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

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dc.contributor.author Raju, K.
dc.contributor.author Ozoemena, K.I.
dc.date.accessioned 2016-11-25T13:07:06Z
dc.date.available 2016-11-25T13:07:06Z
dc.date.issued 2015-12
dc.identifier.citation Raju, 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.issn 2045-2322
dc.identifier.uri http://hdl.handle.net/10539/21482
dc.description.abstract High-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.sponsorship CSIR (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.language.iso en en_ZA
dc.publisher Nature Publishing Group en_ZA
dc.rights This work is licensed under a Creative Commons Attribution 4.0 International License. en_ZA
dc.subject Electrochemistry en_ZA
dc.subject Materials for energy and catalysis en_ZA
dc.subject Nanowires en_ZA
dc.title Hierarchical one-dimensional ammonium nickel phosphate microrods for high-performance pseudocapacitors en_ZA
dc.type Article en_ZA
dc.journal.volume 5 en_ZA
dc.journal.title Scientific Reports en_ZA
dc.description.librarian SP2016 en_ZA
dc.citation.doi 10.1038/srep17629 en_ZA
dc.description.url http://www.nature.com/articles/srep17629 en_ZA


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