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1507 results about "Electrochemical energy storage" patented technology

Preparation method of positive material for cobalt nitride/porous carbon plate/carbon cloth self-supported lithium-sulfur battery

The invention discloses a preparation method of positive material for cobalt nitride/porous carbon plate/carbon cloth self-supported lithium-sulfur battery, belongs to the field of electrochemical energy storage of new energy material. The preparation method comprises the following steps: using a metal organic skeleton compound as a precursor, carbon cloth as a carrier, a metal organic skeleton compound vertically and uniformly grow on the flexible carbon cloth, performing treatment such as carbonization and nitridation to obtain cobalt nitride particles embedded nano carbon plate. The porousnano carbon plate is loaded on the fiber surface of the carbon cloth in a vertical growth manner and shows good electrochemical performance as the positive material of the lithium-sulfur battery. Thecompound self-supported lithium-sulfur battery positive material disclosed by the invention has developed pore structure, greatly shortens the diffusion distance of substances such as ions, electronsand electrolyte; the cobalt nitride particles with nano size adsorbs and catalytically converts the polysulfide, so the dissolution and shuttling of the polysulfide are effectively inhabited, the electric conductivity of the material is greatly improved by the carbon cloth and the application prospect is wide.
Owner:DALIAN UNIV OF TECH

Composite material based on nanometer, preparation method of composite material and application in flexible energy storage device

The invention relates to the field of chemical energy storage devices such as super capacitors, batteries and the like, and particularly discloses a composite material based on nanometer, a preparation method of the composite material and application in a flexible energy storage device, which solve the problem that common energy storage devices are difficult to be bent and deform. Nanometer active materials are compounded with flexible fibers, high-energy-storage characteristics of the nanometer active materials and excellent flexibility of flexible fiber materials are integrated, the quality percentage of the nanometer active materials ranges from 0.1% to 40%, the rest components of the composite material are the flexible fibers, the flexible nanometer composite material in a three-dimensional communication network structure is formed, furthermore, the composite material can be used as an electrode active material and a current collector simultaneously so as to be assembled to form the bendable flexible energy storage device, higher specific capacity can be realized under a bending condition and is equivalent to that when the flexible energy storage device is not bent, and the composite material can be expected to be applied to the field of flexible devices in the future.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Preparation method of high-nitrogen-doped graphene nanoparticles and application of high-nitrogen-doped graphene nanoparticles as negative material of lithium ion battery

The invention provides a preparation method of high-nitrogen-doped graphene nanoparticles and application of the high-nitrogen-doped graphene nanoparticles as a negative material of a lithium ion battery. The corresponding method comprises the following steps: slowly dropwise adding a preset quantity of zinc nitrate (Zn(NO3)) methanol solution into a methanol mixed solution which is prepared from a preset amount of 2-methylimidazole (C4H6N2) and a preset amount of polyvinylpyrrolidone (PVP), magnetically stirring and standing for preset time, carrying out centrifugal separation to obtain ZIF-8(a complex formed by zinc and 2-methylimidazole) nanoparticles; and putting the obtained ZIF-8 nanoparticles in a high-temperature furnace and calcining at 600-1,000 DEG C for preset time in the nitrogen atmosphere to obtain the high-nitrogen-doped graphene nanoparticles. The preparation process of the high-nitrogen-doped graphene nanoparticles is simple, and the high-nitrogen-doped graphene nanoparticles are uniform in shape, relatively large in specific surface and high in content of nitrogen, and have great application potentials in aspects of lithium ion batteries, electrochemical energy storage, catalysis and the like. The preparation method of the high-nitrogen-doped graphene nanoparticles is simple and efficient, safe and liable to implement, short in synthesis cycle, is capable of preparing a large quantity of high-nitrogen-doped graphene nanoparticles and is expected to be popularized and industrially applied.
Owner:UNIV OF SCI & TECH OF CHINA
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