The purpose is to provide porous carbon suitable for a positive electrode additive that can improve the input/output characteristics of a non-aqueous electrolyte secondary battery at room temperature and ensure the peel strength of an electrode. The present invention relates to porous carbon having a pore volume of pores with 2 nm or more and 200 nm or less of 0.8 cm.sup.3/g or more as measured by the BJH method, a bulk density of 0.10 g/cm.sup.3 or less, a mode pore diameter of 150 nm or less as measured by the BJH method, and an average primary particle diameter of 1 ?m or more and 100 ?m or less.

The present disclosure relates to a heteroatom doped activated nanoporous carbon material prepared from a template material comprising natural halloysite-kaolin nanoclays, a carbon precursor, a heteroatom dopant precursor and an activating agent, wherein the doped activated nanoporous carbon material exhibits a flake and nanotubular morphology and bears surface heteroatom functionalities.

The present disclosure relates to a heteroatom doped activated nanoporous carbon material prepared from a template material comprising natural halloysite-kaolin nanoclays, a carbon precursor, a heteroatom dopant precursor and an activating agent, wherein the doped activated nanoporous carbon material exhibits a flake and nanotubular morphology and bears surface heteroatom functionalities.

A chemical vapor deposition method for fluorine-containing carbon materials preparation provided. The claimed method comprises treating of carbons with fluorocarbons or derivatives that passes at a moderate high temperature. The fluorine-containing carbon materials show hydrophobicity, high thermal stability and can be used as catalysts support, lithium battery anodes, and hydrophobic materials or as surface precursor. Surface fluorine characterized by intensive signal in the XPS spectrum, found in a range of 685-687 eV. Obtained fluoro-containing functionalities is stable at a temperature about 1000 C. The authors propose to use Fluocar name for materials synthesized using the claimed method.

A porous carbon material composite formed of a porous carbon material and a functional material and equipped with high functionality. The porous carbon material composite is formed of (A) a porous carbon material obtainable from a plant-derived material having a silicon (Si) content of 5 wt % or higher as a raw material; and (B) a functional material adhered on the porous carbon material, and has a specific surface area of 10 m2/g or greater as determined by the nitrogen BET method and a pore volume of 0.1 cm3/g or greater as determined by the BJH method and MP method.

A porous carbon material composite formed of a porous carbon material and a functional material and equipped with high functionality. The porous carbon material composite is formed of (A) a porous carbon material obtainable from a plant-derived material having a silicon (Si) content of 5 wt % or higher as a raw material; and (B) a functional material adhered on the porous carbon material, and has a specific surface area of 10 m2/g or greater as determined by the nitrogen BET method and a pore volume of 0.1 cm3/g or greater as determined by the BJH method and MP method.

A cow hair-based porous biochar for positive electrodes of lithium-sulfur batteries. The cow hair-based porous biochar includes carbon ranging from 85% to 95% by weight of the biochar and oxygen ranging from 5% to 15% by weight of the biochar. The carbon is arranged in a three-dimensional matrix defining a porosity for the biochar, and the porosity ranges from 60% to 80% of the total volume of the biochar. A synthesis process for obtaining said cow hair-based porous biochar, a cow hair-based composite active material for the preparation of positive electrodes for lithium-sulfur batteries, a positive electrode for a lithium-sulfur battery, and a method for preparing said positive electrode are also provided.

A cow hair-based porous biochar for positive electrodes of lithium-sulfur batteries. The cow hair-based porous biochar includes carbon ranging from 85% to 95% by weight of the biochar and oxygen ranging from 5% to 15% by weight of the biochar. The carbon is arranged in a three-dimensional matrix defining a porosity for the biochar, and the porosity ranges from 60% to 80% of the total volume of the biochar. A synthesis process for obtaining said cow hair-based porous biochar, a cow hair-based composite active material for the preparation of positive electrodes for lithium-sulfur batteries, a positive electrode for a lithium-sulfur battery, and a method for preparing said positive electrode are also provided.

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.sup.2/g, a pore volume of pores having a diameter of 2 nm or more of 0.35 cm.sup.3/g or less, a pore volume of pores having a diameter less than 2 nm of 0.5 cm.sup.3/g or more, and an ash content of 0.5% by weight or less.

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.sup.2/g, a pore volume of pores having a diameter of 2 nm or more of 0.35 cm.sup.3/g or less, a pore volume of pores having a diameter less than 2 nm of 0.5 cm.sup.3/g or more, and an ash content of 0.5% by weight or less.