摘要:
The invention relates to a method for manufacturing activated carbon from tobacco leaves by simultaneouscarbonization andself-activation in an inert gas environment. The activated carbon produced by this new method has a specific surface area from 600 to 2000 m 2 g -1 , preferably 1700 m 2 g -1 , and has an extensiveamount of ultramicropores and mesopores, wherein the ratio of the micropore volume to the mesopore volume is at minimum of 3:1, up to 10:1, preferably 4:1.The average pore size (L 0 ) is in the range of 0.55-1.3nm, preferably 0.8–1.2nm, with a total pore volume of 0.2 to 1.25cm 3 g -1 . The invention also refers to an electrode comprising the activated carbon having the above properties as well as the electrochemical capacitor with such an electrode.
摘要:
A nitrogen-containing carbon porous material, which has a nitrogen content of 0.5 to 30 mass%, and which has a specific surface area of 200 to 3,000 m 2 /g.
摘要:
A lithium ion capacitor is provided with a positive electrode made of a material capable of reversibly carrying lithium ion and/or anion, a negative electrode made of a material capable of reversibly carrying lithium ion and an electrolytic solution made of a non-protonic organic solvent electrolytic solution of a lithium salt. (a) A negative electrode active material is non-graphitizable carbon that has a ratio of number of hydrogen atoms to number of carbon atoms of zero or more and less than 0.05. (b) Lithium ion is doped in advance to a negative electrode and/or positive electrode so that a negative electrode potential when a cell is discharged to a voltage one half a charging voltage of the cell may be 0.1.5 V or less to a metal lithium potential.
摘要:
An electrode active material comprising a silicon-containing carbon-based composite material obtained by: preparing a cured product of (A) a silicon-free organic compound having a crosslinkable group, and (B) a silicon-containing compound capable of crosslinking the component (A); and baking the cured product in an inert gas or in a vacuum at 300 to 1,500°C; an electrode comprising the electrode active material; and an electricity storage device comprising the electrode. The electrode active material has high reversible capacity and stable charge and discharge cycle characteristics, has little electrical potential loss when lithium is discharged, and furthermore, can be manufactured via a simple manufacturing process. Therefore, an electrode active material that is particularly suitable for an electrode of a lithium secondary battery can be provided, and an electricity storage device having an electrode comprising the electrode active material can also be provided.
摘要:
The present invention provides a raw coke having such a structure that the graphitized product resulting from graphitization of the raw coke at a temperature of 2800°C under an inactive gas atmosphere will have ratios of the crystallite size to the lattice constant of 360 or less in the (002) plane and 1500 or less in the (110) plane, as a raw coke providing active carbon produced by alkali-activating the raw coke, which is reduced in remaining alkali content and can simplify washing operation because washing liquid can easily pass through the activated carbon, or as a raw coke for the production of needle coke.
摘要:
This invention provides a polarizable electrode (12) comprising at least a mixed activated carbon of two types of activated carbons different from each other in specific surface area, characterized in that the specific surface area of the mixed activated carbon is not less than 900 m 2 /g and less than 1900 m 2 /g. When the specific surface area of the mixed activated carbon is less than 1900 m 2 /g, the resistance reduction in the polarizable electrode (12) is rapidly increased.
摘要:
The present invention provides a polarized electrode 12 containing mixed activated carbon composed of at least two activated carbons with different specific surface areas, and the specific surface area of the mixed activated carbon is not less than 900 m 2 /g and less than 1900 m 2 /g. By setting the specific surface area of the mixed activated carbon to less than 1900 m 2 /g, the resistance reduction ratio of the polarized electrode 12 rapidly increases.
摘要:
A carbonaceous material having a pore size distribution, as determined from a nitrogen adsorption isotherm, in which pores with a radius of up to 10 Å account for at most 70% of the total pore volume, and having a specific surface area, as measured by the nitrogen adsorption BET method, of 1-500 m 2 /g is optimized for the penetration of non-aqueous electrolyte solution to the interior thereof and the surface adsorption of ionic molecules so as to form an electrical double layer thereon. Electrical double-layer capacitors assembled using polarizable electrodes made with the carbonaceous material have a high voltage, a high energy density, a high capacitance, a long cycle life, and are amenable to miniaturization.