Hierarchical one-dimensional ammonium nickel phosphate microrods for high-performance pseudocapacitors

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dc.citation.doi10.1038/srep17629en_ZA
dc.contributor.authorRaju, K.
dc.contributor.authorOzoemena, K.I.
dc.date.accessioned2016-11-25T13:07:06Z
dc.date.available2016-11-25T13:07:06Z
dc.date.issued2015-12
dc.description.abstractHigh-performance electrochemical capacitors will drive the next-generation portable, flexible and wearable electronics. Unlike the conventional all-carbon supercapacitors (electric double layer capacitors, EDLC) with high power but poor energy density, pseudocapacitors capitalize the high energy density inherent to reversible redox reactions and provide a facile means to enhancing the energy ratings of supercapacitors. The high length-to-diameter ratio and anisotropic character of 1-D architecture makes them suitable for use in energy storage. For the first time, we report 1-D microrod structures (∼ 36 nm width) of ammonium nickel phosphate hydrate (ANP mr) as a pseudocapacitor with high energy rating and power handling. To confirm the data, the ANP mr -based pseudocapacitor was subjected to various configurations (i.e., half-cell, symmetric, asymmetric, and flexible all-solid-state) and in each case it gave excellent values compared to any accessible literature to date. We clearly demonstrate that a flexible all-solid-state ANP mr -based pseudocapacitor achieved high areal capacitance of 66 mF cm ∼'2 with extra-ordinary energy (21.2 mWh cm ∼'2) and power (12.7 mW cm ∼'2) densities. This work opens doors for a facile, robust and scalable preparation strategy for low-cost, earth-abundant electrode materials for high-performance pseudocapacitors.en_ZA
dc.description.librarianSP2016en_ZA
dc.description.sponsorshipCSIR (South Africa), the South Africa’s Department of Science and Technology (DST) and National Research Foundation (NRF) under the “Nanotechnology Flagship Programme” (supercapacitors and fuel cell project, Grant no. 69849)en_ZA
dc.description.urlhttp://www.nature.com/articles/srep17629en_ZA
dc.identifier.citationRaju, K. and Ozoemena, K.I. 2015. Hierarchical one-dimensional ammonium nickel phosphate microrods for high-performance pseudocapacitors 5, Article number 17629.en_ZA
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/10539/21482
dc.journal.titleScientific Reportsen_ZA
dc.journal.volume5en_ZA
dc.language.isoenen_ZA
dc.publisherNature Publishing Groupen_ZA
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License.en_ZA
dc.subjectElectrochemistryen_ZA
dc.subjectMaterials for energy and catalysisen_ZA
dc.subjectNanowiresen_ZA
dc.titleHierarchical one-dimensional ammonium nickel phosphate microrods for high-performance pseudocapacitorsen_ZA
dc.typeArticleen_ZA
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