Porous mesocarbon microbeads with graphitic shells: constructing a high-rate, high-capacity cathode for hybrid supercapacitor View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2013-12

AUTHORS

Yu Lei, Zheng-Hong Huang, Ying Yang, Wanci Shen, Yongping Zheng, Hongyu Sun, Feiyu Kang

ABSTRACT

Li₄Ti₅O₁₂/activated carbon hybrid supercapacitor can combine the advantages of both lithium-ion battery and supercapacitor, which may meet the requirements for developing high-performance hybrid electric vehicles. Here we proposed a novel "core-shell" porous graphitic carbon (PGC) to replace conventional activated carbon for achieving excellent cell performance. In this PGC structure made from mesocarbon microbead (MCMB), the inner core is composed of porous amorphous carbon, while the outer shell is graphitic carbon. The abundant porosity and the high surface area not only offer sufficient reaction sites to store electrical charge physically, but also can accelerate the liquid electrolyte to penetrate the electrode and the ions to reach the reacting sites. Meanwhile, the outer graphitic shells of the porous carbon microbeads contribute to a conductive network which will remarkably facilitate the electron transportation, and thus can be used to construct a high-rate, high-capacity cathode for hybrid supercapacitor, especially at high current densities. More... »

PAGES

2477

References to SciGraph publications

  • 2008-11. Materials for electrochemical capacitors in NATURE MATERIALS
  • 2012-12. Gassing in Li4Ti5O12-based batteries and its remedy in SCIENTIFIC REPORTS
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/srep02477

    DOI

    http://dx.doi.org/10.1038/srep02477

    DIMENSIONS

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    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/23963328


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