215results about How to "Increase conduction rate" patented technology

The invention belongs to the technical field of lithium ion batteries, and concretely discloses a high-safety lithium ion battery cathode material and its preparation method. The preparation method of the high-safety lithium ion battery cathode material comprises the following steps: reacting an Al(OH)3 sol with NaOH and LiOH at 40-90DEG C to prepare LiAlO2, mixing graphite with the LiAlO2, adjusting the pH value, heating to 500-800DEG C to remove organic compounds and water, and grinding to obtain graphite/LiAlO2 composite powder; and putting the graphite/LiAlO2 composite powder under an iron catalyst in a quartz tube to prepare an LiAlO2/carbon nanotube composite material, and ball-milling to obtain the high-safety lithium ion battery cathode material. The high-safety lithium ion battery cathode material provided by the invention has an excellent safety performance, and is especially suitable for large capacity and high rate lithium ion batteries.

The invention relates to a preparation method of a lithium ion battery negative pole material capable of improving the safety performance. The method comprises the following steps of: (1) slurry configuration, (2) coating, and (3) roasting and drying. According to the invention, as a negative pole tab is coated with a lithium metaaluminate film, which not only has a good electronic insulation effect, but also can effectively obstruct battery short circuit after a battery diaphragm PP (Polypropylene) or PE (polyethylene) is punctured, and at the same time the lithium metaaluminate has good ionic conductivity, thus increasing the transmission velocity of the lithium ion battery, and reducing the probability that dendritic crystal generated by lithium separation of the lithium ion battery pierces the diaphragm. The composite negative pole tab prepared by the method plays a very important role in improving high-capacity lithium ion batteries.

The invention discloses a chalcogenide semi-solid lithium battery and a preparing method thereof. The battery is formed by stacking a semi-solid chalcogenide positive electrode, a semi-solid electrolyte and a lithium wafer negative electrode. The semi-solid chalcogenide positive electrode is prepared through the process that firstly, a lithium-salt-containing polymer, a chalcogenide material and a carbon conductive agent are mixed into semi-solid, and then aluminum foil or a nickel net serves as a current collector. The semi-solid electrolyte is prepared by mixing porous inorganic oxide and a lithium-salt-containing polymer, wherein the lithium-salt-containing polymer is prepared by mixing a flow-state polymer and lithium salt. According to the composite type semi-solid electrolyte and the semi-solid chalcogenide positive electrode formed by compounding the lithium-salt-containing polymer and the chalcogenide material, the advantages that inorganic materials are high in mechanical strength and good in stability and the polymer materials are good in flexibility and interface contact, high in ionic conductivity and the like are combined, the ionic conductivity of the electrolyte and the energy storage stability of the chalcogenide positive electrode are improved, the first-time specific discharge capacity is 375 mAh/g, a discharging platform exceeds 2V, an energy storage mechanism is novel, and an energy storage power source with large potential is obtained.

The invention discloses an application of a zinc-based ternary layered composite oxide to a zinc-nickel battery electrode material. The zinc-based ternary layered composite oxide is obtained by calcining carbonate type ternary zinc-based hydrotalcite; the ternary zinc-based hydrotalcite is prepared from zinc nitrate and two selected from divalent metal oxides and trivalent metal nitrates without the zinc nitrate. The zinc-based ternary layered composite oxide is used as an active substance so that the deformation of a zinc cathode is weakened, the dissolution of the active substance of the zinc cathode is inhibited, the reversibility of a zinc-nickel battery electrode is improved and the service life of the zinc-nickel battery electrode is prolonged.

The invention relates to the field of detection, in particular to a nano-particle enhancement detection device based on non-modified monolayer graphene being used as a working electrode and the application thereof, provides the application of the non-modified monolayer graphene in the field of nano-particle enhancement detection, and further provides the nano-particle enhancement detection device, a nano-particle enhancement detection method and a relevant kit. According to the nano-particle enhancement detection method, the non-modified graphene is used as the working electrode, and therefore the electronic transmission rate is improved; modified nanogold and magnetic beads are used for amplifying current signals, and detection sensitivity is improved.

The invention relates to a preparation method and application of an electrochemical sensor for detecting a blood concentration level of an insulin sensitivity reduction early diagnosis biomarker, namely galectin-3 (Gal-3), causing type II diabetes, and belongs to the technical field of electrochemical detection. The preparation method is characterized by comprising the following steps: respectively synthesizing an N-GNRs-Fe-MOFs@AuPNs sensor substrate modified nano composite material and an AuPt-MB nano composite signal material, enabling a detection antibody capable of being in specific binding to the Gal-3 to be mixed with the AuPt-MB composite material so as to prepare a biological signal probe; conjugating a Gal-3 specific capture antibody on a substrate platform modified by the N-GNRs-Fe-MOFs@AuPNs composite material so as to conveniently and specifically capture a target Gal-3; finally, performing specific binding on the Gal-3 as well as the detection antibody and the capture antibody, thereby obtaining the electrochemical sensor for detecting the blood concentration level of the Gal-3. The sensor is successfully used for detecting the Gal-3 in serum. The electrochemical sensor disclosed by the invention has the advantages of being high in sensitivity, high in specificity, rapid in detection and convenient. An early diagnostic basis is provided for insulin resistance causing the type II diabetes.

The invention discloses a preparation method of a nitrogen-sulfur-phosphorus doped porous graphene oxide material and application of a nitrogen-sulfur-phosphorus doped porous graphene oxide material.According to the invention, a porous graphene oxide material doped with three elements is prepared by taking graphene oxide as a raw material, adding hydrogen peroxide in a hydrothermal condition forpore-forming and adding a dopant containing three elements of nitrogen,sulfur and phosphorus, and is applied to the electrode material of a supercapacitor. The three-dimensional porous structure is etched on the surface of graphene by using hydrogen peroxide with the strong oxidizing property, so that the specific surface area of a graphene material is further improved, the obtained porous graphene oxide is subjected to ultrasonic dispersion and then is fully mixed with a doping agent containing three elements of nitrogen, phosphorus and sulfur, nitrogen, sulfur and phosphorus heteroatoms areintroduced into the porous graphene oxide to improve the electrochemical performance of the graphene, and the porous graphene oxide is loaded on a conductive current collector to prepare a supercapacitor electrode, so that the capacitor obtains the better capacitance performance and has the good circulation stability.

The invention relates to the field of lithium batteries, in particular to a composite anode structure and a preparation method thereof, an all-solid-state lithium battery cell and an all-solid-state lithium battery. The composite anode structure comprises an anode layer and a passive coating layer formed on one surface of the anode layer; the anode layer comprises a metal mesh skeleton and lithiummetal composited into the metal mesh skeleton by means hot pressing; the all-solid-state lithium battery cell comprises the composite anode structure; the all-solid-state lithium battery comprises one or multiple all-solid-state lithium battery cells which are in series or parallel connection. According to the technical scheme, the all-solid-state lithium battery has the advantages of small volume change of lithium metal anodes and uniform electro-deposition in charging and discharging, forming of lithium dendrites can be suppressed effectively, and further cycle life and service life of theall-solid-state lithium battery can be prolonged effectively.

The invention discloses a preparation method of a high-nickel ternary NCM622-nanowire material. The method comprises the following steps: weighing certain amounts of a lithium source, a nickel source, a cobalt source and a manganese source according to a certain element mole ratio, adding the weighed sources into ethanol in order to a uniform and transparent solution; weighing a certain amount of polyvinylpyrrolidone, adding the polyvinylpyrrolidone into the above solution, and magnetically stirring the polyvinylpyrrolidone and the solution to completely dissolve the polyvinylpyrrolidone; weighing a certain amount of organic sugar used as a water absorption inhibitor into the above solution, and continuously stirring the organic sugar and the solution to completely dissolve the organic sugar; transferring the obtained solution into a syringe, carrying out electrostatic spinning, and receiving nano-fibers by aluminum foil; sintering the above obtained product in air; and carrying out high temperature calcination on the sintered product in an argon atmosphere to obtain the high-nickel ternary NCM622-nanowire material. The finally obtained product is made of nanowires formed by interconnecting LiNi0.6Co0.2Mn0.2O2 particles, has a high specific capacity and a good structure stability as alithium ion battery positive electrode active material, and improves the cycle stability and the rate performances of the lithium ion battery positive electrode active material.

The invention provides a solid electrolyte membrane and a lithium ion battery. The solid electrolyte membrane comprises solid electrolyte crystal particles and a binder, wherein a general formula of a solid electrolyte crystal is (LimZn)MP2X12, and the solid electrolyte crystal belongs to a triclinic system and a P1 space group; Z refers to high-valence metallic elements, the valence of the Z is larger than 1 and smaller than or equal to 3; the high-valence metallic elements Z comprise at least one of Mg, Al, Ca, Ti, Cu, Zn, In, Sr, Ru, Rh, Pd, Ag, Cd, Ba, Qs, Ir, Pt and Hg; M is at least one of Ge, Si, Sn, Al and P; X is at least one of O, S and Se; m is a rational number from 8 to 11; n is a rational number from 0-2; in the solid electrolyte membrane, a plane included angle Alpha1 of the crystal axis c axis direction of more than 80% of (LimZn)MP2X12 and the solid electrolyte membrane is larger than or equal to -15 degrees and is smaller than or equal to 15 degrees. The lithium ion battery comprises the above solid electrolyte membrane. Therefore, the conduction velocity of Lithium-ions can be effectively improved, and the rate capability and the cycle performance can be improved effectively.

The invention relates to a method for preparing a three-dimensional germanium/carbon nano composite film through ionic liquid electrodeposition, which relates to the method for preparing the germanium/carbon nano composite film. The method solve the technical problem that the circularity and multiplying power performance of a lithium ion battery are reduced during a charge and discharge process by a germanium cathode material of the current lithium ion battery. The method comprises the following steps: 1)electrophoretic deposition; 2)preparation of an ionic liquid electrodeposition liquid; 3)constant potential deposition; and 4)cleaning and drying. The prepared three-dimensional germanium/carbon nano composite film can effectively enhance the combination force between an active material and a current collector, volume expansion of the active material is reduced, transmission rate of the lithium ion and electron in the cathode material are increased, and the cycle performance, multiplying power performance and safety performance of the lithium ion battery are effectively increased.

The invention relates to the field of lithium ion batteries, and specifically relates to a novel composite cathode material for lithium ion batteries. An Li3V2(PO4)3 material is taken as a core, a fast ion conductor type solid electrolyte is embedded in a carbon-coated layer, and a double coated core-shell structure is formed with carbon, the lithium ion conduction speed of the lithium vanadium phosphate material is improved in a targeted manner, the defect that the electronic conductivity of the lithium vanadium phosphate material is recovered, and the lithium ion conduction speed can also beimproved obviously, so that the performances of the lithium vanadium phosphate cathode material are improved relatively comprehensively, the impedance is reduced, the specific capacity is improved, the circulation and rate performance is improved.

The invention provides a preparation method of a ternary precursor, and belongs to the technical field of lithium ion battery materials. A technology combining intermittent concentration with a separation kettle is adopted to stably control the reaction condition of each step. The growth of secondary particles of a precursor is controlled by gradually reducing the pH in the reaction process, and the structure of the precursor is gradually changed from loose to dense by setting a precise clearing amount. The solid content of a slurry in a kettle is adjusted through the separation kettle to makethe precursor have a multilayer core-shell design with a loose-compact structure. The precursor prepared in the invention has the advantages of narrow particle size distribution, good sphericity degree and uniform size, has the multilayer core-shell with the loose-compact structure, and has enough space during circulation and crystal form mutation to avoid structural collapse and ensure the circularity, stability and safety of the precursor. Compared with precursors with internal complete voids, the ternary precursor of the invention has the advantages of compact and stable structure, high energy density, and solving of the problems of poor circularity, stability and safety of common ternary precursors.

The invention relates to a method of preparing proton exchange compound film used for a fuel cell, a preparing method of proton exchange compound film used for a high temperature proton exchange film fuel cell, and the preparing method as follows: (1) immersing the proton exchange film into a mixed solution of oxide precursor and alcohol in a bulk ratio of 1 to 5-3 to 2, and sealing and placing at normal temperature for 10-14 hours; (2) taking the film out of the mixed solution, and blotting the solution on the film surface with filter paper; (3) immersing the film into a mixed solution of alcohol and water in a bulk ratio of 1 to 1-5 to 1 and blending for 1-30 minutes; (4) taking the film out, firstly airing at room temperature and then drying at 100 deg.C in vacuum for 6-48 hours. The product prepared has the characters of being able to effectively working at 80deg.C-140deg.C, and higher water -absorbing and -preserving abilities.

The invention discloses lithium cobaltate for a positive electrode of a lithium ion battery and a preparation method of the lithium cobaltate for the positive electrode of the lithium ion battery. The proportional formula of the lithium cobaltate prepared by adopting the method is shown as LixCoyMzO2, wherein M represents for one or two of transition metal elements except Co or alkaline earth metals elements; S represents for an average valence of all metal elements of the lithium cobaltate except lithium and cobalt; a mole ratio of four elements in the positive material-lithium cobaltate is x to y to 2 to 2; S is greater than or equal to +2 and less than +2.5; x is greater than or equal to 0.9 and less than or equal to 1.1; y is greater than or equal to 0.8 and less than or equal to 1.1; x plus 3y plus S*z is equal to 4. The lithium cobaltate prepared by adopting the method has the high volume capacity density, the high safety, the stable charge-discharge cycle performances and the high compaction density.

The invention relates to a silencer comprising an inlet pipe, an outlet pipe, a hollow expansion cavity formed between the inlet pipe and the outlet pipe, and a perforated acoustic metamateiral bafflearranged vertically or obliquely at the internal cross section of the hollow expansion cavity. The a perforated acoustic metamateiral baffle includes a frame; a constraint body in rigid connection with the frame is arranged inside the frame; a thin film covers the surface of the frame; and through holes are formed in the constraint body and the thin film. In addition, the invention also relates to an improved silencer; and occurrence of standing wave damping valley of the traditional resistant silencer is avoided and the good low-frequency noise elimination effect is realized. In addition, according to another embodiment, the invention also relates to an improved silencer, so that a problem of the direct contact between the sound absorption material and the fluid is solved. And accordingto another embodiment, the invention also relates to a silencer for improving the heat transfer efficiency of the fluid medium at the two sides of the hole by using vibration of a perforated acousticmetamateiral baffle. Besides, the invention also provides a method for frequency modulation and preparation of a perforated acoustic metamateiral baffle and a method of assembling the silencer. The silencer has characteristics of compact structure, simple process, stable performance, and long service life.

Relating to the technical field of lithium ion batteries, the invention discloses a preparation method of a lithium ion battery composite diaphragm. The method includes the steps of: preparation of modified graphene, preparation of modified graphene dispersion liquid, preparation of a modified graphene/organic polymer, and preparation of the diaphragm. According to the invention, the modified graphene/organic polymer is precipitated on the surface of a polyolefin diaphragm, the prepared composite diaphragm has the chemical stability, electrochemical stability, thermodynamic stability, flexibility and high porosity of an organic polymer modified diaphragm and the high mechanical strength, fast heat dissipation and other characteristics of graphene, the modifying phenylcarboxyl on graphene can interact with lithium ions in the electrolyte solution, the desolvation degree of lithium ions can be enhanced to improve the lithium ion conduction rate, the hydrophilic group carboxyl also can improve the wettability of a base membrane to the electrolyte solution, and the prepared lithium ion composite diaphragm can improve the safety performance and electrochemical performance of lithium ionbatteries.

The invention relates to a manufacturing method of a high power type lithium battery system, which is characterized by selecting proper material formulas of the positive electrode and the negative electrode of a lithium ion battery, winding an electronic core for 4-5 layers in the manufacturing process and selecting a diaphragm of 9-20mu m between the positive electrode and the negative electrode, 'I'-shaped aluminum sheets or aluminum alloys and 'U'-shaped aluminum sheets or aluminum alloys are used for tightly packing more than two single batteries in the single battery assembling process. The invention achieves the purposes of further improving the conductivity of the battery and reducing the internal resistance, thereby reducing the generation of the heat of the lithium ion battery under the same conditions, basically lowering the temperature of the battery in large-current working process, and ensuring that the system of the invention works safely, reliably and efficiently under the condition of high-rate discharge.

The method includes following steps: (1) N-type gallium nitride layer, luminescence active region and P type gallium nitride layer is developed on sapphire etc. insulated substrate; (2) P-type ohmic contact electrode is prepared on P-type gallium nitride layer in tube core; (3) sapphire insulated substrate is thinned to between 70 micros to 150 micros; (4) brazing metal layer in size correspondent to size of P type ohmic contact electrode in tube core is vaporized on a supporter, where silicon dioxide or silicon nitride etc. dielectric isolation layer is deposited on; (5) hole is prepared on P-type ohmic contact electrode in tube core, vaporizing or plating metal layer on back face of the supported with hole being made, and P-type electrode in tube core is led out; (6) a metal layer is deposited on side at back face of tube core reverse welded through photo etching and evaporation method; (7) welding P-type ohmic contact electrode in supporter of single tube core to heat sink.

The invention relates to methods for detecting potassium ions, in particular to a solid contact type ion-selective electrode and preparation and application thereof. The solid contact type ion-selective electrode is characterized in that MoS2 in flower-like morphology is used as the ion-electron conduction layer of the solid contact type ion-selective electrode, and a potassium ion selective film is attached to the ion-electron conduction layer. The solid contact type ion-selective electrode has the advantages that the MoS2 in flower-like morphology is used as the conduction layer between a polymer-film and platinum-carbon electrode, the MoS2 is large in capacitance and good in electric conductivity, the prepared electrode is allowed to be good in stability and reproducibility, and accordingly the electrode is applicable to large-scale commercial production.