Formation of hierarchical LiMn2O4 dual‐porous nanostructures by pyrolysis of gel precursor. (1st May 2013)

• Record Type: Journal Article
• Authors: Tong, Yanhua; Li, Yingying; Lv, Wanyu; Zhao, Zhenzhen; Zhang, Min
• Is Part Of: Micro & nano letters. Volume 8:Number 5(2013)
• Page Start: 225
• Page End: 228
• Publication Date: 2013-05-01
• Subjects: chemical interdiffusion -- lithium compounds -- nanofabrication -- nanoporous materials -- pyrolysis -- scanning electron microscopy -- surface diffusion -- transmission electron microscopy -- X‐ray diffraction; hierarchical dual‐porous nanostructures -- pyrolysis -- X‐ray powder diffraction -- gel precursor -- scanning electron microscopy -- high‐resolution transmission electron microscopy -- slit mesopores -- quasihemispherical macropores -- Brunauer‐Emmett‐Teller‐specific surface area -- Kirkendall effect -- surface diffusion -- micrometrics -- honeycomb‐like dual‐porous structure -- LiMn2O4; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2013.0101
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : A precursor‐pyrolysing route to fabricate hierarchical LiMn2 O4 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 m 2 /g. The formation of such dual pores should be attributed to the Kirkendall effect and surface diffusion.