521results about How to "High ion conductivity" patented technology

The invention provides a polymer porous membrane, a preparation method of the polymer porous membrane, a polymer electrolyte, a polymer battery and a preparation method of the polymer battery. A carbon material is dispersed in the polymer porous membrane, so that the degree of crystallization of a polymer which constitutes the polymer porous membrane is lowered and the liquid absorption of the polymer porous membrane is increased; the liquid absorption rate, liquid holding capability and ionic conductivity of the polymer porous membrane are increased; interface impedance is reduced, battery magnification discharging performance and the circulating performance of the battery are enhanced; simultaneously, the battery prepared by the method has excellent high temperature circulation and storage performance and low expansion ratio at a high temperature and further meets the development requirement of the polymer battery. Simultaneously, the preparation method is simple and is easy to implement and the prepared battery has high performance.

The invention relates to an all-solid state electrochromic device preparation method and prepared electrochromic glass, and solves the technical problems of complicated process, low yield and the like in existing electrochromic device preparation. A bottom transparent conducting layer, a lower pole electrochromic layer, an upper pole electrochromic layer and a top transparent conducting layer are sequentially deposited and grown on a transparent substrate, the upper pole electrochromic layer is directly deposited and grown on the lower pole electrochromic layer, an ion source is deposited on the upper pole electrochromic layer, the top transparent conducting layer is deposited and grown after the ion source is deposited, and finally, the device is prepared by heat treatment or optical treatment. Compared with traditional preparation technology, growth of an ion conduction layer is omitted, the technological process is simplified, yield is improved, and cost is reduced.

Disclosed is an electrode comprising a first organic/inorganic composite porous coating layer formed on its surface, wherein the first coating layer includes inorganic particles and a binder polymer for interconnecting and fixing the inorganic particles, and has micropores formed by interstitial volumes among the inorganic particles. An electrochemical device including the same electrode is also disclosed. Further, disclosed is a method for manufacturing an electrode having an organic/inorganic composite porous coating layer on the surface thereof, comprising the steps of: (a) coating a current collector with slurry containing an electrode active material and drying it to provide an electrode; and (b) coating the surface of electrode obtained from step (a) with a mixture of inorganic particles with a binder polymer. A lithium secondary battery including the electrode shows improved safety and minimized degradation in battery performance.

Disclosed is use of a porous membrane and a composite membrane thereof in a redox flow batteries, and in particular the use thereof in a vanadium redox flow battery. The membrane can effectively realize the separation of ions with different valence states, and an ion transfer without any ion exchange group. The pore size and structure of the porous membrane can be controlled by filling an inorganic substance or grafting an ion exchange group in the pore, in order to improve the barrier properties of the porous membrane for vanadium ions and to increase proton conductivity.

An object of the present invention is to provide a cathode active material which contains small-particle sized and low-crystalline lithium transition metal silicate and which undergoes charge-discharge reaction at room temperature.

The cathode active material for a non-aqueous electrolyte secondary battery is characterized by containing a lithium transition metal silicate and exhibits diffraction peaks having half widths of 0.175 to 0.6°, the peaks observed through powder X-ray diffractometry within a 2θ range of 5 to 50°.

In a Li ion conductivity oxide solid electrolyte containing lithium, lanthanum, and zirconium, a part of oxygen is substituted by an element M (M=N, Cl, S, Se, or Te) having smaller electronegativity than oxygen.

The present invention is a heat-resistant film comprising at least any one of a polybenzazole, aramid and polyamideimide produced by introducing a thin film made by a roll, slit or press from a polymer solution sandwiched between at least two supports into a coagulating bath and peeling the supports off in the coagulating bath to effect the coagulation, and a composite ion-exchange membrane having a surface layer consisting of an ion-exchange resin excluding a porous film on the both side of a composite layer formed by impregnating said film with the ion-exchange resin. A heat-resistant film having a combination of excellent heat resistance, mechanical strength, smoothness and interlaminar peeling resistance, especially a microporous heat-resistant film, and a composite ion-exchange membrane employing the same which has an excellent ion conductivity are provided.

The invention provides a composite solid polymer electrolyte and a preparation method thereof. The polymer electrolyte comprises a high-molecular polymer, carbon quantum dots and an organic lithium salt or organic sodium salt, wherein the high-molecular polymer is selected from one of polyoxyethylene, polyacrylonitrile or polymethyl methacrylate and the like. The preparation method comprises the steps of preparing the carbon quantum dots from organic ketone or organic aldehyde as a raw material and then compounding the carbon quantum dots and high-molecular polymer matrix and the organic lithium/ sodium salt. By the composite solid polymer electrolyte, a crystal phase of the polymer matrix in the electrolyte can be effectively reduced, the dissociation rate of the lithium/sodium salt is improved, and the electrochemical properties of the ionic conductivity and the like of the polymer electrolyte are significantly improved.

The invention discloses a composite solid electrolyte material and a preparation method and application thereof. The composite solid electrolyte material is composed of a conducting ion polymer, a metal-organic framework material and an alkali metal or alkaline earth metal salt. The metal-organic framework material includes MOF-235, MIL-68, MIL-88. MIL-96 and other series. The metal-organic framework material has a special topological structure. The addition of the solid electrolyte material can effectively reduce the crystallinity of the polymer electrolyte, promote the dissociation of the alkali metal or alkaline earth metal salt, the obtained composite solid electrolyte has good ionic conductivity and electrochemical stability in a wide temperature range (25-120 DEG C) and also has goodflexibility and film thinning, and the preparation method is simple and scale production is feasible. The composite solid electrolyte can be matched with different types of positive electrode materials and alkali metal or alkaline earth metal negative electrode, and the assembled all-solid-state battery can present good electrochemical performance at the above-mentioned temperature.

The present invention provides a molten salt containing at least two salts, and having a melting point of 350° C. or more and 430° C. or less and an electric conductivity at 500° C. of 2.2 S/cm or more. The present invention also provides a thermal battery including the molten salt as an electrolyte.

The invention discloses a polyolefin battery isolation membrane after lfonation modifying, wherein the weight ratios of raw material of the invention are: 60 to 90 percent of polyethylene or polypropylene fiber, graft monument acrylic acid, meth-acrylic acid, 2 to 10 percent of propylene peptide amine or meth-acrylic peptide amine, 5 to 15 percent of enhanced fiber, 1 to 10 percent of sulfonation agent. The polyolefin after lfonation modifying has good hydrophilicity, strong preserving liquid ability, high alkali uptake rate, good chemical stability and strong anti-oxidation property after washing, and can improve electrical property of nickel battery significantly.

An electrochemical device having an anode electrode, a cathode electrode, and an electrolyte. At least one of the anode electrode and the cathode electrode is provided with a substantially uniform superficial relief pattern formed by a plurality of substantially uniform projections and has an electrical conductivity gradient between peaks of the projections and valleys between the projections

For overcoming the problem of degradation of lithium battery performance caused by high probability of oxidization of an electrolyte of a high voltage lithium battery in the prior art, the invention provides a high voltage lithium battery cell. The high voltage lithium battery cell comprises a positive electrode, a negative electrode and an electrolyte positioned between the positive electrode and the negative electrode; the electrolyte comprises an inorganic electrolyte layer and a polymer electrolyte layer positioned on the surface of the inorganic electrolyte layer; the inorganic electrolyte layer is positioned on the surface of the positive electrode; and the polymer electrolyte layer is positioned on the surface of the negative electrode. Meanwhile, the invention also discloses a preparation method for the high voltage lithium battery cell and a lithium ion battery adopting the high voltage lithium battery cell. The high voltage lithium battery cell provided by the invention can overcome a large amount of negative problems caused by oxidization of the electrolyte, and the safety performance and the cycling performance of the lithium battery can be improved.

The purpose of the present invention is to provide a solid electrolyte which can prevent the penetration of dendrites of electrode components, and has high ion conductivity, and to provide a secondary battery using the electrolyte. A solid electrolyte according to the present invention is sheet-shaped, is formed from an oxide sintered body, and comprises: a layer-shaped compact section having a sintered density of 90% or more; and a porous section which is formed so as to connect with at least one surface of the compact section on the surface-side of the solid electrolyte, and which has a porosity of at least 50%. A secondary battery according to the present invention comprises the solid electrolyte, and a positive electrode and a negative electrode which are arranged at corresponding positions sandwiching the solid electrolyte. Also, a secondary battery according to the present invention comprises: a separator comprising solid electrolyte; the positive electrode and negative electrode which are arranged at corresponding positions sandwiching the separator; and electrolyte solution which is filled in the negative electrode-side where the negative electrode is disposed and/or the positive electrode-side where the positive electrode is disposed, sandwiching the separator.

The invention provides a garnet-type Li-ion conductive oxide, that is, Li7La3Zr2O12, and the garnet-type Li-ion conductive oxide has relatively high sintered density and high ionic conductivity. The garnet-type Li-ion conductive oxide is formed by Li, La, Zr, and O. The garnet-type Li-ion conductive oxide is characterized by containing at least one element respresented by M1, M2, M3, and M4. The M1, M2, M3, and M4 represent the following elements. M 1 is more than one element selected from of Mg, Ca, Sr, Ba, and Zn. M2 is more than one element selected from Al, Ga, Co, Fe, and Y. M3 is more than one element selected from Sn and Ge. M4 is more than one element selected from Ta and Nb.

The invention discloses a preparation method for a double quaternary ammonium side long chain anion-exchange membrane. The preparation method is characterized in that a dual-functional monomer with both tertiary amine group and quaternary ammonium group performs nucleophilic substitution on the main polymer chain with live benzyl bromine, benzyl chloride or chlorine acyl group, so as to obtain the double quaternary ammonium side long chain anion-exchange membrane. The raw materials are cheap and are easy to obtain, the preparation method is simple and is applicable to large scale industrial production, and the prepared anion-exchange membrane has the advantages of high ion conductivity, long service life, excellent mechanical property, and good solubility.

The invention provides a preparation method of an electrospun composite membrane for a lithium ion battery, and relates to lithium ion batteries. The invention provides the preparation method of the electrospun composite membrane which is higher in ionic conductivity, better in electrochemical properties and smaller in thickness for the lithium ion battery. The preparation method comprises: preparing a precursor solution A for compounding polyvinylidene fluoride and another polymer; preparing a precursor solution B for mixing the polyvinylidene fluoride and inorganic nano-material; and adopting an electrospinning technology to obtain the electrospun composite membrane for the lithium ion battery. According to the preparation method provided by the invention, PVDF is adopted as a substrate; a porous mesh-shaped composite fiber membrane is produced by using the electrospinning technology, a polymer blend and the inorganic nano-material; and a crystallinity of a PVDF system is reduced, thus improving ion conductivity, tensile strength and breaking elongation of an amorphous area of the membrane, ensuring ionic conductivity and safety performance of the lithium ion battery with a higher electrolyte, and obtaining fiber membranes different in thickness. Therefore, application needs of the lithium ion battery membrane are met.

A battery capable of improving ionic conduction is provided. The battery includes a cathode, an anode, and a solid electrolyte layer. One or more of the cathode, the anode, and the solid electrolyte layer includes a solid electrolyte binder.

The invention relates to a sulfonated polymer applied to a lithium battery electrode as a binder as well as a method for preparing the lithium battery electrode. The sulfonated polymer is used as the binder in electrode slurry of the lithium battery electrode, the obtained lithium battery electrode is used for assembling a lithium battery, and the lithium battery is relatively long in charging-discharge cycle life and stable in work under a relatively high current density. The sulfonated polymer with a sulfonic acid group has excellent capacity of transferring lithium ions, so that the lithium ions can be rapidly transmitted back and forth between an electrode active material and an electrolyte, and the lithium battery which is stable to run under the rapid charging-discharging condition can be obtained. The sulfonated polymer which is used as the binder is sufficient in cohesion force and binding strength, and the electrode active material and a conductive medium are stuck onto a current collector by the sulfonated polymer and are unlikely to fracture and dust, so that the lithium battery has sufficient capacity and cycle performance as well as excellent rate capacity.

A multilayer porous membrane comprising a porous membrane containing a polyolefin resin as a main component; and a porous layer containing an inorganic filler and a resin binder and laminated on at least one surface of the porous membrane; wherein the porous membrane has an average pore size d=0.035 to 0.060 μm, a tortuosity τ_a=1.1 to 1.7, and the number B of pores=100 to 500 pores/μm², which are calculated by a gas-liquid method, and the porous membrane has a membrane thickness L=5 to 22 μm.

The invention provides a ceramic diaphragm taking aerogel as a powder body, and applications of the ceramic diaphragm in a lithium ion battery, relating to a lithium ion battery diaphragm. The ceramic diaphragm takes aerogel as the ceramic powder body which is coated on the diaphragm to form a ceramic diaphragm. The ceramic diaphragm taking aerogel as the powder body can be applied to batteries. The batteries include non-aqueous electrolyte secondary batteries and the like; each battery comprises an anode material, a cathode material and a ceramic diaphragm taking aerogel as a powder body, and the ceramic diaphragm taking aerogel as a powder body is arranged between the anode material and the cathode material. Aerogel is a lightweight nanometer mesoporous noncrystaline material formed by crosslinking of atom clusters, the porosity is up to 80%, the specific surface area is up to 800-1000m<2>/g, the aerogel has the characteristics of being excellent in transparency, extremely low heat conductivity, resistant to high temperature, low in density and the like. The ceramic diaphragm can be used as a highly safety diaphragm material of secondary batteries such as lithium ion batteries, and has excellent thermal stability and electrochemical performances.

The invention relates to a solidified composite electrolyte and a preparation method thereof, and belongs to the technical field of lithium secondary battery electrolytes. The electrolyte is a gel composite electrolyte, and is formed by compounding a porous inorganic electrolyte network with an ionic liquid; and the electrolyte is the in-situ gel composite electrolyte formed by limiting an ionic liquid by a porous inorganic electrolyte network in situ or an ex-situ adsorption-type gel composite electrolyte formed by limiting an ionic liquid by a porous inorganic electrolyte network ex situ. The method adopts an ionic liquid to assist a sol-gel method, and the in-situ gel composite electrolyte, an all-solid-state electrolyte or the ex-situ adsorption-type gel composite electrolyte can be prepared in the different steps of one method. The electrolyte is in a porous network structure and a nano-particle size, represents high ionic conductivity, wide electrochemical stability window, good heat stability, chemical stability and mechanical strength, good film-forming property, and is easy to process and form; and the method is simple, low in consumption, energy-saving, green and environment-friendly.

The invention discloses a preparation method of a coated ternary nickel-cobalt-manganese lithium oxide positive electrode material. The preparation method comprises the following steps of (1) preparing a ternary nickel-cobalt-manganese lithium precursor; (2) preparing an oxide-coated ternary nickel-cobalt-manganese lithium precursor; and (3) preparing an ion conductor oxide-coated ternary nickel-cobalt-manganese lithium positive electrode material. By the preparation method of the positive electrode material, a lithium ion is easy to de-intercalate from a surface layer of the material, and thehigh-temperature circulation performance of the material is improved; a coating layer does not react with an electrolyte, interface side reaction caused by contact of the main body material and the electrolyte is reduced, and the safety of the material is improved; the processing performance of a pole plate during the uniform coating process is improved, and the high-temperature circulation performance of the material after being assembled into a battery is improved; and the prepared positive electrode material does not need to be subjected to a roasting process for two times, the energy consumption is reduced, and the cost is reduced.