Disclosed herein is a composite material that is formed from a polymer, acetylated collagen and graphene, which can be used as a super-capacitor material. Also disclosed herein are methods of making said composite material and its intermediates, as well as a supercapacitor made using said material.

Disclosed herein is a composite material that is formed from a polymer, acetylated collagen and graphene, which can be used as a super-capacitor material. Also disclosed herein are methods of making said composite material and its intermediates, as well as a supercapacitor made using said material.

An object of the present invention is to provide a carbonaceous material used for an electric double layer capacitor having a high electrostatic capacity and capable of maintaining the high electrostatic capacity and energy density over a long period and a method for producing the same. The present invention relates to a carbonaceous material having a specific surface area of 1,200 m.sup.2/g to 1,800 m.sup.2/g according to a BET method, an R-value of 1.2 or more and a G-band half-value width of 70 cm.sup.−1 or more according to a Raman spectrum.

An object of the present invention is to provide a carbonaceous material used for an electric double layer capacitor having a high electrostatic capacity and capable of maintaining the high electrostatic capacity and energy density over a long period and a method for producing the same. The present invention relates to a carbonaceous material having a specific surface area of 1,200 m.sup.2/g to 1,800 m.sup.2/g according to a BET method, an R-value of 1.2 or more and a G-band half-value width of 70 cm.sup.−1 or more according to a Raman spectrum.

Disclosed herein is a composition comprising a shell that is substantially carbon encapsulating a volume that contains a nanoform of silicon and a void space. Disclosed herein too is a method of fabricating a composition comprising combining a nanoform of silicon with a carbon precursor and sintering the combination with a laser.

A porous silicon-containing composite includes: a porous core including a porous silicon composite secondary particle; and a shell on at least one surface of the porous core, the shell including a first graphene, wherein the porous silicon composite secondary particle includes an aggregate of a first primary particle including silicon, a second primary particle including a structure and second graphene on at least one surface of the first primary particle and the second primary particle, and wherein at least one of a shape and a degree of oxidation of the first primary particle and the second primary particle are different. Also an electrode including the porous silicon-containing composite, a lithium battery including the electrode, and a device including the porous silicon-containing composite or the carbon composite.

An MOFs composite electrode material for supercapacitors includes: a Ni-BSC matrix, and a PEDOT coating layer coated on the Ni-BTC matrix, wherein a molar ratio of EDOT to Ni-BTC is 1:(1-4) based on a molar amount of EDOT monomer. A method for preparing the MOFs composite electrode material includes steps of: using nickel nitrate hexahydrate and benzenetricarboxylic acid as raw materials to synthesize Ni-BTC by a hydrothermal method; and using a liquid phase method to grow PEDOT on a surface of the Ni-BTC. An MOFs composite electrode slurry and a working electrode for the supercapacitors including the above MOFs composite electrode material or a MOFs composite electrode material prepared by the above method are also provided. The MOFs composite electrode material provided by the present invention combines advantages of Ni-BTC and PEDOT.

A carbon-polymer complex is provided and includes a porous carbon material and a binder, wherein the porous carbon material includes a material obtained from carbonization of a raw material including rice husk, the raw material having a silicon content of at least 5 wt %, the raw material is heat treated before carbonization, and the raw material is treated by an alkali treatment after carbonization to reduce the silicon content, the porous carbon material having a specific surface area of at least 10 m.sup.2/g as measured by the nitrogen BET method, a pore volume of at least 0.1 cm.sup.3/g as measured by the BJH method and MP method, and an R value of 1.5 or greater, wherein the porous carbon material includes mesopores having pore sizes from 2 nm to 50 nm and obtained from the alkali treatment of the raw material after carbonization, the porous carbon material further includes macropores and micropores.

A carbon-polymer complex is provided and includes a porous carbon material and a binder, wherein the porous carbon material includes a material obtained from carbonization of a raw material including rice husk, the raw material having a silicon content of at least 5 wt %, the raw material is heat treated before carbonization, and the raw material is treated by an alkali treatment after carbonization to reduce the silicon content, the porous carbon material having a specific surface area of at least 10 m.sup.2/g as measured by the nitrogen BET method, a pore volume of at least 0.1 cm.sup.3/g as measured by the BJH method and MP method, and an R value of 1.5 or greater, wherein the porous carbon material includes mesopores having pore sizes from 2 nm to 50 nm and obtained from the alkali treatment of the raw material after carbonization, the porous carbon material further includes macropores and micropores.

The present invention relates to the field of electrode material of a low temperature resistant supercapacitor, and in particular to a nickel foam-supported defective tricobalt tetroxide nanomaterial, a low temperature resistant supercapacitor and a preparation method thereof. The method includes the following steps: dissolving cobalt acetate in an ethylene glycol solution and stirring uniformly to obtain a pink transparent solution; adding hexadecyl trimethyl ammonium bromide to the pink transparent solution, and stirring until the hexadecyl trimethyl ammonium bromide dissolves to obtain a mixed solution; putting the mixed solution into a teflon-lined reactor, adding pretreated nickel foam for hydrothermal reaction, taking out the nickel foam after the reaction is completed, and ultrasonic cleaning the nickel foam repeatedly before drying; and heat-treating the nickel foam obtained after drying. The defective tricobalt tetroxide (D-Co.sub.3O.sub.4) grown on the nickel foam prepared by the present invention still has a high specific capacity at a low temperature, and the assembled supercapacitor can withstand low temperature, and thus has great application prospects.