81results about How to "Facilitates ion transport" patented technology

Improved ion focusing for an ion mobility drift cell allows for improved throughput for subsequent detection such as mass detection. Improved focusing is realized by the use of alternating regions of high and low electric fields in the ion mobility drift cell.

Improved ion focusing for an ion mobility drift cell allows for improved throughput for subsequent detection such as mass detection. Improved focusing is realized by the use of alternating regions of high and low electric fields in the ion mobility drift cell.

In various embodiments of the invention, a device permits more efficient collection and transmission of ions produced by the action of a carrier gas containing metastable neutral excited-state species into a mass spectrometer. In one embodiment of the invention, the device incorporates the source for ionization in combination with a jet separator to efficiently remove excess carrier gas while permitting ions to be more efficiently transferred into the vacuum chamber of the mass spectrometer. In an embodiment of the invention, improved collection of ions produced by the carrier gas containing metastable neutral excited-state species at greater distances from between the position of the analyte and the position of the mass spectrometer are enabled.

Improved ion focusing for an ion mobility drift cell allows for improved throughput for subsequent detection such as mass detection. Improved focusing is realized by the use of alternating regions of high and low electric fields in the ion mobility drift cell.

The invention belongs to the technical field of a battery and particularly relates to a stable lithium metal negative electrode. The stable lithium metal negative electrode comprises a negative electrode current collector and a negative active material layer loaded on the surface of the current collector; the negative active material layer is a lithium metal layer; the negative electrode current collector comprises a current collector body and a lithium-philic nanometer array growing on the current collector body in situ; the thickness of the lithium-philic nanometer array is 0.8 <mu>m to 20 <mu>m. Compared with the prior art, the stable lithium metal negative electrode has the following advantages: the lithium-philic nanosheet array is arranged on the current collector body, so that ion transmission is facilitated, uniform distribution of lithium ions can be realized, the affinity of the stable lithium metal negative electrode and the lithium metal can be improved, a lithium-philic nucleation site is provided, and uniform nucleation and stable deposition of the lithium metal in the deposition process are realized. The array structure growing in situ can guarantee to be in tight contact with a copper current collector and reduce the effective current density of the electrode, so that uniform deposition of the lithium metal is realized; the lithium-philic current collector can inhibit the growth of lithium dendrites.

The invention relates to a sodion-embedded manganese dioxide nanometer sheet electrode as well as a preparation method and an application of the electrode. The electrode can be used as the active material of a supercapacitor and comprises sodion-embedded manganese dioxide nanometer sheets evenly distributed on the surface of a foamed nickel substrate. The preparation method comprises the following steps of: (1) mixing sodium sulfate and manganese acetate to prepare an electrochemical deposition precursor solution; (2) setting up an electrochemical deposition platform through a three-electrode method and taking the foamed nickel substrate after pretreatment as a working electrode, a platinum electrode as a counter electrode and a saturated calomel electrode as a reference electrode; (3) soaking the electrodes in the electrochemical deposition precursor solution at same depth; (4) opening an electrochemical workstation, setting the working electrode to the anode, setting the working mode to a timing potential mode, and starting up the electrochemical workstation; (5) taking out and washing the working electrode after the electrochemical workstation stops working; and (6) drying to obtain the sodion-embedded manganese dioxide nanometer sheet electrode. The sodion-embedded manganese dioxide nanometer film electrode as well as the preparation method and the application of the electrode disclosed by the invention have the characteristics of simple technique, mild reaction condition and excellent electrochemical performance of materials.

The invention discloses a carbon nanosphere / sulfur composite and a preparation method and application thereof. The carbon nanosphere / sulfur composite comprises a carbon nanosphere and elemental sulfur; the carbon nanosphere is composed of petal-shaped carbon plates which are combined into a sphere shape, gaps exist between the carbon plates, and the carbon plates are arranged in a wrinkled form and provided with through holes; the elemental sulfur and the carbon nanosphere are combined through a fusion permeation method to form the carbon nanosphere / sulfur composite, wherein sulfur accounts for 75-84 wt% of the composite. The gaps and through holes in the carbon nanosphere facilitate fusion loading of sulfur and dispersion and transportation of electrolyte ions, and the carbon nanosphere with a large specific surface area can load more sulfur active substances and effectively inhibit dissolution of polysulfide; the nitrogen element is doped on the carbon nanosphere to improve the electroactivity of a carbon material and enhance physisorption on sulfur; the carbon nanosphere / sulfur composite can serve as a positive electrode of a lithium-sulfur battery to improve the capacity, rate capability, cycling stability and coulombic efficiency of the lithium-sulfur battery.

The invention discloses a nickel-cobalt oxide material and a preparation method thereof. The invention belongs to the field of super-capacitor materials. The nickel-cobalt oxide material is a type of NiCo2O4 hollow nano-spheres comprising at least one layer of NiCo2O4 crystal. A particle size of the NiCo2O4 hollow nano-spheres is 800-1000nm. Because the nickel-cobalt oxide material is hollow nano-spheres, the material has high effective contact area and porosity, such that electrolyte penetration and ionic transmission are facilitated, and large-current discharge is facilitated. A super-capacitor prepared with the nickel-cobalt oxide material provided by the embodiment of the invention has good rate performance.

A new class of low flammability cosolvents comprising saturated C1-C8 alkyl (meth)acrylate oligomers having a molecular weight in the range of from about 160 to 1000 g / mol are disclosed for use in nonaqueous electrolytes for electrochemical cells. A novel process for preparing saturated meth(acrylic) oligomeric electrolyte cosolvents is also disclosed. Secondary electrochemical cells employing an anode, a cathode, and a non-aqueous electrolyte solution comprising these new cosolvents are also disclosed.

An ion guide is disclosed comprising a plurality of electrodes each having apertures which are preferably circular and substantially the same size. The ion guide is preferably maintained in a vacuum chamber at a relatively high pressure.

In various embodiments of the invention, a device permits more efficient collection and transmission of ions produced by the action of a carrier gas containing metastable neutral excited-state species into a mass spectrometer. In one embodiment of the invention, the device incorporates the source for ionization in combination with a jet separator to efficiently remove excess carrier gas while permitting ions to be more efficiently transferred into the vacuum chamber of the mass spectrometer. In an embodiment of the invention, improved collection of ions produced by the carrier gas containing metastable neutral excited-state species at greater distances from between the position of the analyte and the position of the mass spectrometer are enabled.

A mass spectrometer is disclosed having a gas collision cell. An AC or RF ion guide comprising a plurality of ring electrodes which preferably have the same internal diameter is provided within the gas collision cell. The ion guide extends upstream and / or downstream of the gas collision cell so that ions may be continuously radially confined as they pass from a vacuum chamber maintained at a relatively low pressure, through an inlet differential pumping aperture to the gas collision cell, through the gas collision cell and then out of the gas collision cell through an outlet differential pumping aperture.

The invention provides a preparation method of a two-dimensional / one-dimensional heterogeneous nanochannel film. The method is characterized by comprising the following steps that step 1, graphene oxide is dissolved in an aqueous piperazine solution, and ultrasonic treatment is performed at the room temperature to obtain a uniformly dispersed first solution; step 2, the first solution is added dropwise to the upper layer of a porous aluminum oxide film, and after the solvent is evaporated at the room temperature, a first composite film with a graphene oxide film layer and a porous aluminum oxide film layer is obtained; step 3, a benzenetricarbonyl trichloride solution is added dropwise to the upper surface of the graphene oxide film layer of the first composite film, and drying is carriedout to obtain the two-dimensional / one-dimensional heterogeneous nanochannel film. The invention provides the two-dimensional / one-dimensional heterogeneous nanochannel film prepared by using the methodand application of the two-dimensional / one-dimensional heterogeneous nanochannel film in salt difference energy conversion.

The invention belongs to the technical field of electrode materials, and particularly relates to a three-dimensional porous MXene / graphene composite membrane and a preparation method and application thereof. The invention provides a preparation method of a three-dimensional porous MXene / graphene composite membrane. The preparation method comprises the following steps: providing a dispersion liquidof single-lamella MXene and a dispersion liquid of single-lamella graphene oxide; mixing the dispersion liquid of the single-lamella MXene and the dispersion liquid of the single-lamella graphene oxide to obtain a mixed dispersion liquid, and forming a membrane to obtain an MXene / graphene oxide composite membrane; and carrying out a self-propagating reduction reaction on the MXene / graphene oxidecomposite membrane to obtain the three-dimensional porous MXene / graphene composite membrane. According to the preparation method disclosed by the invention, the three-dimensional porous MXene / graphenecomposite membrane can be rapidly prepared, and the three-dimensional porous MXene / graphene composite membrane has relatively high specific capacitance and excellent rate capability when being applied to a supercapacitor.

The present memory device has first and second electrodes, a passive layer between the first and second electrodes and on and in contact with the first electrode, and an active layer between the first and second electrodes and on and in contact with the passive layer and second electrode, for receiving a charged specie from the passive layer. The active layer is a mixture of (i) a first polymer, and (ii) a second polymer for enhancing ion transport, improving the interface and promoting a rapid and substantially uniform distribution of the charged specie in the active layer, i.e., preventing a localized injection of the charged species. These features result in a memory element with improved stability, a more controllable ON-state resistance, improved switching speed and a lower programming voltage.

In various embodiments of the invention, a device permits more efficient collection and transmission of ions produced by the action of a carrier gas containing metastable neutral excited-state species into a mass spectrometer. In one embodiment of the invention, the device incorporates the source for ionization in combination with a jet separator to efficiently remove excess carrier gas while permitting ions to be more efficiently transferred into the vacuum chamber of the mass spectrometer. In an embodiment of the invention, improved collection of ions produced by the carrier gas containing metastable neutral excited-state species at greater distances from between the position of the analyte and the position of the mass spectrometer are enabled.

Vapors of relatively heavy species having molecular weights in excess of 290 amu have not been previously detected in the gas phase at ambient temperature. A method to detect them is taught here based on the use of a mass spectrometer with an atmospheric pressure source. Ions produced in detectable quantities from such heavy vapors are claimed as a new state of matter.

The invention discloses a stretchable supercapacitor with a stainless steel spring adopted as a base. The stretchable supercapacitor includes a stainless steel spring, an inner-layer electrode, an outer-layer electrode, and a gel electrolyte, wherein the stainless steel spring is adopted as the base of the stretchable supercapacitor, the inner-layer electrode and the outer-layer electrode are formed on the surface of the spring through in-situ growth or coat the surface of the spring, and the gel electrolyte is located between the two electrodes; the whole device is encapsulated with a flexible polymer material, so that the leak of the electrolyte can be prevented; the stainless steel spring, on the one hand, is adopted as a current collector of the inner-layer electrode, and on the otherhand, provides excellent stretchability for the device; the inner-layer electrode is made of a material such as a carbon material, a metal oxide and conductive polymer; the electrolyte is made of a polymer / electrolyte gel system such as PVA / H2SO4 and PVA / H3PO4; and carbon nanotubes or MXenes are wound so as to form the outer-layer electrode. The supercapacitor of the present invention can work normally under large tensile strain; the expected tensile strain of the supercapacitor can be as high as 100% under premise that the performance of the supercapacitor is not affected; and the outer spaceof the spring structural component can be efficiently utilized. The supercapacitor can be applied to systems such as high-speed train wireless monitoring systems.

The present invention can be directed to a mass spectrometer, relevant parts thereof like replacement kits or upgrading kits and / or mass spectrometry methods. A mass spectrometer according to the present invention can comprise at least one ion source for generating a beam of ions from a sample. Moreover at least one mass filter downstream of the ion source can be provided and adapted to select ions from the beam by their mass-to-charge ratio (m / z). Furthermore at least one collision cell arranged downstream of the mass filter can be arranged. At least one sector field mass analyser arranged downstream of the collision cell can be further provided and at least one ion multicollector comprising a plurality of ion detectors arranged downstream of the mass analyser, for detecting a plurality of different ion species in parallel and / or simultaneously.

The invention discloses a manufacturing method for a polypyrrole / conductive carbon cloth combined electrode, and application thereof on a supercapacitor. A potentiostatic method is used, a solution containing pyrrole monomer and sodium perchlorate (NaClO4) is used as an electrolyte, a polypyrrole thin film is deposited on the surface of a carbon cloth, and the thin film shows a sheet structure. In1 M KOH electrolyte, electrochemical performance evaluation is performed on the polypyrrole / carbon cloth in -1-0 V potential window range. Compared with performance of a blank carbon cloth and polypyrrole (polypyrrole / Ni) which is loaded on a base of foamed nickel, maximum area specific capacitance of the blank carbon cloth and the polypyrrole / Ni combined electrode is 2.29 F / cm<2>, after 1000 times of circulation, capacity retention ratio is 69.56%, and maximum capacity of polypyrrole / Ni is just 0.064 F / cm<2>. After the polypyrrole is combined with the carbon cloth, maximum specific capacitance can reach 3.18 F / cm<2>, and after 1000 times of circulation, capacity retention ratio reaches up to 96.35%, obviously superior to that of the blank carbon cloth and the polypyrrole / Ni.

In various embodiments of the invention, a device permits more efficient collection and transmission of ions produced by the action of a carrier gas containing metastable neutral excited-state species into a mass spectrometer. In one embodiment of the invention, the device incorporates the source for ionization in combination with a jet separator to efficiently remove excess carrier gas while permitting ions to be more efficiently transferred into the vacuum chamber of the mass spectrometer. In an embodiment of the invention, improved collection of ions produced by the carrier gas containing metastable neutral excited-state species at greater distances from between the position of the analyte and the position of the mass spectrometer are enabled.

The invention discloses a nickel coated carbon fluoride positive electrode material and a preparation method of the nickel coated carbon fluoride positive electrode material. The positive electrode material is prepared by coating the surface of carbon fluoride particles with a nickel-plating layer. The preparation method comprises the steps that the carbon fluoride particles are sequentially sensitized, activated and reduced under a function of dispersing agents and the nickel-plating layer is plated; the carbon fluoride particles coated with the nickel-plating layer are subjected to thermal treatment to obtain the nickel coated carbon fluoride positive electrode material. The preparation method is easy to operate, mild in process conditions and low in cost; the prepared nickel coated carbon fluoride positive electrode material is uniform in coating of nickel-plating layer, stable in structure, and can be used for preparing a lithium carbon fluoride battery with high conductivity, high specific capacity and high power density.

The present invention can be directed to a mass spectrometer, relevant parts thereof like replacement kits or upgrading kits and / or mass spectrometry methods. A mass spectrometer according to the present invention can comprise at least one ion source for generating a beam of ions from a sample. Moreover at least one mass filter downstream of the ion source can be provided and adapted to select ions from the beam by their mass-to-charge ratio (m / z). Furthermore at least one collision cell arranged downstream of the mass filter can be arranged. At least one sector field mass analyser arranged downstream of the collision cell can be further provided and at least one ion multicollector comprising a plurality of ion detectors arranged downstream of the mass analyser, for detecting a plurality of different ion species in parallel and / or simultaneously.

An energy storage apparatus and a method for fabricating the energy storage apparatus. The energy storage apparatus includes a pair of electrodes including an anode and a cathode; an electrolyte at least partially surrounding each of the pair of electrodes; and an encapsulation arranged to encapsulate the electrodes and the electrolyte; wherein the combination of the electrodes, the electrolyte and the encapsulation is mechanically flexible.

The invention provides a negative plate and a lithium ion battery comprising the same. A first negative active material layer in the negative plate is arranged on a bottom layer and comprises a firstbinder resistant to electrolyte swelling, a chemical corrosion resistance effect is better, aging is not prone to happening, long-acting bonding between the bottom layer of active materials and a current collector is guaranteed, and battery cell expansion under quick charging is reduced. The negative plate disclosed by the invention can maintain good mechanical strength and ductility under the soaking of an electrolyte, and ensures that the negative active material layer is not separated from a negative current collector; and a second binder in a second negative active material layer far awayfrom the negative current collector selects a high-swelling material with a solubility parameter similar to that of the electrolyte, the affinity of the high-swelling binder and the electrolyte is better, the infiltration speed of the electrolyte is good, lithium ion conduction is facilitated, and meanwhile, the high-swelling binder is better bonded with a diaphragm in the hot pressing process sothat an interface bonding effect between the negative electrode active material layer and the diaphragm is improved.

This invention presents an ion exchange media including a plurality of cation exchange zones and anion exchange zones in flow paths that are contained in a substantially nonporous resin transport framework. During electrodeionization and other potential applications the ion exchange media of the invention prevents unfavorable water splitting at resin-membrane interfaces and encourages water splitting at resin—resin interfaces where the water splitting may be constructively used to regenerate the resin.

The invention discloses a gel-state electrode and a preparation method thereof. The electrode comprises an electrode active material, a conductive agent, SN, a lithium salt, a polymer and an additive. The preparation method comprises the following steps of dissolving the lithium salt and the additive in SN at 60-80 DEG C, adding the polymer, and fully stirring and dissolving to form a gel-state substance, and then, mixing the prepared gel-state substance, an electrode active material and a conductive agent, stirring or uniformly grinding, and coating one side of a solid electrolyte with the mixture to serve as the gel-state electrode of the solid-state battery. According to the type of the added polymer, whether cross-linking treatment is carried out or not is determined. The lithium salt can be completely dissolved in SN to form a plastic crystal electrolyte, and the selected polymer can also be dissolved in the plastic crystal electrolyte. According to the gel-state electrode provided by the invention, the contact performance between the electrode and the solid electrolyte can be improved, the ion transmission in the electrode can be improved, and the negative effect on the battery performance caused by the volume change generated in the charging and discharging process of the electrode active material can also be inhibited.

The method provides a method for preparing a ternary cathode material through combination of pre-sintering and impregnating and a lithium battery. The method comprises the following steps that S1, a ternary precursor is pre-sintered at 250-900 DEG C to obtain oxide powder of a porous structure, wherein the pre-sintering heat preservation time is 0.1-15 hours, and the pre-sintering atmosphere is oxygen-containing gas with the oxygen content of 20-100%; S2, a lithium source is completely dissolved in a solvent; S3, the oxide powder in S1 is added into the solution obtained in S2 to be uniformlydispersed, and after full impregnation, the solvent is dried by distillation to obtain a powder product, wherein the impregnation temperature is 0-200 DEG C, and the impregnation time is 1-24 hours; S4, the powder product in S3 is sintered to obtain the ternary cathode material. The method solves the problem that existing adopted solid-phase mixed lithium-high temperature sintering difficultly ensures uniform mixing of the lithium source and the precursor, and the molten lithium source can cover the surfaces of secondary particles of the precursor, thereby hindering the further reaction in terms of mass transfer.

The invention belongs to the technical field of material chemistry, particularly relates to a preparation method and application of a high specific capacity lithium ion battery negative electrode material, in particular to a preparation method of using ZIF8 sulfurized composite graphene as lithium ion battery negative electrode material. ZIF 8 is prepared, then a ZnS hollow MOF material is prepared, and the ZnS hollow MOF material is combined with graphene oxide to obtain ZnS hollow MOF material composite graphene. The ZIF8 material is sulfided in the preparation process to prepare porous composite of ZnS and organic ligand, and the composite graphene improves the conductivity of the composite as the lithium ion battery. The defects of poor charge / discharge specific capacity, poor cycle stability and crushing of the electrode material of the lithium ion battery negative electrode material in the prior art can be overcome.

The invention discloses a preparation method of a high-activity nickel positive electrode-based nickel-zinc battery. The preparation method comprises the steps of placing Ni-NiO heterostructure nanometer foamed nickel in a hybrid suspension liquid of nickel chloride and graphene oxide for freezing and drying, performing thermal processing under a hybrid gas of NH3 and Ar to prepare a single atom Ni-graphene modified Ni-NiO heterostructure nanosheet nickel electrode; and taking the nickel electrode as a positive electrode and a zinc electrode as a negative electrode, making the two electrodes separated by a PE-PP diaphragm, filing an electrolyte between the two electrodes, and performing assembly to obtain the nickel-zinc battery. An active material is directly grown on a foamed nickel substrate, and full contact is ensured; moreover, a reaction site is provided by introduction of single atom nickel, the electrode conductivity is improved, and ion transmission is facilitated; and the single atom Ni-graphene modified Ni-NiO heterostructure nanosheet nickel positive electrode is combined with the modified foamed zinc electrode, and stable cycle property is achieved.