Journal article
Synthesis of a metallic mesoporous pyrochlore as a catalyst for lithium-O-2 batteries
Nature chemistry, v 4(12), pp 1004-1010
01 Dec 2012
PMID: 23174980
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The lithium-O-2 'semi-fuel' cell based on the reversible reaction of Li and O-2 to form Li2O2 can theoretically provide energy densities that exceed those of Li-ion cells by up to a factor of five. A key limitation that differentiates it from other lithium batteries is that it requires effective catalysts (or 'promoters') to enable oxygen reduction and evolution. Here, we report the synthesis of a novel metallic mesoporous oxide using surfactant templating that shows promising catalytic activity and results in a cathode with a high reversible capacity of 10,000 mAh g(-1) (similar to 1,000 mAh g(-1) with respect to the total electrode weight including the peroxide product). This oxide also has a lower charge potential for oxygen evolution from Li2O2 than pure carbon. The properties are explained by the high fraction of surface defect active sites in the metallic oxide, and its unique morphology and variable oxygen stoichiometry. This strategy for creating porous metallic oxides may pave the way to new cathode architectures for the Li-O-2 cell.
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Details
- Title
- Synthesis of a metallic mesoporous pyrochlore as a catalyst for lithium-O-2 batteries
- Creators
- Si Hyoung Oh - University of WaterlooRobert Black - University of WaterlooEkaterina Pomerantseva - University of WaterlooJin-Hyon Lee - University of WaterlooLinda F. Nazar - University of Waterloo
- Publication Details
- Nature chemistry, v 4(12), pp 1004-1010
- Publisher
- Springer Nature
- Number of pages
- 7
- Grant note
- Natural Sciences and Engineering Council of Canada through its Strategic, Discovery, and Canada Research Chair programmes
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000311436400014
- Scopus ID
- 2-s2.0-84870205145
- Other Identifier
- 991020785741504721
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Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Multidisciplinary