hierarchical LiMn2O4 porous nanostructures is presented. The product was characterised by X-ray powder diffraction, scanning electron microscopy, a transmission electron microscope, a high-resolution transmission electron microscope and a micromeritics analyser. The results show that the resulting material is a honeycomb-like dual-porous structure. One is quasi-hemispherical macropores of several hundred nanometres and the other is slit mesopores of several nanometres. This dual-porous nanostructure is composed of many ultrafine nanocrystallines whose size mainly falls into the range from 3 to 10 nm. Moreover, it has a large Brunauer-Emmett-Teller-specific surface area of 116 m2/g. The formation of such dual pores should be attributed to the Kirkendall effect and surface diffusion.
Keywords :
X-ray diffraction; chemical interdiffusion; lithium compounds; nanofabrication; nanoporous materials; pyrolysis; scanning electron microscopy; surface diffusion; transmission electron microscopy; Brunauer-Emmett-Teller-specific surface area; Kirkendall effect; LiMn2O4; X-ray powder diffraction; gel precursor; hierarchical dual-porous nanostructures; high-resolution transmission electron microscopy; honeycomb-like dual-porous structure; micrometrics; pyrolysis; quasihemispherical macropores; scanning electron microscopy; slit mesopores; surface diffusion;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2013.0101