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Binder-free polymer encapsulated nano sulfur/super-aligned CNT (PVP@S-SACNT) composite electrode is developed via a solution-based method. In the composite structure, PVP not only facilitates better dispersion of SACNT bundles into a 3D continuous network, but also encapsulates the sulfur nanoparticles onto the SACNT network to ensure their tight electrical connection and prevent polysulfide dissolution...
Activated carbons (ACs) were prepared by CO 2 activation using depleted fullerene soot as precursor. The structure of the ACs was investigated by TEM, XRD, and nitrogen adsorption. Their electrochemical properties in electrochemical capacitors were tested by cyclic voltammetry (CV) and galvanostatic charge/discharge methods in a three-electrode cell. Activation temperature and time were proved...
P/N co-doped porous carbons have been synthesized by a simple method through direct carbonization of phosphoric acid doped polyaniline. The textural property and the surface chemistry have been investigated by nitrogen sorption and X-ray photoelectron spectra. P/N co-doped carbons exhibit typical microporous characters with a low surface area and a narrow pore size distribution. Interestingly, the...
Graphene oxide (GO) is reduced and functionalized with primary amine by a one-pot solvothermal process using ethylene glycol as solvent and ammonia water as nitrogen precursor at 180°C for 10h. The reaction is featured by nucleophilic substitution of –COOH and C–O–C groups by the ammonia radicals. The presence of primary amine in graphene is identified by Fourier transform infrared spectroscopy, X-ray...
We present the electronic structure evolution from graphite oxide to thermally reduced graphite oxide. Most functional groups were removed by thermal reduction as indicated by high resolution X-ray photoelectron spectroscopy, and the electrical conductivity increased 6 orders compare with the precursor graphite oxide. X-ray absorption spectroscopy reveals that the thermally reduced graphite oxide...
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