High rate SnO2-Graphene Dual Aerogel anodes and their kinetics of lithiation and sodiation

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DOIResolve DOI: http://doi.org/10.1016/j.nanoen.2015.04.018
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TypeArticle
Journal titleNano Energy
ISSN2211-2855
Volume15
Pages369378; # of pages: 10
SubjectAerogels; Capacitors; Electrodes; Graphene; Ions; Lithium alloys; Lithium-ion batteries; Metal ions; Tin; Tin oxides; Battery; Conversion reactions; ELectrochemical methods; High reversible capacities; Lithium ions; Rate capabilities; Sodium ion batteries; Sodium ions; Lithium
AbstractWe created a unique SnO<inf>2</inf>-Graphene Dual Aerogel (SnO<inf>2</inf>/GDA) nanocomposite with exquisite lithium and sodium ion battery anode performance (LIB, NIB NAB SIB). In parallel we employed electrochemical methods to be the first to analyze the transition from kinetic control to diffusion control for the conversion reaction (SnO<inf>2</inf>+4Li++4e-↔Sn+2Li<inf>2</inf>O) vs. for the alloying reaction (Sn+xLi++xe-↔Li<inf>x</inf>Sn, x≤4.4). The material displays a high reversible capacity (1299mAhg-1 for Li at 0.1Ag-1, 448mAhg-1 for Na at 0.05Ag-1), very good cycling life (148% after 450 cycles for Li, 82% from 20 to 200 cycles for Na), and superb rate capacity retention (450mAhg-1 for Li at 25Ag-1, 184mAhg-1 for Na at 1 Ag-1). In fact, these rate capabilities are among the most favorable reported in literature for each system.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology
Peer reviewedYes
NPARC number21275828
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Record identifier35b36702-39f3-4820-a47e-cc13a2933b4d
Record created2015-07-14
Record modified2016-05-09
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