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Novel ultrathin nanoflake assembled porous MnO2/carbon strip microspheres for superior pseudocapacitors
journal contribution
posted on 2014-09-02, 00:00 authored by G Wang, Y Liu, G Shao, Lingxue KongLingxue Kong, Weimin GaoA novel hierarchical MnO2/carbon strip (MnO2/C) microsphere is synthesized via galvanostatic charge-discharge of a MnO@C matrix precursor where the carbon is from a low-cost citric acid. This hierarchical structure is composed of manganese oxides nanoflakes and inlaid carbon strips. The ultrathin nanoflakes assemble to form porous microspheres with a rippled surface superstructure. Due to its improved conductivity and remarkable increased phase contact area, this novel structure exhibits an excellent electrochemical performance with a specific capacitance of 485.6 F g -1 at a current density of 0.5 A g-1 and an area capacitance as high as 4.23 F cm-2 at a mass loading of 8.7 mg cm-2. It also shows an excellent cycling stability with 88.9% capacity retention after 1000 cycles. It is speculated that the present low-cost novel hierarchical porous microspheres can serve as a promising electrode material for pseudocapacitors. © 2014 American Chemical Society.
History
Journal
ACS sustainable chemistry and engineeringVolume
2Issue
9Pagination
2191 - 2197Publisher
American Chemical SocietyLocation
Washington, DCPublisher DOI
eISSN
2168-0485Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2014, American Chemical SocietyUsage metrics
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Carbon sourcesGalvanostatic charge-dischargeManganese oxidesPorousPseudocapacitorScience & TechnologyPhysical SciencesTechnologyChemistry, MultidisciplinaryGreen & Sustainable Science & TechnologyEngineering, ChemicalChemistryScience & Technology - Other TopicsEngineeringHIGH-PERFORMANCE SUPERCAPACITORASYMMETRIC SUPERCAPACITORSELECTROCHEMICAL SUPERCAPACITORSHIERARCHICAL MNO2ENERGY-STORAGEELECTRODESNANOCOMPOSITENANOFIBERSNANOPARTICLES
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