Abstract: An object of the present invention is to provide a carbonaceous material from which an electrochemical device having a high initial electrostatic capacitance, an excellent effect of suppressing gas generation during charging and discharging, and excellent durability can be obtained, and a method for producing the carbonaceous material, an electrode active material for an electrochemical device containing the carbonaceous material, an electrode for an electrochemical device containing the electrode active material, and an electrochemical device. The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g, a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.10 mg/m2, and an electrical conductivity of 10 to 15 S/cm determined by powder resistance measurement at a load of 12 kN.

Abstract: The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g and a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.04 mg/m2.

Abstract: The present invention relates to an additive for an electrochemical element positive electrode comprising an activated carbon, wherein the activated carbon has a specific surface area in accordance with BET method of 1300-2500 m2/g, a pore volume of pores having a diameter of 2 nm or more of 0.35 cm3/g or less, a pore volume of pores having a diameter less than 2 nm of 0.5 cm3/g or more, and an ash content of 0.5% by weight or less.

Abstract: A carbonaceous material may have a high capacitance per volume as well as a high durability, and/or may have a BET specific surface area is 1,500 to 1,900 m2/g, an average pore size is 1.84 to 2.05 nm at a nitrogen relative pressure P/P0 of 0.93 in a nitrogen adsorption isotherm measured at 77.4 K, a ratio of pore volume having a pore size of 3 nm or smaller, determined by the BJH method, is 65 to 90% relative to total pore volume calculated based on a nitrogen adsorption amount at a relative pressure P/P0 of 0.93 in the nitrogen adsorption isotherm, and a ratio of pore volume having a pore size of 1 to 2 nm, determined by the MP method, is 10 to 20% relative to total pore volume calculated based on the nitrogen adsorption amount at a relative pressure P/P0 of 0.93 in the nitrogen adsorption isotherm.

Abstract: The present invention relates to an additive for an electrochemical element positive electrode comprising an activated carbon, wherein the activated carbon has a specific surface area in accordance with BET method of 1300-2500 m2/g, a pore volume of pores having a diameter of 2 nm or more of 0.35 cm3/g or less, a pore volume of pores having a diameter less than 2 nm of 0.5 cm3/g or more, and an ash content of 0.5% by weight or less.

Abstract: The present invention relates to a carbonaceous material having a silicon element content of less than 200 ppm, a powder conductivity of 10.0 to 22.0 S/cm, a total amount of surface functional groups of 0.22 to 0.36 meq/g, and a pore volume of 0.10 to 0.20 cm3/g in terms of pores having a pore size of not less than 4 nm as measured by a BJH method.

Abstract: An object of the present invention is to provide a carbonaceous material from which an electrochemical device having a high initial electrostatic capacitance, an excellent effect of suppressing gas generation during charging and discharging, and excellent durability can be obtained, and a method for producing the carbonaceous material, an electrode active material for an electrochemical device containing the carbonaceous material, an electrode for an electrochemical device containing the electrode active material, and an electrochemical device. The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g, a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.10 mg/m2, and an electrical conductivity of 10 to 15 S/cm determined by powder resistance measurement at a load of 12 kN.

Abstract: The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g and a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.04 mg/m2.

Abstract: A carbonaceous material may have a high capacitance per volume as well as a high durability, and/or may have a BET specific surface area is 1,500 to 1,900 m2/g, an average pore size is 1.84 to 2.05 nm at a nitrogen relative pressure P/P0 of 0.93 in a nitrogen adsorption isotherm measured at 77.4 K, a ratio of pore volume having a pore size of 3 nm or smaller, determined by the BJH method, is 65 to 90% relative to total pore volume calculated based on a nitrogen adsorption amount at a relative pressure P/P0 of 0.93 in the nitrogen adsorption isotherm, and a ratio of pore volume having a pore size of 1 to 2 nm, determined by the MP method, is 10 to 20% relative to total pore volume calculated based on the nitrogen adsorption amount at a relative pressure P/P0 of 0.93 in the nitrogen adsorption isotherm.