Heterogeneous manganese oxide-encased carbon nanocomposite fibers for high performance pseudocapacitors

Qiang Li, Karen Lozano, Yinong Lü, Yuanbing Mao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

The integration of transition metal oxide nanocrystals and one-dimensional (1D) conducting carbon structures to generate their hybrids can create unpredictable new physical and chemical properties in comparison with single phase components. Here we report the fabrication of heterogeneous MnO nanocrystal (NC)-encased hierarchical carbon nanocomposite fibers (MCNFs) via a novel and large-scale Forcespinning followed by low temperature carbonization. Manganese nitrate containing polyvinylpyrrolidone (PVP) polymeric fiber was carbonized at relatively low temperature, i.e. 500°C due to oxidant Mn 2+ cations. Different inward and outward ionic diffusion rates of Mn2+ cations concurrently result in congregating MnO NCs near the surface region of the nanocomposites during thermolysis. After anodic and cyclic voltammetric electrochemical oxidations, in situ phase transformation from electrochemically inactive MnO NCs to pseudocapacitive MnOx counterparts occurs, which yields a MnOx NC/carbon hybrid fiber network with MnOx NC-enriched functional surface. These NCs are accessible to aqueous electrolyte ions for Faradic redox reactions. Therefore these unique nanocomposites demonstrate a promising potential as pseudocapacitive electrode materials.

Original languageEnglish
Title of host publicationCeramic Materials for Energy Applications III - A Collection of Papers Presented at the 37th International Conference on Advanced Ceramics and Composites, ICACC 2013
Pages41-55
Number of pages15
Edition9
StatePublished - 2014
EventCeramic Materials for Energy Applications III - 37th International Conference on Advanced Ceramics and Composites, ICACC 2013 - Daytona Beach, FL, United States
Duration: 27 Jan 20131 Feb 2013

Publication series

NameCeramic Engineering and Science Proceedings
Number9
Volume34
ISSN (Print)0196-6219

Conference

ConferenceCeramic Materials for Energy Applications III - 37th International Conference on Advanced Ceramics and Composites, ICACC 2013
Country/TerritoryUnited States
CityDaytona Beach, FL
Period27/01/131/02/13

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