31results about How to "Good potential for large-scale application" patented technology

The invention discloses a preparation method for a high-performance three-dimensional carbon nanotube composite negative electrode material. The preparation method comprises: by taking a carboxylated carbon nanotube as a three-dimensional network framework and taking a high-capacity material subjected to layer by layer self-assembly and modification as an active substance, uniformly mixing the carbon nanotube with the active substance under the action of electrostatic attraction; and then performing in-situ coating by taking a mixed element-containing N or S-doped carbon source as a three-dimensional coating layer, and performing high-temperature treatment to obtain the high-performance three-dimensional carbon nanotube composite negative electrode material. The invention furthermore discloses the high-performance three-dimensional carbon nanotube composite negative electrode material and an application thereof. According to the preparation method, the cycle performance of the active substance is remarkably improved, and the capacity of the composite material can be controllably adjusted by controlling a ratio of the carbon nanotube to the active substance. In addition, a solvent used in the method is water, so that the method is environmentally-friendly, good in repeatability and low in cost, and has relatively high potential of large-scale application and good industrialized prospects.

The invention discloses a preparation method of a high-performance porous-hollow composite anode material. An SiO<2> layer is introduced into the surface of a high-capacity nano anode material as a sacrificial layer; a uniform carbon layer is introduced through in situ polymerization of phenolic resin; a high-molecular polymer and a soft template are subjected to cross-linking polymerization on the surface; and the high-performance porous-hollow composite anode material is prepared through high-temperature carbonization and template removal methods. The invention further discloses the high-performance porous-hollow composite anode material and an application thereof. According to the characteristics of a lithium battery anode material in charge and discharge cycles, the uniform carbon layer coats the outside of an intermediate layer of an active material, and a uniform mesoporous structure is designed in the middle of the outer carbon layer, so that the electrochemical properties of the electrode material are effectively improved. The high-performance porous-hollow composite anode material is cheap in preparing raw materials, simple in operation process and high in yield; the charge and discharge properties of the material are excellent; and industrial production is facilitated.

The invention discloses a cobalt-doped molybdenum sulfide-graphene-carbon composite material, and a preparation method and application thereof. The method comprises proportionally adding cobalt salt,sodium molybdate, a graphene oxide aqueous solution and thiourea into an aqueous solution of sugar; uniformly ultrasonically mixing the mixture; transferring the mixed solution to a hydrothermal reaction kettle for a hydrothermal reaction at a fixed temperature; and obtaining the cobalt-doped molybdenum sulfide-graphene-carbon composite material by washing, drying and sintering. The invention alsodiscloses the composite material and the application thereof. The method, based on the characteristic of the molybdenum sulfide used as a sodium battery negative electrode material, uses the grapheneand carbon having excellent electrical conductivity as a composite medium, utilizes cobalt doping to greatly improve electronic conductivity and sodium storage capacity of the composite material, andprepares the molybdenum sulfide-based composite electrode material having a high specific capacity and a long cycle life in one step. The material is cheap in raw materials, simple in operation process, high in yield, excellent in charge and discharge performance, convenient for industrial production, and easy to promote.

The invention discloses a hollow titanium oxide composite material, and a preparation method and application thereof in a lithium ion battery. The surface of an active substance is coated with a phenolic resin layer serving as a sacrifice template and then coated with a porous titanium oxide material, and the active substance coated hollow titanium oxide composite material containing rich oxygen vacancies is obtained by template removing and CaH2 treatment. The hollow titanium oxide composite material prepared according to the method can be used as a negative electrode material of the lithium ion battery. The hollow titanium oxide composite material, the preparation method and the application thereof, disclosed by the invention, have the advantages of simplicity in process step, short reaction time, high repeatability, high yield and low cost, and have the favorable large-scale application potential; with a hollow structure of the hollow titanium oxide composite material and the existing of a titanium oxide coating layer containing the rich oxygen vacancies, the electrochemical performance of the active substance can be obviously improved; and when used for preparing a lithium ion electrode, the hollow titanium oxide composite material has favorable cycle stability and excellent charging-discharging performance.

The invention discloses a preparation method and application of a double-hetero-element-doped porous carbon nanorod negative electrode material. The method comprises adding SiO2 gel and a phytic acidaqueous solution to an aqueous solution of ammonium persulfate; fully dispersing the SiO2 gel and the phytic acid aqueous solution; under an ice bath condition, rapidly mixing and stilly placing an aqueous solution of conductive polymer monomer aniline; fully drying the obtained mixture by centrifugation and washing; subjecting the mixture to a high-temperature carbonization treatment; and removing the SiO2 by an aqueous solution of hydrofluoric acid to obtain the double-hetero-element-doped porous carbon nanorod negative electrode material. According to the characteristics of the negative electrode material of a lithium battery and a sodium battery in the charge and discharge cycle, the method, by introducing hetero atoms (N, P) into the carbon material for double doping and designing a pore structure having a uniform distribution and a proper number in the carbon, increases the lithium/sodium specific capacity and improves the electrochemical performance of the electrode material. The method is low in preparation material cost, simple in operation process, high in yield, and suitable for industrial production.

The invention relates to a manufacturing method for processing a transparent supercapacitor based on femtosecond laser, and belongs to the field of nano quantum dot novel energy storage electronic devices. According to the invention, femtosecond laser with specific pulse delay is used for focusing and processing an MXene film covered with a layer of transparent gel electrolyte, and a plasma eruption effect is used for pre-depositing generated MXene quantum dots on the transparent gel electrolyte, so that a complete patterned planar or sandwich transparent supercapacitor is prepared. The prepared electrode material is novel, the preparation technology is ingenious, the complete transparent supercapacitor can be processed in situ through a one-step method, a current collector and an additional electrolyte are not needed, and meanwhile the prepared transparent supercapacitor has extremely high transparency and energy storage capacity and is good in stability and long in cycle life.

The invention discloses a preparing method and application of a tungsten based nanoflower material. Cu, W metal blocks and rare-earth salts are subjected to sufficient ball milling mixing, through thevariable current laser ion beam gas phase method, rare earth doping 50 nm-1 micrometer Cu-W alloy nanospheres are prepared, through control over the liquid phase oxidization temperature and time, metal copper is removed, rare earth doping W-W2O3 composite structure is obtained, and finally, through burning, rare earth doped tungsten-based nanoflower materials with flaky density controllability and rich oxygen vacancy are prepared. The application of the tungsten based nanoflower material to preparing of a photocatalyst or gas sensor or battery cathode material is provided, and the prepared rare earth doped tungsten-based nanoflower materials containing rich oxygen vacancy can be applied to high-performance lithium-ion battery cathode materials, sensor materials or photocatalytic material.Compared with the prior art, the process is simple in step, the reaction time is short, the repeating is good, the yield is high, the cost is low, and the large-scale application potentiality is achieved.

The invention discloses a high-performance Sb-based sodium ion battery negative electrode material, which is a NaSb (OH) 6-NaSbS2 porous composite sphere and is realized through urea regulation and control under a hydrothermal reaction. The diameter is 50-100nm, and the specific surface area is relatively high and is 150-350m < 2 >/g; the invention also discloses a preparation method of the high-performance Sb-based sodium ion battery negative electrode material and application of the high-performance Sb-based sodium ion battery negative electrode material in preparation of a sodium battery electrode. The NaSb (OH) 6-NaSbS2 porous composite spheres with rich and uniform pore structures are prepared through a one-pot method according to the characteristics of the sodium battery negative electrode material in charge-discharge circulation, and the internal pore structures can greatly relieve the volume effect caused by sodium intercalation and deintercalation in the charge-discharge process, so that the sodium storage performance of the material is greatly improved.