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Pseudocapacitive behavior of the Fe₂O₃ anode and its contribution to high reversible capacity in lithium ion batteries

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dc.contributor.authorXiang, Y.
dc.contributor.authorYang, Z.
dc.contributor.authorWang, S.
dc.contributor.authorHossain, M.
dc.contributor.authorYu, J.
dc.contributor.authorKumar, N.
dc.contributor.authorYamauchi, Y.
dc.date.issued2018
dc.description.abstractPseudocapacitance, which is the storage of charge based on continuous and fast reversible redox reactions at the surface of electrode materials, is commonly observed for electrodes in lithium ion batteries, especially for transition metal oxide anodes. In this report, bare Fe2O3 of granular morphology (∼30 nm in diameter) with high purity and decent crystallinity as well as recommendable electrochemical performances is fabricated hydrothermally and employed as the subject to clarify pseudocapacitive behavior in transition metal oxide anodes. Electrochemical technologies such as galvanostatic charging/discharging, differential capacity analysis (dQ/dV) and the power law relationship (i = aνb), which can distinguish pseudocapacitive behaviors of an electrode reaction were employed to analyze the electrodes. Reversible capacities of ∼120 mA h g-1 (0.117 F cm-2) for Fe2O3 were found within particular electrochemical windows (2.3-3.0 V, 0.3-0.8 V for discharging and 2.2-3.0 V, 0.3-1.3 V for charging). A new direction of optimizing the capacities, rate and cycling performances for lithium ion batteries is pointed out with connections between the pseudocapacitive behavior and morphologies of surfaces as well as structures of the electrodes.
dc.description.statementofresponsibilityYimo Xiang, Zhigao Yang, Shengping Wang, Md. Shahriar A. Hossain, Jingxian Yu, Nanjundan Ashok Kumar and Yusuke Yamauchi
dc.identifier.citationNanoscale, 2018; 10(37):18010-18018
dc.identifier.doi10.1039/c8nr04871a
dc.identifier.issn2040-3364
dc.identifier.issn2040-3372
dc.identifier.orcidYu, J. [0000-0002-6489-5988]
dc.identifier.urihttp://hdl.handle.net/2440/117409
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.relation.granthttp://purl.org/au-research/grants/arc/FT150100479
dc.rightsThis journal is © The Royal Society of Chemistry 2018
dc.source.urihttps://doi.org/10.1039/c8nr04871a
dc.titlePseudocapacitive behavior of the Fe₂O₃ anode and its contribution to high reversible capacity in lithium ion batteries
dc.title.alternativePseudocapacitive behavior of the Fe(2)O(3) anode and its contribution to high reversible capacity in lithium ion batteries
dc.typeJournal article
pubs.publication-statusPublished

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