High volumetric electrochemical performance of ultra-high density aligned carbon nanotube supercapacitors with controlled nanomorphology

Yue Zhou, Mehdi Ghaffari, Minren Lin, Ethan M. Parsons, Yang Liu, Brian L. Wardle, Q. M. Zhang

    Research output: Contribution to journalArticlepeer-review

    35 Scopus citations

    Abstract

    The superior electrical conductivity and parallel ion pathways formed by aligned carbon nanotubes (A-CNTs) make them attractive for the nanoporous electrodes of supercapacitors. To achieve high volumetric energy and power densities, the low volume density of the as-synthesized A-CNT (<5%) should be densified. In this paper, we demonstrate a mechanical densification method that allows the density of A-CNTs to be tuned precisely over a broad range while preserving the straight ion pathway between A-CNTs. The supercapacitors fabricated from 40% volumetric fraction (Vf) of A-CNTs as the electrodes with the thickness of 0.8 mm exhibit a power density of 25 kW L-1(50 kW kg-1), which is much higher than that of the A-CNTs electrodes with similar thickness fabricated by other methods and that of activated carbon electrodes.

    Original languageEnglish (US)
    Pages (from-to)608-613
    Number of pages6
    JournalElectrochimica Acta
    Volume111
    DOIs
    StatePublished - 2013

    All Science Journal Classification (ASJC) codes

    • Chemical Engineering(all)
    • Electrochemistry

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