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A solid with a hierarchical tetramodal micro-meso-macro pore size distribution

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ren2013ncomms2015.pdf (714.9Kb)
Date
06/2013
Author
Ren, Yu
Ma, Zhen
Morris, Russell E.
Liu, Zheng
Jiao, Feng
Dai, Sheng
Bruce, Peter G.
Funder
EPSRC
EPSRC
Grant ID
EP/K025112/1
EP/H003819/1
Keywords
Rechargeable lithium batteries
Ordered mesoporous materials
Molecular-sieve materials
Energy-storage
Metal-oxides
Facile synthesis
Silica
Carbon
Adsorption
N2O
QD Chemistry
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Abstract
Porous solids have an important role in addressing some of the major energy-related problems facing society. Here we describe a porous solid, alpha-MnO2, with a hierarchical tetramodal pore size distribution spanning the micro-, meso-and macro pore range, centred at 0.48, 4.0, 18 and 70 nm. The hierarchical tetramodal structure is generated by the presence of potassium ions in the precursor solution within the channels of the porous silica template; the size of the potassium ion templates the microporosity of alpha-MnO2, whereas their reactivity with silica leads to larger mesopores and macroporosity, without destroying the mesostructure of the template. The hierarchical tetramodal pore size distribution influences the properties of alpha-MnO2 as a cathode in lithium batteries and as a catalyst, changing the behaviour, compared with its counterparts with only micropores or bimodal micro/mesopores. The approach has been extended to the preparation of LiMn2O4 with a hierarchical pore structure.
Citation
Ren , Y , Ma , Z , Morris , R E , Liu , Z , Jiao , F , Dai , S & Bruce , P G 2013 , ' A solid with a hierarchical tetramodal micro-meso-macro pore size distribution ' , Nature Communications , vol. 4 , 2015 . https://doi.org/10.1038/ncomms3015
Publication
Nature Communications
Status
Peer reviewed
DOI
https://doi.org/10.1038/ncomms3015
ISSN
2041-1723
Type
Journal article
Rights
© 2013 Macmillan Publishers Limited. All rights reserved. This work is licensed under a Creative Commons Attribution- NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5065

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