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Highly crystalline mesoporous phosphotungstic acid: a high-performance electrode material for energy-storage applications

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dc.contributor.authorIlbeygi, H.
dc.contributor.authorKim, I.Y.
dc.contributor.authorKim, M.G.
dc.contributor.authorCha, W.
dc.contributor.authorKumar, P.S.M.
dc.contributor.authorPark, D.H.
dc.contributor.authorVinu, A.
dc.date.issued2019
dc.description.abstractHeteropoly acids (HPAs) are unique materials with interesting properties, including high acidity and proton conductivity. However, their low specific surface area and high solubility in polar solvents make them unattractive for catalytic or energy applications. This obstacle can be overcome by creating nanoporosity within the HPA. We synthesized mesoporous phosphotungstic acid (mPTA) with a spherical morphology through the self‐assembly of phosphotungstic acid (PTA) with a polymeric surfactant as stabilized by KCl and hydrothermal treatment. The mPTA nanostructures had a surface area of 93 m2 g−1 and a pore size of 4 nm. Their high thermal stability (ca. 450 °C) and lack of solubility in ethylene carbonate/diethyl carbonate (EC/DEC) electrolyte are beneficial for lithium‐ion batteries (LIBs). Optimized mPTA showed a reversible capacity of 872 mAh g−1 at 0.1 A g−1 even after 100 cycles for LIBs, as attributed to a super‐reduced state of HPA and the storage of Li ions within the mesochannels of mPTA.
dc.identifier.citationAngewandte Chemie International Edition, 2019; 58(32):10849-10854
dc.identifier.doi10.1002/anie.201901224
dc.identifier.issn1433-7851
dc.identifier.issn1521-3773
dc.identifier.urihttps://hdl.handle.net/11541.2/138005
dc.language.isoen
dc.publisherWiley VCH Verlag GmbH
dc.relation.fundingARC DE170101069
dc.relation.fundingARC DP1501048248
dc.relation.fundingARC DP170104478
dc.relation.fundingUniversity of South Australia
dc.relation.fundingUniversity of Queensland
dc.rightsCopyright 2019 Wiley-VCH Verlag GmbH & Co Access Condition Notes: Accepted manuscript available after 1 July 2020
dc.source.urihttps://doi.org/10.1002/anie.201901224
dc.subjectcrystalline structures
dc.subjectelectrochemistry
dc.subjectphosphotungstic acid
dc.subjectmesoporous materials
dc.subjectsoft templating
dc.titleHighly crystalline mesoporous phosphotungstic acid: a high-performance electrode material for energy-storage applications
dc.typeJournal article
pubs.publication-statusPublished
ror.fileinfo12177297300001831 13177297290001831 Highly Crystalline Mesoporous Phosphotungstic Acid.pdf
ror.mmsid9916298609301831

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