Abstract: An electromagnetic interference suppressing material includes: a base material containing at least one selected from the group consisting of an organic substance and an inorganic substance; and a carbon composite material. The carbon composite material includes at least one selected from the group consisting of a core-shell particle and a core-shell connected body, where the core-shell particle includes an inorganic particle in which a surface of the inorganic particle is coated with a coating layer composed of graphene having an average number of layers of 4 or less, and the core-shell connected body includes a connected body of inorganic particles in which a surface of the connected body of inorganic particles is coated with a coating layer of graphene having an average number of layers of 4 or less, and the electromagnetic interference suppressing material has a volume resistance of 103 ?·cm or more.

Abstract: An electromagnetic interference suppressing material includes: a base material containing at least one selected from the group consisting of an organic substance and an inorganic substance; and a powder carbon material. The powder carbon material includes at least one selected from the group consisting of a first shell-shaped body and a second shell-shaped body, where the first shell-shaped body is a hollow particle having one pore or two or more pores, and the second shell-shaped body has a shape in which hollow particles are connected and has a plurality of pores, and a shell portion of the first shell-shaped body and the second shell-shaped body is made of graphene having an average number of layers of 4 or less.

Abstract: An object is to provide a carbon material that can achieve high electrical conductivity or durability together with flexibility against compression and to provide a power storage device containing the carbon material inside an electrode. Provided are a carbon material having a bulk modulus K that is less than or equal to 2 GPa and an average graphene domain size L that is greater than or equal to 50 nm, a cathode for a power storage device and an anode for a power storage device in which the carbon material is used as a conductive agent, and a power storage device including a cathode and/or an anode including the carbon material as a conductive agent.

Abstract: An object of the present invention is to provide a negative electrode active material for a lithium ion secondary battery, the negative electrode active material particularly having a high capacity and a long lifetime. A negative electrode material for a lithium ion secondary battery, containing: silicon nanoparticles; and silicon nanowires, wherein the silicon nanoparticles and the silicon nanowires are bound to each other. More preferably, the negative electrode active material for a lithium ion secondary battery, wherein a surface of the silicon nanoparticle or the silicon nanowire is covered with a carbon coating layer.

Abstract: The present invention provides composite material in which Si and carbon are combined so as to form an unprecedented structure; method for fabricating the same; and negative electrode material for lithium-ion batteries ensuring high charge-discharge capacity and high cycle performance. By heating an aggregate of Si nanoparticles and using a source gas containing carbon, a carbon layer is formed on each of the Si particles. Walls 12 forming a space 13a containing Si particles 11 and a space 13b not containing Si particles 11 are constructed by this carbon layer.

Abstract: The present invention provides a microporous carbon material capable of expressing functions that supported metal has while maintaining pore functions that the microporous carbon material inherently possesses. The microporous carbon material 5 includes: a three-dimensional long-range ordered structure within a range from 0.7 nm or more to 2 nm or less; and micropores 2a, wherein a transition metal 4 is supported on surfaces of the micropores 2a. The microporous carbon material is obtained by a method including: introducing an organic compound on a surface of and inside the micropores of a porous material containing transition metal, and obtaining a composite of the microporous carbon material containing the transition metal and the porous material by carbonizing the organic compound by a chemical vapor deposition method; and removing the porous material.

Abstract: The present invention provides a microporous carbon material capable of expressing functions that supported metal has while maintaining pore functions that the microporous carbon material inherently possesses. The microporous carbon material 5 includes: a three-dimensional long-range ordered structure within a range from 0.7 nm or more to 2 nm or less; and micropores 2a, wherein a transition metal 4 is supported on surfaces of the micropores 2a. The microporous carbon material is obtained by a method including: introducing an organic compound on a surface of and inside the micropores of a porous material containing transition metal, and obtaining a composite of the microporous carbon material containing the transition metal and the porous material by carbonizing the organic compound by a chemical vapor deposition method; and removing the porous material.