Kuraray Co., Ltd.

Hiroyuki Nishinami

Shushi Nishimura

Yumika Nishita

Kengo Tachikawa

Yoshihisa Inui

Mao Takayama

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

Carbonaceous material, method for producing same, electrode active material for electrochemical device, electrode for electrochemical device, and electrochemical device

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 m/g, a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.10 mg/m, and an electrical conductivity of 10 to 15 S/cm determined by powder resistance measurement at a load of 12 kN.

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 m/g, a pore volume of pores having a diameter of 2 nm or more of 0.35 cm/g or less, a pore volume of pores having a diameter less than 2 nm of 0.5 cm/g or more, and an ash content of 0.5% by weight or less.

Additive for electrochemical element positive electrode, composition for electrochemical element positive electrode including said additive, and electrochemical element

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 m/g, an average pore size is 1.84 to 2.05 nm at a nitrogen relative pressure P/Pof 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/Pof 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/Pof 0.93 in the nitrogen adsorption isotherm.

Carbonaceous material and method for producing same, electrode active material for electrochemical devices, electrode for electrochemical devices, and electrochemical device

Growing community of inventors

Bizen, Japan

Hiroyuki Nishinami