67results about How to "Rapid de-embedding" patented technology

The invention relates to a synthesis and surface modification method of a lithium rich anode material Li1+xM1-xO2 (M is one or more of Ni, Co and Mn, and X is more than or equal to 0 and less than or equal to 1/3) for a lithium ion battery. The method comprises the following steps of: synthesizing a precursor by using a carbonate precipitation method, mixing the precursor and a lithium salt, and calcining for 2 to 20 hours at the temperature of between 800 and 1,100 EG C to obtain a lithium rich material, wherein the prepared lithium rich material has controllable particle size and higher reversible capacity; and dissolving persulfate or sulfate in an amount which is 5 to 80 mass percent of the lithium rich material into deionized water, adding the lithium rich material, stirring for 2 to 100 hours at the temperature of between 25 and 80 DEG C, heating the materials to the temperature of between 100 and 500 DEG C in a muffle furnace, calcining the materials for 2 to 20 hours, fully filtering the obtained materials, and washing off impurities to obtain the surface modified anode material Li1+x-yM1-xO2. The synthesized lithium rich material has controllable particle size; the first charge/discharge efficiency of the lithium rich material and the discharge specific capacity and the cyclical stability under high magnification can be improved; and the method is simple, low in cost, convenient for operation and suitable for industrialized production.

The invention discloses a positive electrode material for a potassium ion battery and a preparation method thereof, and the potassium ion battery. The positive electrode material has a chemical formula of K<x>P[R(CN)<6>], wherein x is no less than 0 and no more than 2, P is a transition metal ion, and R is Fe<2+> or Fe<3+>. The preparation method comprises the following steps: dissolving potassium ferricyanide or potassium ferrocyanide and a transition metal salt to prepare a uniform solution; then carrying out a hydrothermal reaction; separating a precipitate produced in the hydrothermal reaction; and carrying out washing and vacuum drying so as to obtain the positive electrode material. The preparation method in the invention is simple in process, easy to operate, low in cost for required raw materials and suitable for large-scale industrial production. The prepared positive electrode material has an open three-dimensional network frame structure, and great interstitial sites allow potassium ions to shuttle and to be stored, so the potassium ion battery assembled from the positive electrode material has high discharge capacity, long cycle life, and high energy density and power density.

The invention relates to a high-energy-density lithium ion battery and a preparation method thereof. The high-energy-density lithium ion battery comprises a positive pole piece, a negative pole piece and a membrane, wherein an active substance on the positive pole piece is nickel cobalt lithium manganate, namely Li<1+a>Ni<x>Co<y>Mn<z>O2; an active substance on the negative pole piece is a silicon-carbon material. The preparation method of the high-energy-density lithium ion battery comprises the following steps: manufacturing the positive pole piece with the active substance, nickel cobalt lithium manganate, namely Li<1+a>Ni<x>Co<y>Mn<z>O2; manufacturing the negative pole piece with the silicon-carbon material as the active substance; coiling or laminating the positive pole piece, the negative pole piece and the celgard membrane to prepare a power battery core. The lithium ion battery provided by the invention is high in energy density, high in coulombic efficiency and high in cycling stability. The preparation method has the advantages of simple process, low cost and easiness for industrialized production.

The invention discloses a metal zinc negative electrode with a uniform mesoporous structure coating and a preparation method and application thereof, belonging to the technical field of aqueous zinc ion batteries. The metal zinc negative electrode comprises a zinc negative electrode and a clay slurry layer, and is prepared by pre-embedding zinc. The raw material powder of the clay slurry includes1-20wt% of polyvinylidene fluoride and 80-90wt% of clay material. The aqueous zinc ion battery negative electrode coating presented in the invention can play a role of a protective layer, isolate thedirect contact between the zinc negative electrode and the electrolyte to a certain extent, reduce the side reaction between the electrode and the electrolyte and improve the cycle stability. The layered porosity of the material itself can prevent dendrites from being generated and penetrating a diaphragm in the cycle process, alleviate the volume expansion of the negative electrode, reduce the occurrence of short circuit of the battery and improve the safety performance.

The invention discloses a modified high-voltage positive electrode material as well as a preparation method and application thereof. The modified high-voltage positive electrode material comprises a high-voltage positive electrode material core and a conductive polymer shell layer coating the surface of the high-voltage positive electrode material core, the preparation method comprises the following steps: carrying out in-situ reaction by adopting a high-voltage positive electrode material, a conductive polymer monomer, a catalyst and an initiator or carrying out direct coating by adopting thehigh-voltage positive electrode material, a conductive polymer and a coupling agent. The modified high-voltage positive electrode material can gradually react with an electrolyte in a battery througha controllable electrochemical activation process to form a new surface compact coating layer, the surface impedance of the battery can be effectively reduced, the ion transmission performance is improved, the rate capability of the material is improved, and the preparation method is simple to operate, high in controllability, non-toxic, harmless, few in by-product and suitable for industrial production.

The invention relates to a positive electrode material for lithium ion cells and a preparation method thereof. The material provided by the invention is porous vanadic anhydride with an amorphous carbon layer on the surface of vanadic anhydride, wherein the weight friction of vanadic anhydride is 80-99.9% and the weight friction of carbon is 0.1-20%. In comparison with the prior art, the preparation method provided by the invention has advantages of simple technological process, short reaction time, low production cost and the like.

The invention provides a potassium ion battery negative electrode active material, a potassium ion battery negative electrode material, a potassium ion battery negative electrode, a potassium ion battery and an application thereof, belonging to the technical field of potassium ion batteries. The potassium ion battery negative electrode active material provided by the invention comprises a ruthenium pentoxide composite material, wherein the ruthenium pentoxide composite material comprises a ruthenium pentoxide composite material containing a doping ions and/or a coating layer. The ruthenium pentoxide composite material has excellent potassium ion transport channels, can realize rapid insertion and de-intercalation of potassium ions, has stable crystal structure, adopts the reaction mechanism of intercalation and pseudocapacitance dual mechanism, prepares the potassium ion battery with the advantages of long cycle life, high specific capacity and low cost, can solve the problem of priceincrease caused by insufficient lithium resources, avoids the problems of expansion and pulverization of the alloy-type negative electrode of the potassium ion battery, slow dynamics of the intercalated carbon material and the like, and can be widely applied to electric tools, electronic equipment, electric vehicles or energy storage equipment.

The invention provides a positive electrode plate and a lithium ion battery. The positive electrode plate comprises a positive current collector and a positive slurry deposited on the surface of the positive current collector. The positive current collector is a foamed aluminum foil. The positive slurry comprises, in percentage by weight, 92%-98% of positive active substance, 0.05%-2% of conductive agent, 1%-2.5% of PVDF and 0.05%-2% of single-walled carbon nanotube. The lithium ion battery comprises a positive electrode plate and the negative electrode plate. The positive electrode plate comprises a positive current collector and a positive slurry deposited on the surface of the positive current collector. The negative electrode plate comprises a negative current collector and a negative slurry deposited on the surface of the negative current collector. The positive slurry comprises, in percentage by weight, 92%-98% of positive active substance, 0.05%-2% of conductive agent, 1%-2.5% of PVDF and 0.05%-2% of single-walled carbon nanotube. The negative slurry comprises, in percentage by weight, 93%-96% of positive active substance, 0.05%-2% of conductive agent, 1%-3% of LA133.

The invention discloses a zinc ion battery positive electrode active material, a positive electrode material, a zinc ion battery positive electrode, a zinc ion battery and a preparation method and application thereof, and relates to the technical field of zinc ion batteries. The zinc ion battery positive electrode active material comprises niobium oxide or a composite material thereof. According to the invention, the niobium oxide or the composite material of the niobium oxide is applied to the positive electrode active material of the zinc ion battery. The niobium oxide or the niobium composite material has a rapid zinc ion transmission channel, so that the rapid intercalation and deintercalation of zinc ions can be realized. The prepared zinc ion battery has the advantages of long cyclelife, high specific capacity and low cost. The problems of limited lithium resource reserve and high cost of the existing lithium ion battery are solved. The problems of low capacity, poor stability of a positive electrode structure, slow intercalation dynamics and the like of the existing zinc ion battery positive electrode active material are solved.

The invention provides an ultrahigh specific capacity mesoporous Co3O4 nanosheet electrode material and a preparation method thereof. The preparation method comprises the following steps that 1) foam nickel is adopted to act as the three-electrode system of a working electrode, the mixed aqueous solution of Co(NO3)2 and KCl acts as an electrolyte solution, and a Co(OH)2 nanosheet is deposited on the surface of foam nickel through constant current so that a Co(OH)2 nanosheet precursor is acquired; and 2) the Co(OH)2 nanosheet precursor acquired in the step 1) is cleaned and dried, and then high temperature annealing is performed at temperature of 350-450 DEG C so that the mesoporous Co3O4 nanosheet electrode material is acquired. According to the preparation method of the ultrahigh specific capacity mesoporous Co3O4 nanosheet electrode material, the preparation method has the characteristics of being simple in technology, green and environment-friendly and low in cost, and the acquired Co3O4 nanosheet electrode material has relatively high specific capacity.

The invention relates to a composite lithium-rich manganese-based cathode material and a preparation method thereof, belonging to the field of chemical energy storage batteries. The cathode material is a composite material with a core-shell structure; a NaZr2(PO4)3 coating layer with uniform deposition thickness is prepared on the surface of the lithium-rich manganese-based cathode material by a complexing method; and by changing the mass ratio of the NaZr2(PO4)3 to lithium-rich manganese-based cathode material, coating layers different in morphology, structure and arrangement can be obtained. With the NaZr2(PO4)3 coating layer, the relocation diffusion of Li<+> is improved in different degrees, which shows the improvement of electrochemical performance in varying degrees; and moreover, the composite lithium-rich manganese-based cathode material can realize high-rate charge/discharge of a battery so as to enhance the cycling stability of the battery.

The invention relates to the field of lithium ion batteries, in particular to a metal lithium composite negative electrode material and a preparation method thereof. The preparation method is furtherbased on electroplating process and includes: taking a carbon nanotube thin film as an electroplating substrate, and electroplating a metal coating with certain thickness to improve electronic conductivity of the material; distributing metal lithium particles in the hollow inside of a non-lithium metal coating-carbon nanotube compound and/or gaps in the non-lithium metal coating-carbon nanotube compound in a non-lithium metal coating-carbon nanotube composite thin film to obtain the metal lithium composite negative electrode material. The advantages of high strength of carbon nanotubes and high conductivity of hollow structure and the non-lithium metal coating are combined to support stabilizing and quick disembedding of the metal lithium active material so as to improve cycling stabilityof the material.

The invention discloses a sodium ion battery negative electrode material and a preparation method thereof. The preparation method comprises the steps that spiral nanometer carbon fibers are prepared at low temperature through a chemical vapor deposition method, then the spiral nanometer carbon fibers are carbonized and acidified in sequence, finally, a molybdenum source, a sulfur source and the acidified spiral nanometer carbon fibers are mixed, and then the mixture is put into a reaction kettle for hydrothermal reaction, and then is subjected to centrifuging, freeze-drying and annealing to obtain the sodium ion battery negative electrode material. The sodium ion battery negative electrode material prepared by the method has good conductivity and cycling stability.

The invention relates to the field of waste and old lithium battery recovery, and provides a regenerated ternary cathode material and a preparation method thereof, wherein a method for preparing the regenerated the ternary cathode material comprises the following steps of extracting a devitalized ternary cathode material; dissolving the devitalized ternary cathode material by an acetic acid solution to obtain a first mixed solution; mixing the first mixed solution with an oxalic acid solution to obtain a first suspension solution; filtering the first suspension solution to obtain a first precipitate and a second mixed solution; after the second mixed solution and a sodium hydroxide solution are mixed and the pH is regulated to an alkaline state, mixing obtained materials with sodium carbonate to obtain second suspension; filtering the second suspension to obtain a third mixed solution and a second precipitate; mixing the first precipitate, the second precipitate, ethyl alcohol, saccharose and long chain organic substances to obtain a mixture; performing ball milling and ignition on the mixture to obtain precursor powder; performing high-temperature calcination on the precursor powder to obtain a short-rod-shaped regenerated ternary cathode material. The regenerated ternary cathode material has a one-dimensional diffusion passage; in the charging and discharging process, the lithium ion migration path is short; the excellent electric chemical performance is realized.

The invention belongs to the technical field of lithium ion batteries, and relates to a battery negative plate, a preparation method thereof and a lithium ion battery. The negative plate comprises a negative current collector, a first active substance layer positioned on the negative current collector, and a second active substance layer positioned on the first active substance layer, wherein thefirst active material layer comprises a first active material, a first conductive agent and a first binder; the second active substance layer comprises a second active substance, a second conductive agent and a second binder; the capacity of the first active substance for storing lithium ions is greater than that of the second active substance for storing lithium ions; and the ability of the second active material to deintercalate lithium ions is greater than the ability of the first active material to deintercalate lithium ions. In the large-current charging and discharging process, the battery with the battery negative plate can rapidly deintercalate and intercalate lithium ions, the risk of surface lithium precipitation is remarkably reduced, and the power and safety of the battery areimproved.

The invention discloses a negative electrode material, a preparation method thereof and a sodium ion battery containing the negative electrode material. The preparation method comprises the followingsteps that (1) an inorganic salt aqueous solution is prepared, then chitin or chitin derivative powder is added, a cosolvent is slowly added, and the materials are continuously stirred or ultrasonically treated to obtain uniform sol; (2) the sol obtained in step (1) is frozen and subjected to vacuum drying to obtain a fluffy precursor; (3) high-temperature calcination is conducted on the precursorobtained in step (2) in an inert atmosphere, inorganic salt fusion and evaporation characteristics are used in the carbonization process of the chitin or the chitin derivative powder, and the poroushard carbon material is prepared in situ. The negative electrode material is of a cross-linked hole structure, and is large in specific surface and rich in nitrogen element. The high electron conductivity of the material is ensured by rich nitrogen elements, meanwhile, a three-dimensional cross-linked network is beneficial to rapid disembedding of sodium ions in the material, high-capacity and high-rate charging and discharging of the battery are realized, and the cycling stability of the battery is improved.

The invention provides a nano composite material and a preparation method and application thereof. The preparation method comprises the steps that acidified carbon nanotubes serve as a raw material; firstly, polyethyleneimine is used for modification treatment to prepare modified carbon nanotubes; then the modified carbon nanotubes react with epoxidized cellulose, and a carbon nanotube-cellulose compound is generated; and finally, the carbon nanotube-cellulose compound is sequentially subjected to nitrogen doping and phosphorus and copper doping to acquire the composite nano material. The composite nano material can be used as a battery negative electrode material, and is high in electric capacity, excellent in cycle performance and good in electrical property.

The invention discloses a novel surface carbon modified layered lithium-rich ternary positive electrode composite material and a preparation method thereof. The invention uses a template method to prepare the surface carbon modified layered lithium-rich ternary material, and solves the problem of structural stability of the layered lithium-rich ternary material. The synthesized material has a highspecific capacity and good cycle stability as a lithium ion battery positive electrode material.