77 results about "Ion transportation" patented technology

The present invention describes apparatuses and methods that provide energy to ions in a non-thermal manner. The elevated ion energy minimizes or eliminates interferences due to clustering with polar molecules, such as water. The energized ions are separated in an ion mobility spectrometer. During the ion transportation and separation process, the elevated energy level of ions prevents them from clustering with neutral molecule inside the spectrometer. The additional electric field component only causes ions to reach elevated energy level, whereby the spectrometer can preserve its normal performance, meanwhile avoiding interference from water and other neutral molecules. A RF electric field is applied to the ions in ionization, reaction and separation region of ion mobility spectrometers.

In a cluster ion beam irradiation apparatus including an apparatus for measuring size and energy distribution of gas cluster ions by using the time of flight (TOF) mass spectrometry, a unit for applying a retarding voltage is disposed in a stage preceding a TOF measuring instrument including a drift tube and a current measuring instrument. By measuring the size and energy distribution of the gas cluster ions and adjusting ionization conditions, cluster ions having predetermined energy and size are supplied to a work surface. In addition, a product of a pressure in an ion transportation device and an ion transportation length is controlled so as to satisfy the relation P×L≦30/N^2/3/E^1/2 Pa.m, where N is the size of gas cluster ions used for irradiation, and E is kinetic energy (eV) of the gas cluster ions.

The invention discloses a preparation method of a flexible quick-charging lithium metal battery and belongs to the technical field of lithium batteries. The method comprises the steps of firstly mixing an organic solution of graphene and a carbon nanotube and a binder, and coating the surface of a current collector to prepare a self-supporting pole piece; compounding the self-supporting pole piece and a lithium metal to prepare a lithium-graphene composite electrode or a lithium-carbon nanotube composite electrode or lithium-graphene-carbon nanotube composite electrode; and adopting flexible lithium iron phosphate paper as a positive electrode, composite electrolyte as a diaphragm and the composite electrode as a negative electrode, and assembling to obtain the flexible quick-charging lithium metal battery. The method is simple in operation and significant in effect. The graphene and carbon nanotube skeleton has a high specific surface area, and is capable of effectively reducing the local current density, endowing the electrode with flexible characteristics and achieving fast ion transportation; and the graphene and carbon nanotube skeleton is capable of promoting uniform lithium deposition and inhibiting growth of lithium dendrites, thereby achieving the flexible quick-charging lithium metal battery.

A mass spectrometer using a linear ion trap capable of efficiently suppressing the space charge and enabling scanning for a wide m/z range at a high Duty Cycle is provided. The mass spectrometer comprises: an ion source for ionizing a specimen to generate ions, an ion transport portion for transporting the ions, a linear ion trap portion for accumulating the transported ions by a potential formed axially, and a control portion of ejecting the ions within a second m/z range different from a first m/z range from the linear ion trap portion substantially at the same timing as the timing of accumulating the ions within the first m/z range to the linear ion trap portion, in which the control portion conducts control of ejecting the ions mass selectively from the linear ion trap portion by any of voltage application of (1) applying a supplemental AC voltage between at least a pair of linear ion trap rods constituting the linear ion trap portion, (2) applying a supplemental AC voltage to an end lens constituting the linear ion trap portion, and (3) applying a supplemental AC voltage between inserted lenses, the inserted lenses constituting the linear ion trap portion. The ion transportation portion having a mass selection means for selecting the ions in the first m/z range.

The invention provides a composite electrode material, which comprises an electrode material and a sulfide electrolyte, wherein the sulfide electrolyte coats the electrode material; and a chemical formula of the sulfide electrolyte is one or more of formulas (I) to (III). The sulfide electrolyte coats the surface of the electrode material, so that the interface problem of ion transportation between an electrolyte interface and an electrode interface can be effectively improved by the structure; the transmission efficiency of lithium ions on the surface of the electrode material is improved; the ion transportation resistance between the electrolyte interface and the electrode interface is reduced to improve the cycle performance and the rate capability of the electrode material. An experiment result shows that the specific capacity of an all-solid-state lithium battery assembled by the composite electrode material provided by the invention is reduced to about 550mAhg<-1> from initially about 600mAhg<-1> after 50 charge-discharge cycles; and the descending degree is small, and explains that the electrochemical properties of the battery can be effectively improved by the composite electrode material provided by the invention.

The invention relates to a preparation method of nano hollow structure prussian blue and analogues thereof, in particular to a preparation method of nano hollow structure prussian blue and analogues thereof used for an electrochemical energy storage device. According to the method, the nano hollow structure of the prussian blue and the analogues thereof is prepared by adopting a cation exchange method through taking manganese hexacyanoferrate as a sacrificial template in a solution at room temperature. The preparation method is simple in technical operation, mild in reaction condition and cheap in used raw materials, and has universality for preparation of the nano hollow structure prussian blue and the analogues thereof; and obtained products have the characteristics of being uniform in shape, controllable in wall thickness and large in specific surface area. When the nano hollow structure prussian blue and the analogues thereof are used as electrode materials for the electrochemicalenergy storage device, reaction sites are greatly improved through a nanoscale shell and the hollow structure; meanwhile, improvement of ion transportation is facilitated; and an assembled device hasexcellent electrochemical properties.

The present invention provides a Co3O4/MnO2/PPy nanowire array. The array comprises a Co3O4/MnO2/PPy nanowire array core and a PPY shell layer warping the surface of the Co3O4/MnO2/PPy nanowire array core; and the Co3O4/MnO2/PPy nanowire array core comprises a Co3O4 nanowire array core grown on a substrate and an MnO2 shell layer warping the surface of the Co3O4 nanowire array core. The Co3O4 nanowire array being perpendicular to the substrate is grown on the substrate, a Co3O4 nanowire is taken as a core, the electrochemical process is employed to prepare MnO2 and PPy multiple complex shell layers at the surface of the Co3O4 nanowire array core so as to obtain Co3O4/MnO2/PPy multiple core-shell structure nanowire array composite electrode materials with high specific surface area, high conductivity and high ion transportation performance.

The invention belongs to the technical field of lithium-ion batteries, and particularly discloses a solid-state lithium-ion battery of a hybridized nanostructure and a preparation method of the solid-state lithium-ion battery. A solid-state lithium-ion battery structure hybridized by an LLTO nanometer column array and an organic polymer electrolyte is designed. A more orderly penetrating channel is provided for lithium ion transportation in the battery through the nanometer column array, and the specific surface area of a phase interface is large and ordered, thereby improving the ionic conductivity and providing a powerful foundation for research on a conduction mechanism of the hybridized electrolyte.

The invention discloses a rheological phase method for preparing sodium-doped positive pole material lithium vanadium phosphate of a lithium-ion battery. The aqueous solution of hydrogen peroxide and vanadium pentoxide are mixed and react to obtain vanadium pentoxide hydrogel; and the vanadium pentoxide hydrogel, diammonium hydrogen phosphate, lithium hydroxide monohydrate, sodium salt and polyethylene glycol serve as raw materials to synthetize the precursor of the positive pole material Li3-xNaxV2(PO4)3 of the lithium-ion battery in one step. The precursor is calcinated under the protection of inert gas atmosphere, so that V5+ is fully reduced into V3+, and simultaneously a product Li3-xNaxV2(PO4)3 is generated. The rheological phase method for preparing the sodium-doped positive pole material lithium vanadium phosphate of the lithium-ion battery is simple and convenient, easy to control and low in cost; the synthesis process is simplified, the sodium-doped lithium vanadium phosphate Li3V2(PO4)3 has a larger lithium-ion transportation channel, and the conductivity of the Li3V2(PO4)3 can be improved, so that the charging, discharging and rate capability of a sample is improved.

The invention relates to a POSS composite porous gel polymer electrode and an electrostatic spinning preparation method. The POSS composite porous gel polymer electrolyte is characterized by being prepared from the following raw material components: 1 part by weight of POSS hybrid materials, 4 to 20 parts by weight of polymer matrix and 16 to 230 parts by weight of polymer solvent. A preparation method of the gel polymer electrolyte adopts the electrostatic spinning preparation method. The POSS hybrid material is a copolymer of chloropropyl POSS (POSS-(C3H6Cl)8) and eight-armed planetary POSS polymer (POSS-(PMMA)8). The POSS composite porous electrolyte has high liquid absorption rate, and the introduced POSS hybrid material can improve the heat mechanical performance of a diaphragm and the ion transportation performance of the gel polymer electrolyte. By adopting the POSS composite porous gel polymer electrode, the requirement on the ion conductivity can be met.

The invention belongs to the technical field of battery cathode material preparation and discloses a SiO2@C core-shell compound physical lithium ion battery cathode material and a preparation method thereof. The preparation method includes: using rice husks as the raw materials, crushing carbon blocks of carbonized rice husks through a high-energy ball milling method by utilizing the features of the organic carbon of the rice husks and SiO2 and the template structure naturally formed between the organic carbon of the rice husks and the SiO2, and dispersing agglomerated SiO2 nano particles; evenly wrapping the surfaces of the dispersed SiO2 nano particles with the crushed carbon powder to finally form a SiO2@C core-shell compound with an interconnected network structure. The SiO2 in the SiO2@C core-shell compound is evenly wrapped with C, the SiO2 and the C infiltrate each other to form the interconnected network structure, and the structural integrity is beneficial to charge diffusion and fast ion transportation. The SiO2@C core-shell compound physical lithium ion battery cathode material is low in cost and excellent in electrochemical performance, and the preparation method is hopefully applicable to large-scale industrial production.

The invention discloses a porphyrin memristor with a biological synapse analogue function, a preparation method and application thereof. The structure of the device of the porphyrin memristor with thebiological synapse analogue function comprises a metal cathode, a resistive layer and ITO conducting glass from top to bottom in sequence; the resistive layer comprises a modified layer and a dielectric layer, and the dielectric layer is a porphyrin layer. According to the porphyrin memristor with the biological synapse analogue function, the organic memristor belongs to a typical ion transportation mechanism, the porphyrin memristor has the characteristic of biological synapse analogue function and has the advantages of large area, low cost, flexible manufacturing and the like, the structureof the whole memristor is easy to design, the technology is simple, the performance is stable, and the resistance change of the porphyrin memristor is of high similarity corresponding to the synapseof a human brain, so that the research of a synapse bionic device based on the memristor must bring new thought for the field of artificial intelligence, and the development of artificial intelligencedevices is promoted more accurately.

The invention relates to a Fe-Co-S nanosheet material and a preparation method thereof and application. The preparation method comprises steps: S1, soluble cobalt salt, soluble iron salt, urea and ammonium fluoride are dissolved in water, thiourea is added after even stirring, and a hydrothermal reaction is conducted; and S2, after the hydrothermal reaction is finished, cooling, centrifuging, washing and drying are carried out to obtain the Fe-Co-S nanosheet material. Compared with the prior art, the Fe-Co-S nanosheet material is synthesized through one-step hydrothermal synthesis, the material has a porous nano structure with a high effective specific surface area, more electrochemical active sites and a rapid ion transport path can be provided, the preparation method of the material is simple and environmentally friendly, the synthesis time is greatly shortened, and large-scale production of Fe-Co-S nanosheet materials is facilitated.

The invention particularly relates to a method for separating a cotton guard cell protoplast. The method comprises the following steps: inducing germination of cotton seeds, carrying out enzymolysis and separation on the guard cell protoplast, centrifuging and the like. According to the method for separating the cotton guard cell protoplast provided by the invention, guard cells of cotton leaves are processed by adopting a one-step enzymolysis approach. Compared with a two-step enzymolysis approach, the experimental period is greatly shortened, the experimental operation process is simplified, the experiment efficiency is improved, high physical activity of the protoplast is kept, the problem of separation of the cotton guard cell protoplast is solved, and a good experimental foundation is provided for research of guard cell permeability, ion transportation and the mechanism of stomatal movement by successful separation of the cotton guard cell protoplast.

The invention relates to space microbacterium oxydans LCT-H6, in particular to a space microorganism which is obtained through separation of condensed water in a 'Shenzhou 9' spacecraft return capsule with a space technology. The space microbacterium oxydans LCT-H6 is characterized in that microbacterium oxydans LCT-H6 is an aerobic gram-positive bacterium, has the closest genetic relationship with microbacterium maritypicum, and the space microbacterium oxydans LCT-H6 has corrosion capability for four polymer materials including epoxy resin, ester type polyurethane, ether type polyurethane and vulcanized natural rubber. The space microbacterium oxydans LCT-H6 is clarified on the level of genomics, the total length of a whole genome sequence of LCT-H6 proves to be 4.11 Mbp, the content of GC is 67.65%, protein of the space microbacterium oxydans LCT-H6 is classified and noted as the class-22 COG family, and COG containing a largest amount of protein has functions on 'energy generation and conversion', 'amino acid transportation and metabolism', 'sugar transportation and metabolism', 'inorganic salt ion transportation and metabolism' as well as 'translation, ribosome structure and forming'.

The invention relates to a positive electrode material for a lithium-ion battery and a preparation method and application thereof. According to the positive electrode material, a CNT is taken as a core and the CNT core is coated with an LMP to form an LMP/CNT core-shell material; and a PEO film also coats the surface of the LMP/CNT core-shell material, wherein the mass percent of the CNT in the LMP/CNT core-shell material is 1-10%; and the mass percent of the PEO film on the positive electrode material is 0.5-5%. After the LMP/CNT core-shell material is coated with the PEO film, tight contact of the LMP and the CNT is promoted, the targets of further improving the conductivity of the material and shortening the ion transport distance are achieved, direct contact of the LMP and an electrolyte can be prevented, manganese ions are prevented from being dissolved into the electrolyte and the capacity attenuation rate is reduced. When the positive electrode material is applied to the lithium-ion battery, the rate capability and the cycle performance of the lithium-ion battery can be greatly improved.

The invention relates to a nano-granular Mn3O4/Super P lithium ion battery negative electrode material and a preparation method therefor. Potassium permanganate, tetrahydrate manganese chloride and Super P are taken as raw materials; manganese dioxide is prepared by adopting a low temperature coprecipitation method firstly; then manganese dioxide is mixed with Super P to be subjected to thermal treatment to obtain a nano-granular Mn3O4/Super P (MS) compound; and the compound can be used as the high-performance lithium ion battery negative electrode material. The MS nanoparticles have relatively large specific surface areas and can be in full contact with an electrolyte, so that the activity injection site of the material can be greatly improved; meanwhile, the diffusion distance of lithium ions in the material is shortened, ion transport is accelerated, and the material obtains high specific capacity; and in addition, the granular nanostructure can effectively relieve structural expansion/shrinkage in ion intercalation/deintercalation, so that high cycling stability of the MS particles is realized.

The invention relates to a preparation method of a spherical lithium-ion secondary battery cathode material vanadium phosphate monohydrate. The spherical lithium-ion secondary battery cathode material VPO4.H2O is prepared by a hydrothermal method. The preparation method has the advantages of being mild in reaction condition, high in product purity, good in crystallinity, uniform in particle size distribution and free of an agglomeration phenomenon; the average particle sizes of the particles are 1.5-3 microns; the prepared cathode material is regular spherical particles, and has relatively high specific surface area in structure; sufficient moistening of electrolyte is facilitated; lithium ion transportation in the cathode material is facilitated in the charging and discharging processes; and the spherical lithium-ion secondary battery cathode material VPO4.H2O synthesized by the method shows good electrochemical properties.

The invention discloses a mass spectrometry method comprising the steps that positive ions and negative ions which are released by an ion source are received; and the positive ions and the negative ions are separated and introduced into different ion transportation channels and fed into a mass analyzer through different ion transportation channels. The invention provides another mass spectrometry method comprising the steps that the positive ions, the negative ions and unionized material which are released by the ion source are received; the positive ions and the negative ions are separated; and the unionized material is ionized and then fed into the mass analyzer, wherein the positive ions, the negative ions and the unionized material are generated under atmospheric pressure. The invention also provides a mass spectrometry device with an atmospheric pressure interface based on the method.