15 results about "Ionic conductance" patented technology

The present application relates to a kind of porous gel electrolyte membrane based on polyvinylidene fluoride and its preparation method, belong to polymer gel electrolyte field.The porous gel electrolyte membrane includes gel electrolyte matrix, inorganic ceramic nano filler, lithium salt electrolyte and lithium salt auxiliary agent.Using phase inversion solidification method, the uniform porous structure is obtained, the adsorption and storage capacity of porous gel electrolyte membrane to electrolyte are improved;Using inorganic ceramic nano filler with high ionic conductance, the ionic conductance and mechanical strength of porous gel electrolyte membrane are enhanced;Using lithium salt added during preparation, the dehydrofluorination reaction of PVdF is inhibited, the stability of slurry is ensured, and by inducing the transition of PVdF matrix from alpha phase to beta phase, the uniform deposition of Li ion is promoted, so as to improve the cycle stability of battery.The preparation method of the present application is simple, easy to control, green and environmentally friendly, can significantly improve the ion transport kinetics and electrochemical stability of lithium ion battery.

The application provides a kind of composite solid electrolyte particles and its preparation method and application, the composite solid electrolyte particles are core-shell structure, the core layer of the core-shell structure includes inorganic solid electrolyte, the shell layer of the core-shell structure includes organic component, with the inorganic solid electrolyte as core layer, the organic component is coated on its outside as shell layer, can be comprehensive inorganic solid electrolyte and organic component both sides of advantage, reach the effect of playing to one's strengths and avoiding one's weaknesses, so that the composite solid electrolyte particles obtained simultaneously have higher mechanical properties, higher stability and higher ionic conductance characteristics, applied in solid-state battery helps to improve the interface problem between electrolyte and positive and negative electrode in the solid-state battery, and then helps to improve the electrical properties and safety performance of the solid-state battery.

The application discloses a preparation method and application of an oxygen vacancy Li2ZrO3 material and belongs to the field of lithium ion batteries. The oxygen vacancy Li2ZrO3 with uniform structure and high ionic conductivity is successfully prepared by using seaweed fiber, hydrochloric acid, ethanol, zirconium chloride, lithium carbonate and sodium borohydride as raw materials. The seaweed fiber is used as a template, so that the defect of excessively large crystal particle size caused by the traditional solid-phase sintering method is avoided to a certain extent; and the oxygen vacancy is manufactured in a certain concentration of sodium borohydride aqueous solution without changing the structure, so that the operation is simple and practical, and the product is controllable.

This invention discloses a composite solid-state electrolyte, its preparation method, and a battery. The composite solid-state electrolyte comprises a polymer matrix, a sulfide ceramic filler, a main lithium salt, and a nitrile-based lithium salt additive. The nitrile-based lithium salt additive forms an interfacial passivation layer on the surface of the sulfide ceramic filler to suppress interfacial side reactions between the sulfide ceramic filler and the polymer matrix and / or the main lithium salt. This invention maintains the structural integrity of the sulfide ceramic filler, preserving its inherent high ionic conductivity channels, while reducing the interfacial impedance between the organic and inorganic phases, thereby improving the ionic conductivity and interfacial stability of the composite solid-state electrolyte.

This invention provides a multifunctional halide material, its preparation method, and its application; the multifunctional halide material includes at least one of the following: (I) Li 2‑x M 1‑x A x Cl4;(II) Li 2‑x M' 1‑ x A x Cl4;(II)Li 2‑x M'' 1‑x A x Cl 4‑3x E 3x The multifunctional halide material of this invention possesses both high ionic conductivity and partially reversible delithiation capability, providing additional lithium ions to achieve a lithium replenishment effect.

This invention belongs to the field of battery technology, specifically relating to a dual-network gel electrolyte, its preparation method, and its application. The raw materials of the dual-network gel electrolyte include a first polymer, a second polymer, a metal salt, a plasticizer, a crosslinking agent, and a solvent. The first polymer forms a flexible first network through chemical crosslinking, serving as the main channel for ion transport to ensure high ionic conductivity. Simultaneously, the second polymer is introduced, interpenetrating with the first network through physical or chemical interactions to form a second network. This structure, through synergistic action, preferentially causes reversible damage to the second network to dissipate energy when subjected to external forces (such as zinc dendrite growth stress), thereby protecting the integrity of the main chain structure and ion channels of the first network. Ultimately, the gel achieves excellent mechanical properties such as high toughness and puncture resistance while maintaining high ionic conductivity and excellent capacity retention, solving the problem of mutual constraint between the two in traditional solutions.

A method of preparing an ionic liquid includes the following steps. The halogen-containing compound is reacted with the first compound to form a second compound. The halogen-containing compound includes a halocarbon, a sulfonyl halide, or a combination thereof. The first compound comprises an amine compound with a tertiary amino group, a phosphine compound or a combination of the amine compound and the phosphine compound. The second compound includes a first quaternary ammonium salt, a first quaternary phosphonium salt, or a combination thereof. The second compound is reacted with a lithium salt in a microwave device to form a third compound. The third compound includes a second quaternary ammonium salt, a second quaternary phosphonium salt, or a combination thereof. The anions of the second compound and the third compound are different. The microwave power of the microwave device ranges from 700 watts to 1400 watts. The preparation of the ionic liquid in the microwave device can reduce the time for preparing the ionic liquid. According to the preparation method disclosed by the invention, the ionic liquid with low water content, high ionic conductivity, low viscosity and wide electrochemical stability window can be prepared.

The invention discloses a high-specific-energy and high-power battery electrode compound material, an electrode, a device, a preparation method and application. The positive electrode compound material comprises a positive electrode active material, a high-ionic-conductivity solid electrolyte and a high-electron-conductivity additive; the positive electrode active material comprises two or more of an active material A, an active material B and an active material C; the maximum multiplying power of the active material A, the maximum multiplying power of the active material B and the maximum multiplying power of the active material C are smaller than or equal to 2C, larger than 2C and smaller than or equal to 5C and larger than 5C respectively; the negative electrode compound material comprises a negative electrode active material, a high-ionic-conductivity solid electrolyte and a high-electron-conductivity additive; the negative electrode active material comprises two or more of an active material D, an active material E, an active material F and an active material G; the energy storage mechanisms of the active materials D, E, F and G are respectively an alloy type, a conversion type or a conversion-alloy type, a high-pressure embedded type and a low-pressure embedded type. The energy density and the power density of the battery device are remarkably improved, and the battery device has good cycling stability.

This invention discloses an ultraviolet photoelectric sensor based on capillary boundary ion transport, its fabrication method, and its application, belonging to the field of photoelectric sensor technology. The photoelectric sensor includes a wide-bandgap semiconductor substrate with capillary boundaries, a porous water-storing material, and electrodes composed of non-polarized electrodes. The porous water-storing material provides a water source for the capillary boundaries. The capillary boundaries of the substrate possess ionic conductivity due to the surface tension of the water filling the capillary boundaries. The non-polarized electrodes can rapidly convert ion current into detectable electron current. The ultraviolet photoelectric sensor provided by this invention utilizes the ionic conductivity of the ion channels formed by the capillary boundaries and the temperature change caused by the absorption of ultraviolet light by the wide-bandgap semiconductor to achieve the detection of ultraviolet light.

The invention provides an artificial SEI coated negative electrode as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a solution of a composite organic monomer with a catalyst and graphite, carrying out solvothermal reaction, and drying to obtain the artificial SEI coated negative electrode, the composite organic monomer comprises a first organic monomer and a second organic monomer, and the covalent organic polymer coating layer has a polar functional group and an anion acceptor functional group. According to the invention, small-molecule organic monomers are subjected to a polymerization reaction, an artificial SEI-covalent organic polymer is generated on the surface of graphite in situ, functional groups are modified, a polar functional group is utilized to reduce a desolvation energy barrier, an anion acceptor functional group is cooperated to regulate and control a solvation structure and promote lithium salt dissociation, and the dynamic performance and ionic conductance are improved; the negative electrode is prevented from being stripped and cracked due to volume expansion; the artificial SEI prepared by the method is good in structural uniformity and relatively strong in binding force with graphite, and the rate capability and the cycle performance of a negative electrode can be remarkably improved.

The application discloses a kind of composite solid electrolyte film and its preparation method and application, the film is obtained by using electrospinning, electrostatic transfer printing, hot roller and polymer infiltration process preparation ultra-thin high ionic conductance composite solid electrolyte film.In which, electrospinning and hot roller guarantee the uniformity of solid electrolyte film, while effectively reducing the thickness of film;Electrostatic transfer printing and hot roller operation combined way makes inorganic particles uniformly distributed in electrolyte film, improves the mechanical strength of composite electrolyte film, while in electrolyte film contact forms ion transmission path, so that polymer film has high ionic conductance;Infiltration in film self-repairing elastic ion-conducting polymer fills the pore in film, has effective adhesion to ceramic particles, while improving the mechanical properties and ion-conducting property of electrolyte film.

This invention discloses a method for preparing a surface-passivated, highly stable sulfide electrolyte, comprising the following steps: S1: depositing an ion-conductive seed layer on the surface of sulfide electrolyte particles in an inert atmosphere; S2: coating the surface of the sulfide electrolyte particles with a dynamic passivation layer to obtain coated particles; the dynamic passivation layer forms an ion-conductive polymer layer with a gradient concentration by in-situ initiating a polymerization reaction of monomers containing reversible cross-linked structures on the seed layer, wherein the gradient concentration refers to the continuous increase of the molar fraction of ion-conductive groups along the layer thickness direction; S3: obtaining a surface-passivated, highly stable sulfide electrolyte through spheroidization post-treatment. The preparation method of this invention not only achieves physical-chemical dual shielding against moisture / air erosion, but also endows the particles with self-healing capabilities while simultaneously ensuring high ion conductivity and high mechanical toughness, meeting the stringent requirements of high energy density and long-life all-solid-state batteries.

The application discloses a kind of electrolyte preparation methods suitable for manganese zinc secondary battery, comprising the following steps: solvent premixing, deionized water, ACN, Py, DTA, EG are sequentially added and stirred;Batch dissolving salt, Zn (OTF) 2 is added in batches into reaction kettle, and clear transparent solution is obtained after dissolving;Surfactant cooperation, CTAB suspension is added into solution and stirred;Vacuum degassing, dissolved oxygen and trace volatile components in solution are removed by vacuum;Impurity is removed by filtering, the solution is filtered to meet metal ion impurities≤1ppm, and high reversibility electrolyte is obtained.The electrolyte can realize nearly 100% Zn plating / stripping coulomb efficiency without sacrificing safety and cost, and has no dendritic deposition, MnO2 positive electrode 1500 cycles or more high reversible capacity, effectively inhibits hydrogen evolution reaction and electrolyte dry, maintains low temperature long-term stable operation, and has low viscosity, high ionic conductivity and non-flammable characteristics.

This application provides a negative electrode sheet, its preparation method, and its application. The negative electrode sheet includes a current collector and a negative electrode active layer disposed on the surface of the current collector. The negative electrode active layer includes negative electrode active material particles and a modified inorganic ionic conductor. The modified inorganic ionic conductor includes an inorganic ionic conductor body and a carbon coating layer covering the surface of the inorganic ionic conductor body. The modified inorganic ionic conductor includes one or more of one-dimensional modified inorganic ionic conductor nanowires and two-dimensional modified inorganic ionic conductor nanosheets. The ionic conductivity of the negative electrode active layer gradually increases along the direction from the current collector to the negative electrode active layer. This negative electrode sheet possesses excellent ionic conductivity, electronic conductivity, and high energy density.

The application discloses an electrolyte film, a preparation method thereof and a solid-state battery. The electrolyte film has a three-layer stacked structure, comprising: a positive electrode stable layer doped with an F element in a host material; a fast ion conductive layer doped with an O element in the host material; and a negative electrode stable layer doped with an N element in the host material; wherein the fast ion conductive layer is located between the positive electrode stable layer and the negative electrode stable layer; and the host materials of the positive electrode stable layer, the fast ion conductive layer and the negative electrode stable layer are the same solid-state halide electrolyte. The application uses the same solid-state halide electrolyte as the host material, constructs a three-layer stacked structure of a positive electrode stable layer-fast ion conductive layer-negative electrode stable layer through layered doping of different elements (F, O and N), uses the same host material, can effectively inhibit side reactions between electrolyte layers and maintain good contact, and realizes performance complementation through functionalized doping of each layer, and both high ion conductivity and a wide electrochemical window are considered.