456results about How to "Cyclic stability" patented technology

The invention relates to organic-inorganic all-solid-state composite electrolyte as well as preparation and application methods thereof, belonging to the field of lithium ion batteries. According to the organic-inorganic all-solid-state composite electrolyte, a highly-ordered three-dimensional connection network skeleton is formed by an inorganic fast lithium ion conductor, and a three-dimensional connection network is filled with a polymer and lithium salt. The organic-inorganic all-solid-state composite electrolyte which is flexible and has a controllable three-dimensional connection network structure is prepared. The electrolyte is high in lithium ion conductivity, wide in electrochemical window, good in mechanical property and stable to lithium metal. A lithium ion secondary battery assembled by a composite electrolyte membrane prepared by the method is high in capacity, stable in cycle performance, low in interface impedance and good in interface stability.

A composite carbon material of negative electrode in lithium ion, which is made of composite graphite, includes a spherical graphite and a cover layer, wherein the cover layer is pyrolytic carbon of organic substance. Inserted transition metal elements are contained between layers of graphite crystal. Preparation of the negative electrode includes the steps of: crushing graphite, shaping to form a spherical shape, purifying treatment, washing, dewatering and drying, dipped in salt solution doped by transition metal in multivalence, mixed with organic matter, covering treatment, and carbonizing treatment or graphitization treatment. The negative electrode provides advantages of reversible specific capacity larger than 350 mAh/g, coulomb efficiency higher than 94% at first cycle, conservation rate for capacity larger than 8-% in 500 times of circulation.

A rechargeable energy storage device is disclosed. In at least one embodiment the energy storage device includes an air electrode providing an electrochemical process comprising reduction and evolution of oxygen and a capacitive electrode enables an electrode process consisting of non-faradic reactions based on ion absorption/desorption and/or faradic reactions. This rechargeable energy storage device is a hybrid system of fuel cells and ultracapacitors, pseudocapacitors, and/or secondary batteries.

The present invention provides Ligand-Drug Conjugates comprising a PEG Unit in a parallel orientation to the Drug Unit. The invention provides inter alia, Ligand-Drug Conjugates (LDCs), methods of preparing and using them, and intermediates thereof. The Ligand-Drug Conjugates are stable in circulation, yet capable of inflicting cell death on targeted cells or inhibiting proliferation of targeted cells once its drug cargo is released in the vicinity or within targeted cells. In principle embodiments, an LDC of the present invention is represented by the structure of Formula I.

The invention discloses a lithium ion battery cathode composite material and a preparation method thereof. The invention aims to lower the cost of the cathode material of the lithium ion battery and enhance the conductivity thereof. Graphite is used as the substrate of the material, and an organic polymer and/or high molecular conducting polymer are/is coated outside the substrate. The preparation method comprises the following steps: purifying or graphitizing natural crystalline flake graphite, microcrystal graphite, crystallized veined graphite or needle coke and petroleum coke to obtain the graphite substrate, mixing the graphite substrate and the organic high molecular polymer and/or high molecular conducting polymer liquid phase, spray-drying, and carrying out oven-drying to obtain the lithium ion battery cathode composite material. Compared with the prior art, the invention has the advantages of simplified technique, firmer and more compact coating layer, and stable circulation of the lithium ion battery; the powder resistivity is below 7*10<-6> omega m; and when the material is used for manufacturing the pole piece of the battery, the use amounts of adhesive and conducting agent are reduced in the pole piece manufacturing process, thereby lowering the battery cost.

There is disclosed an improved differential amplifier (20) having a feedback loop that generates an amplified output signal (Vout) from an input signal (Vin) supplied by a preceding stage. It comprises an input matching circuit (11) connected to said preceding stage, a buffer (22) and an amplification section (12) connected in series in the direct amplification line, a first amplifier (16), a RC network (17′) and a second amplifier (23) connected in series in a parallel loop between the outputs and the inputs of the amplification section that generate the feedback signal. The role of said buffer and second amplifier associated in a dedicated direct and feedback signal combining block (21) is to respectively isolate the input signal and the feedback signal from the summing nodes (A′,B′) at the amplification section inputs. As a result, the summation of the input signal and the feedback signal is improved, the DC component of the output signal is filtered out in order to significantly reduce the DC offset. In addition, the input impedance matching represented by parameter S₁₁ is considerably improved.

The invention discloses a high-voltage lithium cobalt oxide cathode material for a lithium-ion battery and a preparation method of the high-voltage lithium cobalt oxide cathode material. The high-voltage lithium cobalt oxide cathode material is prepared from a doped lithium cobalt oxide matrix and a coating on the surface of the doped lithium cobalt oxide matrix, wherein a general formula of the doped lithium cobalt oxide matrix is Li<x>Co<1-y>M<y>O<2-z>N<z>; the general formula of the coating is LiNi<x'>Co<y'>Al<z'>O<2>; and the preparation method comprises the following steps: firstly, obtaining the lithium cobalt oxide matrix Li<x>Co<1-y>M<y>O<2-z>N<z> through once sintering; secondly, preparing a lithium cobalt oxide cathode material precursor coated with Ni<x'>Co<y'>Al<z'>(OH)<2> on the surface by liquid-phase co-precipitation reaction; and finally obtaining the high-voltage lithium cobalt oxide cathode material through twice sintering. The high-voltage lithium cobalt oxide cathode material prepared by the method is good in processability and high in compaction density, has relatively high specific capacity and good cycle performance in a high-voltage state, and can be stably circulated at high voltage of 3.0V to 4.5V.

The invention relates to a water-based zinc-manganese single flow battery; a positive electrode active material is an oxide of manganese, a metal composite oxide, a metal oxide or a carbon material, a negative electrode is a zinc electrode, an electrolyte solution is a nearly neutral aqueous solution containing a zinc salt and a manganese salt, positive electrode active ions and negative electrode active ions can coexist in one electrolyte solution, and an ion exchange membrane is not required for separating the positive electrode and the negative electrode; in processes of charging and discharging, the electrolyte solution constantly flows between an electrolyte solution storage tank and an electric pile through a pipeline under pushing of a liquid pump. During charging, zinc ions are deposited onto a negative electrode current collector from the electrolyte solution, the zinc ions and manganese ions are co-embedded into the positive electrode active substance at the same time, and the manganese ions are subjected to oxidation deposition; during discharging, the negative electrode deposited zinc is dissolved into the electrolyte solution, and the positive electrode manganese oxide is partially reduced and dissolved and is extricated to the electrolyte solution with the zinc ions simultaneously. The battery has the outstanding characteristics of simple manufacture, relatively high specific energy and specific power, low cost, long cycle life, environmental friendly and the like, and is widely applied in electric power, transportation, electronics and other fields.

The invention belongs to the technical field of batteries, and particularly relates to an aqueous lithium (sodium) ion battery mixed negative material. The mixed negative material is prepared by mixing three materials including ion embedded type compounds, conductive materials, organic compounds capable of reversibly storing alkali metal or alkaline earth metal ions or high-molecular polymers in a certain mass proportion; a mixing way comprises the steps of in-situ growth and direct mechanical mixing of all the composition parts. An aqueous lithium (sodium) ion battery assembled by using the mixed electrode material as a negative electrode has the characteristics of long cycle life, high power, high security, low cost and no environment pollution, and is particularly suitable for power batteries used in short-distance electromobiles and energy storage batteries used in smart power grids.

The invention provides a negative electrode plate for a lithium metal battery. Metallic lithium plates and sponges are compressed to obtain the negative electrode plate. The negative electrode plate has the advantages that the traditional lithium metal battery structures can be simplified when the negative electrode plate is applied to the lithium metal battery, electron barrier effects can be realized by sponge elastic interface layers instead of diaphragms, and volume change and the instability of interfaces inside the battery can be relieved by elastic interface materials in battery cycle;sponge medium layers are excellent in electrolyte solution wettability, and are high in thermal deformation resistance as compared with common polypropylene diaphragms; elastic three-dimensional framework structures of the sponges are favorable for inhibiting dendrite growth in lithium metal battery cycle procedures and relieving the volume change of negative electrodes, and accordingly further development of the lithium metal battery can be promoted from another angle by composite metal lithium negative electrodes which are designed by the aid of sponge materials and are free of diaphragm structures.

The invention discloses a secondary battery module, which comprises a unit cell group having a plurality of unit cells and a case housing the unit cell group inside, and the plurality of unit cells are arranged at predetermined intervals with each other. A heat transfer medium for controlling the temperature of the plurality of unit cells circulates in the case. The first distribution plate is fixedly disposed in the casing adjacent to the battery pack, and distributes the heat transfer medium among the plurality of battery cells. The second distribution plate is slidably disposed on the first distribution plate to distribute the heat transfer medium among the plurality of unit cells.

The invention relates to an aqueous adhesive used for a sulfur cathode and applications thereof. The aqueous adhesive is plant glue or composite glue. The plant glue is one or more selected from a group consisting of guar gum, linseed gum, fenugreek gum, agar, tara gum, peach gum, gutta percha or karaya gum. The composite glue is composite glue formed by the plant glue with carbonyl-beta-cyclodextrin, sodium carboxymethyl cellulose or poly(vinyl alcohol). The aqueous adhesive, a sulfur-containing material and an electric conductive agent are uniformly dispersed in water according to a mass ratio of 7-9:0.5-1.5:0.5-1.5, and then a current collector is coated with the mixture, dried and then pressed into a sheet to prepare a secondary lithium-sulfur battery cathode. Compared with the prior art, the aqueous adhesive has obvious advantages of environment protection, a low cost, and the like, a cathode preparing process is simple and the aqueous adhesive has a good application prospect.

The invention discloses a CMK-5 type mesoporous carbon-nano inorganic substance composite material, a preparation method and application thereof. The composite material is inorganic substance nano particles of 3 to 6 nanometers, wherein the nano particles are uniformly filled in pores of thin-wall ordered tubular mesoporous carbon of a CMK-5 carrier; and the nano inorganic substance is selected from SnO2, Fe2O3, NiO, CuO, Co3O4, Li4Ti5O12, LiFePO4 and S. The CMK-5 type mesoporous carbon is thin-walled, ordered and tubular, and has the wall thickness of 1 to 3 nanometers. The content of the nano inorganic substance in the composite material is 10 to 80 weight percent, the composite material can keep ordered structure, the size of the inorganic substance nano particles can be controlled to be between 3 and 6 nanometers, and the inorganic substance nano particles are uniformly filled between the thin carbon walls of the ordered tubular mesoporous carbon and are not agglomerated. The reversible capacity of the composite material can be maintained between 500 and 1,100 mAh g<-1> under the current density of 200 mA g<-1>, and the capacity is nearly not attenuated after 30 to 100 times of circulation.

The inkjet recording apparatus includes: a supply manifold having an inlet port to which a first main flow channel is connected, the liquid supplied from a tank through the first main flow channel being stored in the supply manifold, the supply manifold being connected to supply ports of head modules; a collection manifold having an outlet port to which a second main flow channel is connected, the liquid to be collected to the tank through the second main flow channel being stored in the collection manifold, the collection manifold being connected to discharge ports of the head modules; and a first bypass flow channel which connects the supply manifold to the collection manifold, wherein an end of the first bypass flow channel is connected to an upper side of an end of the supply manifold on a side opposite to a side where the inlet port is arranged.

The invention discloses a graphite material with case structure, which is composed of graphite inner-core and case on the inner core, wherein the case is graphite structure.

The invention relates to a silver loaded mesoporous silicon oxide coated ternary cathode material, and a preparation method and applications thereof. The preparation method comprises the following steps: dissolving lithium salts, nickel salts, cobalt salts, and manganese salts into a uniform medium, wetting the mixture by two chelating agents, adding ammonia liquor, adding a solution of two chelating agents into the inorganic salt uniform medium, heating the mixture under stirring to prepare dry gel; grinding the dry gel into powder, calcining the powder to obtain a ternary material; adding a water solution of the ternary material into tetraethyl orthosilicate, ethanol, and surfactant (cetyl trimethyl ammonium bromide), carrying out centrifugal precipitation, drying the precipitates, calcining the precipitates to obtain a silica-ternary shell-core cathode material; dissolving silver oxide into water to obtain a solution A; dissolving PVP into water to prepare a solution B; dropwise adding the solution B into the solution A to obtain a solution C; adding the silica-ternary shell-core cathode material into the solution C to obtain a solution D; dropwise adding a reducing agent into the solution D, and finally carrying out washing, suction filtration, and drying to obtain the final product. The preparation method is simple, the technological conditions are easy to realize, the energy consumption is low, and the preparation is pollution-free.

The invention discloses a zwitter-ion-contained multiple acid-sensitive anti-tumor drug-loading micelle, and a preparation method and an application thereof, and belongs to the field of biological materials. The zwitter-ion-contained multiple acid-sensitive anti-tumor drug-loading micelle comprises a zwitter-ion hydrophilic shell and a lyophobic core containing two acid-sensitive bonds. The method includes the steps: separating methanol from hydroxyethyl acrylate and 2,2-dimethoxypropane and synthesizing 2,2-di(acryloyloxy-1-oxethyl) propane by an alcohol exchange method; connecting open-loop beta-propiolactone with 2-(dimethylamino) ethyl methacrylate to synthesize carboxybetaine methacrylate; obtaining a carboxybetaine methacrylate monomer polymer by an atom transfer free radical polymerization method; synthesizing triblock amphiphilic polymers by the atom transfer free radical polymerization method and a Michael addition one-pot method, and preparing the drug-loading nano-micelle by an ultrasonic drop method and a dialysis method. By aid of the drug-loading micelle, anti-tumor effects of chemotherapeutic drugs can be improved.

The invention discloses a supercritical carbon dioxide shaft multi-phase flow simulation test device mainly comprising a shaft multi-phase flow simulation test bench, a carbon dioxide storage tank, a booster pump, a heater, a separator, a cooler and the like which form a main circulating loop. According to the supercritical carbon dioxide shaft multi-phase flow simulation test device, a simulation shaft is visualized through a window design, so that the flow pattern and flow state of supercritical carbon dioxide shaft annular multi-phase flow can be tested by an external instrument; the supercritical carbon dioxide shaft multi-phase flow simulation test device can carry out real-time acquisition and analysis to pressure, temperature, flow, solid-phase concentration, supercritical carbon dioxide annular flowing rate, solid-phase particle speed and the like together with an external measuring instrument; and during a test, the circulating use of supercritical carbon dioxide can be realized. The supercritical carbon dioxide shaft multi-phase flow simulation test device has wide purposes, not only can take a supercritical carbon dioxide shaft multi-phase flow test, but also can take a multi-functional expansion test.

The invention relates to a MRI (magnetic resonance imaging)-guided targeted photo-thermal agent and a preparation method of a chemotherapeutic system of the MRI-guided targeted photo-thermal agent. The method comprises the following steps: by using a hydrothermal method, preparing superparamagnetic ferroferric oxide nano-particles on PEI modified MoS2 in an in-situ preparation mode, thus obtaining a PEI modified MoS2 nano composite; preparing polyethylene glycol coupled targeting molecules by using EDC chemical; by using an EDC chemical, connecting polyethylene glycol with the targeting molecules to the PEI modified MoS2 nano composite in a covalent linkage mode; and through physical adsorption, loading a micromolecular anti-tumor drug on a carrier. The method disclosed by the invention is easy to operate and simple in step, and the prepared multi-functional MoS2 nano composite is good in biological compatibility, can be specifically gathered at tumor sites so as to effectively kill tumor cells, and can effectively integrate early diagnosis and late treatment so as to realize the integration of diagnosis and treatment of cancer treatment.

The invention belongs to the field of batteries, and discloses a bi-imidazole ring functional ionic liquid, a preparing method thereof, an electrolyte and a lithium secondary battery. The di-imidazolering functional ionic liquid comprises divalent cations with bi-imidazole rings and ether group functional groups and two anions. The bi-imidazole ring functional ionic liquid has higher thermodynamic stability, electrochemical stability and positive and negative electrode compatibility. Moreover, the preparing method is simple, the product is high in purity and good in hydrophobicity, the thermal decomposition temperature can reach 430 DEG C, the room-temperature conductivity can reach 10<-4>S/cm, the electrochemical window can reach 5.6V vs.Li/Li+, and the safety of the lithium secondary battery can be improved. A bi-imidazole ring ionic liquid electrolyte can effectively inhibit reductive decomposition of imidazolium cations on a graphite negative electrode specially in a graphite negative electrode system, a stable SEI membrane can be formed without addition of any low-boiling-point film-forming additive, so that the battery can be stably circulated under the conditions of normaltemperature and high temperature, and has very high practical application value.

The invention relates to a method for preparing an all-solid-state electrochromic device. The device comprises an ITO (Indium Tin Oxide) glass substrate, an electrochromic layer, an electrolyte layer, an ion storage layer and a top ITO layer sequentially. The preparation method comprises the following steps: (1) preparing the electrochromic layer; (2) preparing the electrolyte layer; (3) preparing the ion storage layer; (4) preparing the top ITO layer. The method disclosed by the invention has the advantages that due to the preparation method disclosed by the invention, lithium ions used in the traditional electrochromic device are replaced with aluminum-lithium double ions, and an electrochromic material and an ion storage material applicable to the aluminum-lithium ions are selected, namely a WO3 film and a NiO composite material, so that the cycle color change life of the prepared device is further greatly prolonged, and the coloring efficiency is excellent.

The invention provides a preparation method for a MoS2@C composite electrode material with lignin as a carbon source. According to the preparation method, sodium lignosulfonate is used as a carbon source; a sample is allowed to become a microsphere under the action of a proper solvent and ultrasonic treatment; then molybdenum disulfide is directly synthesized by using a hydrothermal method and is allowed to grow on the surface of lignin; high-temperature pyrolysis is carried out to prepare a desired molybdenum disulfide-modified porous microsphere carbon material; and the electrochemical performance of the sample is tested and analyzed. The invention has the beneficial effect that the prepared MoS2@C composite electrode material has the characteristics of a high specific surface area, good cycle and heavy-current charging/discharging stability, high specific capacitance, etc.