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Oxidation treatment of carbon nanotubes: An essential process in nanocomposite with for supercapacitor electrode materials
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View: Figures


Image of FIG. 1.
FIG. 1.

XRD measurements with synchrotron radiation , indicating Ru metal formation on MWNTs. A large peak at around is corresponding to (101) of quartz capillary used in the measurements.

Image of FIG. 2.
FIG. 2.

Absolute electron energy level difference between the Fermi level of MWNT and the standard reduction potential of a pair, and PEE spectra (inner part) showing the work function of two kinds of MWNT. Abscissa showing DOS is presented with logarithmic scale.

Image of FIG. 3.
FIG. 3.

FTIR spectra demonstrating the appearance of surface carboxyl groups via oxidation treatments and their disappearance by bond formation with .

Image of FIG. 4.
FIG. 4.

Schematic diagram of the different formation mechanisms of on P-MWNT and O-MWNT in the preparation process and their actual TEM images (scale ).

Image of FIG. 5.
FIG. 5.

Cyclic voltammograms in electrolyte with a scan rate of . The reference and counterelectrodes were a saturated calomel electrode (SCE) and a Pt wire, respectively. The number in a round bracket in legends means the cycle number in which the voltammogram was obtained.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Oxidation treatment of carbon nanotubes: An essential process in nanocomposite with RuO2 for supercapacitor electrode materials