The composite materials of natural graphite (NG) and nano-scaled carbon were obtained by doping with carbon nanotube (CNT) and carbon nanopowder (CNP) respectively.
The physicochemical properties of general natural graphite were modified by gas-phase oxidation using air as oxidant at temperatures of 500℃,550℃ and 600℃.
A new polystyrene-intercalated graphite oxide/polystyrene nano-composite was prepared by emulsion polymerization of styrene in the presence of graphite oxide. Graphite oxide (GO) was synthesized by the oxidization of natural graphite powder with KMnO4 in the concentrated sulfuric acid.
The asymmetric capacitors using nature graphite (G), meso-carbon microbeads (MCMB), meso-carbon fibre (MCF) as the anode and activated carbon as the cathode were assembled. Electrochemical tests show that the charge/discharge performance of these asymmetric systems is correlated with the lithium intercalation behavior of the graphite materials straightway.
Through electrochemical tests, it can be obtained that ES is an outstanding film-forming additive and can not only allow the use of graphite anode in PC-based electrolyte, but also improve the cycling life of lithium-ion cell using low cost nature graphite anode.
A comparative study on the forming process of exfoliated graphite and graphite oxide prepared from both natural graphite and expandable graphite is accomplished with XRD,FTIR and TG techniques.
The surface properties of fully fluorinated samples of natural graphite (FG) and carbon fiber (FCF) were studied by gas chromatography, IR spectroscopy, and static adsorption.
Adsorption of nickel N,N-ethylenebis(salicylideneimine) complex from acetonitrile solution on expanded natural graphite powder at 273-313 K is studied.
Adsorption of a nickel(II) complex with a ligand N,N'-2,3-dimethylbutane-2,3-diylbis(salicylidenimine) on a powdered thermally expanded natural graphite and at the air-solution interface from an acetonitrile solution was studied at 283 and 293 K.
Modification of natural graphite using pitch through dynamical melt-carbonization
Characteristic energy loss measurements are carried out on natural graphite single crystals.
Adsorption of nickel N,N-ethylenebis(salicylideneimine) complex from acetonitrile solution on expanded natural graphite powder at 273-313 K is studied.
The behaviour of Mo wire embedded in natural graphite powder was studied.
Surface characterization of natural graphite powder composite electrodes by atomic force microscopy
Electrochemical Synthesis of Thermally Expandable Graphite Compounds in Nitrate Electrolyte
The application of expandable graphite as a flame retardant and smoke-suppressing additive for ethylene-propylene-diene terpolym
The influence of expandable graphite on the smoke formation and flammability of ethylene-propylene-diene terpolymer (EPDM) is studied in the present work.
Thermogravimetric examinations and nitrous oxide index measurements show that expandable graphite acts as a fire and smoke-suppresant additive predominantly in the condensed phase.
Traces of polymer surface temperature against time show that the expanded carbon layer formed in the combustion of expandable graphite produces a heat insulating effect toward the undecomposed bulk.
Hydtogenated amorphous carbon (a-C: H) films were prepared by. ca-thodic glow discharge deposition onto temperatrue controlled substrates.and annealed at temperature up to 600℃. Raman spectra of these films,in the range 1000～1800 cm~(- 1), were analyzed. Raman spectrum of a-C: Hfilms is a single asymmetric peak. As anneal temperature increases. Ra-man spectrum of a-C: H films appeares to be two peaks. and also observedRaman spectra of diamond and pristine graphite. A study on the compar-isbn of these spectra...
Hydtogenated amorphous carbon (a-C: H) films were prepared by. ca-thodic glow discharge deposition onto temperatrue controlled substrates.and annealed at temperature up to 600℃. Raman spectra of these films,in the range 1000～1800 cm~(- 1), were analyzed. Raman spectrum of a-C: Hfilms is a single asymmetric peak. As anneal temperature increases. Ra-man spectrum of a-C: H films appeares to be two peaks. and also observedRaman spectra of diamond and pristine graphite. A study on the compar-isbn of these spectra with recent model is discussed, The results are consi-stent with a model of amorphous carbon in which there is a network st-ructure of both three-fold and four-fold coordinated atoms.
Carbon-polypropylene(CPP),which is made from the mixture of natural graphite and polypropylene through hot pressing,as an anodic ac- tive matter is intercalated and over-oxidied in thick sulfuric acid ele- ctrolyte with the cyclic voltammetre methode and the galvanostatic meth- ode.In the region of intercalation,the oxidation(intercalation)and the reduction(deintercalation)are basically reversible,but in the region of overoxidation,the reversibility of the reactions become worse and the different between the...
Carbon-polypropylene(CPP),which is made from the mixture of natural graphite and polypropylene through hot pressing,as an anodic ac- tive matter is intercalated and over-oxidied in thick sulfuric acid ele- ctrolyte with the cyclic voltammetre methode and the galvanostatic meth- ode.In the region of intercalation,the oxidation(intercalation)and the reduction(deintercalation)are basically reversible,but in the region of overoxidation,the reversibility of the reactions become worse and the different between the oxido-reduction peak potential coupples also be- comes greater.A graphite oxidate,like C_(2.7)A which has a oxidisability of 0.37,is formed by oxidating of CPP.The Reaction possesses a certain reversibility.
天然石墨
natural graphite
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