Hybrid carbon nanofiber (Cnf) products (e.g., mats, yarns, webs, etc.) and methods of fabricating the same are provided. The hybrid Cnf products are flexible and lightweight and have high thermal conductivity. An electrospinning process can be used to fabricate the hybrid Cnf products and can include preparation of an electrospinning solution, electrospinning, and carbonization (e.g., under a vacuum condition).

The present application provides polybenzimidazole carbon fiber that does not require infusibilization treatment and method for producing same.

The present application provides polybenzimidazole carbon fiber that does not require infusibilization treatment and method for producing same.

The object of the present invention is to provide a conductive porous material that has a large specific surface area, that is not easily damaged by pressure, and that can be applied to a variety of applications; a polymer electrolyte fuel cell, and a method of manufacturing a conductive porous material. The conductive porous material is one which is an aggregate of fibrous substances comprising first conductive materials, and second conductive materials that connect between the first conductive materials, and its specific surface area is 100 m.sup.2/g or more, and its thickness retention rate after pressing at 2 MPa is 60% or more. Such a conductive porous material can be manufactured by spinning a spinning solution containing a first conductive material and a carbonizable organic material to form a precursor fiber porous material in which precursor fibers are aggregated, and carbonizing the carbonizable organic material to convert it into a second conductive material.

The object of the present invention is to provide a conductive porous material that has a large specific surface area, that is not easily damaged by pressure, and that can be applied to a variety of applications; a polymer electrolyte fuel cell, and a method of manufacturing a conductive porous material. The conductive porous material is one which is an aggregate of fibrous substances comprising first conductive materials, and second conductive materials that connect between the first conductive materials, and its specific surface area is 100 m.sup.2/g or more, and its thickness retention rate after pressing at 2 MPa is 60% or more. Such a conductive porous material can be manufactured by spinning a spinning solution containing a first conductive material and a carbonizable organic material to form a precursor fiber porous material in which precursor fibers are aggregated, and carbonizing the carbonizable organic material to convert it into a second conductive material.

A cured epoxy resin material is depolymerized by using a composition including a compound represented by the chemical formula of XO.sub.mY.sub.n (wherein X is hydrogen, alkali metal or alkaline earth metal, Y is halogen, m is a number satisfying 1m8 and n is a number satisfying 1n6), and a reaction solvent, wherein X is capable of being dissociated from XO.sub.mY.sub.n and Y radical is capable of being produced from XO.sub.mY.sub.n in the reaction solvent. It is possible to carry out depolymerization of a cured epoxy resin material, for example, at 200 C., specifically 100 C. or lower, and to reduce a processing cost and an energy requirement. It is also possible to substitute for a reaction system using an organic solvent as main solvent, so that the contamination problems caused by the organic solvent functioning as separate contamination source may be solved and environmental contamination or pollution may be minimized.

A cured epoxy resin material is depolymerized by using a composition including a compound represented by the chemical formula of XO.sub.mY.sub.n (wherein X is hydrogen, alkali metal or alkaline earth metal, Y is halogen, m is a number satisfying 1m8 and n is a number satisfying 1n6), and a reaction solvent, wherein X is capable of being dissociated from XO.sub.mY.sub.n and Y radical is capable of being produced from XO.sub.mY.sub.n in the reaction solvent. It is possible to carry out depolymerization of a cured epoxy resin material, for example, at 200 C., specifically 100 C. or lower, and to reduce a processing cost and an energy requirement. It is also possible to substitute for a reaction system using an organic solvent as main solvent, so that the contamination problems caused by the organic solvent functioning as separate contamination source may be solved and environmental contamination or pollution may be minimized.

Laser fabricated graphene fiber which can be prepared from a fluorinated polyimide fiber is disclosed. The graphene fiber exhibits an ultrahigh specific surface area, facilitating excellent electrochemical properties, useful for example in tranducers, capacitors, and micro-supercapacitors.

Laser fabricated graphene fiber which can be prepared from a fluorinated polyimide fiber is disclosed. The graphene fiber exhibits an ultrahigh specific surface area, facilitating excellent electrochemical properties, useful for example in tranducers, capacitors, and micro-supercapacitors.

Hybrid carbon nanofiber (Cnf) products (e.g., mats, yarns, webs, etc.) and methods of fabricating the same are provided. The hybrid Cnf products are flexible and lightweight and have high thermal conductivity. An electrospinning process can be used to fabricate the hybrid Cnf products and can include preparation of an electrospinning solution, electrospinning, and carbonization (e.g., under a vacuum condition).