Abstract:
The present invention relates to a method for separating semi-conducting and metallic single-walled carbon nanotubes from each other and, if present, from other carbonaceous material, or for separating semi-conducting single-walled carbon nanotubes or metallic single-walled carbon nanotubes from other carbonaceous material via density separation using a solution of a polytungstate; to semi-conducting single-walled carbon nanotubes obtainable by this method; and to the use of these semi-conducting single-walled carbon nanotubes; as well as to metallic single-walled carbon nanotubes obtainable by this method; and to their use. The invention further relates to the use of a polytungstate, in particular sodium polytungstate, for separating semi-conducting single-walled carbon nanotubes from metallic single-walled carbon nanotubes, or for separating semi-conducting single-walled carbon nanotubes from undesired carbonaceous material, in particular from metallic single-walled carbon nanotubes, or for separating metallic single-walled carbon nanotubes from undesired carbonaceous material, in particular from semi-conducting single-walled carbon nanotubes. The invention also relates to specific polyarylethers containing phosphate groups and their use as surface-active compounds.
Abstract:
The present invention relates to an aerogel based on doped graphene, a method for producing said aerogel and the use of said aerogel, for example, as an electrode or a catalyst. Furthermore, the present invention relates to electrodes, all solid-state supercapacitors (ASSS) or catalysts based on said aerogel.The present invention also relates to doped graphene, which can be obtained as an intermediate in the production of the aerogel based on doped graphene using graphene oxide as starting material.
Abstract:
Star-shaped ceramic body, wherein the cross-section of the body has six lobes, the ratio of the maximum radius r2 in the star to radius r1 of a circle connecting the intersections of the lobes being in the range from 1.0 to 3.61, preferably from 2.17 to 3.61, the ratio of the area F1 inside this circle to the summed area F2 of the lobes outside this circle being in the range of from 0.54 to 0.90, the ratio of the distance x2 between the two intersections I of one lobe with neighboring lobes and the radius r1 of the circle being in the range of from 0.67 to 1.11. The ceramic body is used as catalyst-support.
Abstract:
The present invention relates to a process for modifying carbon particles, such as graphites, graphene nanoplatelets, carbon black and other carbons, and to modified carbon particles obtainable by such a process. The process for modifying carbon particles is performed within an apparatus which comprises a sample holder located below a reactive zone and comprises the following steps: a) provision of carbon particles on the sample holder of apparatus, b) fluidizing the carbon particles in apparatus with a gaseous stream into the reactive zone, c) keeping the carbon particles with the gaseous stream in the reactive zone for at least 1 sec and feeding energy of at least 2.4 kj into the reactive zone, and d) modification of the carbon particles in the reactive zone to obtain modified carbon particles. It is preferred that the carbon particles are modified by a fluidized bed plasma process.
Abstract:
The present invention relates to a process for producing an electrode containing silicon particles which are coated with carbon (SP2). The respective process is carried out under plasma conditions in combination with a fluidized bed process since silicon particles (SP1) to be coated with carbon are fluidized into the reactive zone of an apparatus (A), employing a gaseous stream (G) containing at least one carbon- containing gas. The coating of the silicon particles (SP1) in the reactive zone (RZ) of apparatus (A) is preferably carried out via a chemical vapor deposition (CVD) process. The silicon particles coated with carbon (SP2) as obtained in process step d) of the present invention are further processed in order to obtain an electrode containing such silicon particles coated with carbon (SP2). The present invention further relates to such an electrode as well as to a battery containing such an electrode. The present invention also relates to the use of such an electrode containing silicon particles coated with carbon (SP2) within such a battery which preferably is a lithium-ion-battery.
Abstract:
The present invention relates to a process for modifying particles. The object is achieved by a process for modifying particles (P1) within an apparatus (Al) which comprises at least two inlets for gaseous streams (Gl) and (G2), a gas inlet zone (IZ), a reactive zone (RZ) located below the gas inlet zone (IZ), a sample holder (SH) located below the reactive zone (RZ) and an outlet (01) located at the bottom of (Al), wherein the process comprises feeding at least one pulse of a gaseous stream (G2), comprising at least one inert gas and/or reactive gas, to carry particles (P1) into the reactive zone (RZ). This pulse of a gaseous stream (G2) is fed into apparatus (Al) at a position below the sample holder (SH).
Abstract:
The present invention relates to the use of an amine precursor of formula I (X 1 -R 1 ) n -NH (3-n) (I) or its ammonium salts for depositing a graphene film having a nitrogen content of from 0 to 65% by weight on a substrate S1 by chemical vapor deposition (CVD), wherein R 1 is selected from (a) C 1 to C 10 alkanediyl, which may all optionally be interrupted by at least one of O, NH and NR 2 , (b) alkenediyl, which may all optionally be interrupted by at least one of O, NH and NR 2 , (c) alkynediyl, which may all optionally be interrupted by at least one of O, NH and NR 2 , (d) C 6 to C 20 aromatic divalent moiety, and (e) CO and CH 2 CO, X 1 is selected from H, OH, OR 2 , NH 2 , NHR 2 , or NR 2 2 , wherein two groups X 1 may together form a bivalent group X 2 being selected from a chemical bond, O, NH, or NR 2 , R 2 is selected from C 1 to C 10 alkyl and a C 6 to C 20 aromatic moiety which may optionally be substituted by one or more substituents X 1 , n is 1, 2, or 3.
Abstract:
An oligophenylene monomer of general formula (I) wherein R 1 and R 2 are independently of each other H, halogene, -OH, -NH 2 , -CN, -NO 2 or a linear or branched, saturated or unsaturated C 1 -C 40 hydrocarbon residue, which can be substituted 1-to 5-fold with halogene (F, Cl, Br, I), -OH, -NH 2 , -CN and/or -NO 2 , and wherein one or more CH 2 -groups can be replaced by -O-or -S-, or an optionally substituted aryl, alkylaryl or alkoxyaryl residue; and m represents 0, 1 or 2.