318 results about "Solid-state lithium-ion battery" patented technology

The invention discloses an all-solid-state lithium ion battery and a preparation method thereof. The all-solid-state lithium ion battery is prepared by an ink-jet printing technology; different components are dissolved into a solvent to prepare slurry; the slurry is put into different ink boxes; designing is carried out by computer program; electrodes and electrolyte are longitudinally printed in a stepwise gradient manner; the electrolyte longitudinally changes in electrode plates in a gradient manner; the interface impedance of an electrode active material/electrolyte can be reduced by the gradient structure distribution of the electrolyte in the electrode plates; deep conduction of lithium ions is facilitated; the capacity property of the active material is put into the greatest play; and other parts, except for a current collector, of the all-solid-state lithium ion battery structure prepared by ink-jet printing form an overall lamination structure. Various components in the lamination structure are in tight contact and regular arrangement, so that the interface impedance is much lower than that of the all-solid-state lithium ion battery which is prepared in a mechanical superposition manner; and the ink-jet printing mode is convenient, fast and suitable for large-scale production.

The invention discloses a solid electrolyte membrane of a lithium ion battery, and relates to the field of lithium ion batteries. The solid electrolyte membrane is composed of a glass ceramic electrolyte and a coating layer with which the surface of the glass ceramic electrolyte is coated. The coating layer is prepared from lithium salt and a polymer material at the molar ratio of 1:5-1:10. The electrolyte membrane can reduce the interface impedance of the full-solid-state lithium ion battery to a great extent, so that the cycling stability of the full-solid-state lithium ion battery is improved, and the service life of the full-solid-state lithium ion battery is prolonged. The invention further discloses a preparation method of the solid electrolyte membrane and the full-solid-state lithium ion battery comprising the solid electrolyte membrane. The solid electrolyte membrane of the lithium ion battery is high in mechanical strength and excellent in electrochemical performance, and meanwhile the preparation technology is simple and convenient to popularize.

The invention relates to a preparation method for a composite positive electrode material used for a solid-state lithium ion battery. The preparation method comprises the following steps of i) performing uniform mixing on a solid-state electrolyte or a precursor thereof and a positive electrode active material or a precursor thereof to obtain mixture powder; and ii) performing high-temperature sintering on the mixture powder to obtain the powder-form composite positive electrode material which comprises the solid-state electrolyte and the positive electrode active material. By adoption of the preparation method for the composite positive electrode material provided by the invention, the interface resistance between the solid-state electrolyte and the positive electrode material can be lowered. When the composite positive electrode material, obtained by adopting the preparation method for the composite positive electrode material provided by the invention, is used for preparing the solid-state lithium ion battery, an electrode production line of the conventional liquid-state lithium ion battery can be not changed, so that equipment improvement cost used in improving the production line of the liquid-state lithium ion battery for preparation of the solid-state lithium ion battery can be greatly lowered.

A lithium-ion battery including an electrodeposited anode material having a micron-scale, three-dimensional porous foam structure separated from interpenetrating cathode material that fills the void space of the porous foam structure by a thin solid-state electrolyte which has been reductively polymerized onto the anode material in a uniform and pinhole free manner, which will significantly reduce the distance which the Li-ions are required to traverse upon the charge/discharge of the battery cell over other types of Li-ion cell designs, and a procedure for fabricating the battery are described. The interpenetrating three-dimensional structure of the cell will also provide larger energy densities than conventional solid-state Li-ion cells based on thin-film technologies. The electrodeposited anode may include an intermetallic composition effective for reversibly intercalating Li-ions.

The invention provides a solid-state lithium ion electrode, a solid-state lithium ion battery and a preparation method of the solid-state lithium ion electrode. The solid-state lithium ion battery electrode is composed of a metal current collector, and an active material, a conductive agent, solid electrolyte and a binder, which are attached on the current collector. During the electrode manufacture, the slurry containing the active material and the like is coated on the current collector, the method is suitable for continuous and batch production compared with a deposition method and a compression powder method.

The invention relates to preparation for a self-crosslinking compound solid electrolyte and an all-solid lithium ion battery composed of the self-crosslinking compound solid electrolyte and relates tothe field of the electrolyte of the lithium ion battery. Specifically, a compound solid electrolyte is prepared according to the following steps: adopting silane terminated polyether (MS) as a prepolymer and then stirring and uniformly mixing with inorganic nano-particles with acidity and alkalinity or organic polymer materials, conductive lithium salt and organic solvents, and preparing the compound solid electrolyte through the self-crosslinking curing of MS and inorganic nano-particles with acidity and alkalinity or organic polymer materials. The self-crosslinking compound curing of MS andinorganic nano-particles with acidity and alkalinity or organic polymer materials is capable of reducing the degree of crystallinity of the compound solid electrolyte, promoting the ionic conductivity, ion transference number, mechanical properties, electrochemical stability window and battery rate charge-discharge properties of the compound solid electrolyte and solving the problem of interfacecontact of the solid lithium ion battery. The ionic conductivity can reach up to 10<-4>Scm<-1>, the electrochemical window is above 5V, the shrinking rate of the product is low and the electrochemicalstability is high.

The invention provides an all-solid-state lithium ion battery with low interface impedance and high compatibility. The battery comprises a composite positive pole piece and a composite negative pole piece, wherein the composite positive plate and the composite negative plate are a mixture of an active substance and solid electrolyte with a certain concentration gradient, the concentration gradientis that the concentration of the active substance is gradually reduced from a current collector to the outside, the solid electrolyte is gradually increased, and the outermost layer is only a solid electrolyte layer. In order to achieve interfacial compatibility of the positive and negative composite pole pieces, a surface of the outermost solid electrolyte layer of the composite pole piece is designed into a concave-convex groove, and the concave-convex surface is coated with low-melting polymer solid electrolyte; and lastly, the composite positive pole piece and the composite negative polepiece are tightly combined in a hot-pressing manner to assemble the battery. The battery can effectively solve a problem of compatibility between an electrode material and an electrolyte layer and a problem of large interface impedance of a solid-state battery, and thereby the cycling stability of the solid-state battery is improved.

The invention discloses a high-safety all-solid-state lithium ion battery which comprises solid electrolyte, a positive plate and a negative plate, wherein the positive plate and the negative plate are overlapped with each other; the solid electrolyte is arranged between the positive plate and the negative plate adjacent to each other; the solid electrolyte is formed by mixing Li1+aAaSibO4 (A is one of Al, Mn, Ni and Ti, a is more than 1 and less than 2, and b is less than or equal to 2), an adhesive and a solvent according to a ratio of t:h:(1-t-h), wherein t is 30-55 percent, and h is 5-17 percent. The original combustible electrolyte and diaphragm are replaced by the noncombustible solid electrolyte, so that the risk that the battery is on fire is effectively reduced. When the solid electrolyte is in a slurry state, the battery is assembled, good contact between the solid electrolyte and a pole piece can be guaranteed, and ion diffusion impedance is reduced. The invention also discloses a method for producing the high-safety all-solid-state lithium ion battery.

The invention discloses a production method of a sandwich-like structure solid polymer electrolyte membrane, and an application of the sandwich-like structure solid polymer electrolyte membrane in a solid-state lithium ion battery, and belongs to the technical field of solid-state lithium ion batteries. The production method comprises the following steps: taking a polymer and an alkali metal saltaccording to a mass ratio of (2-6):1, dissolving the polymer and the alkali metal salt in acetonitrile, and performing stirring and uniform mixing to obtain a solution A; taking half of the solution A, adding a plasticizer, and performing full stirring and uniform mixing to obtain a solution B; and respectively coating two sides of a support membrane with the solution A and the solution B, and drying the coated support membrane in a vacuum drying box for 12-24 h to produce the sandwich-like structure solid polymer electrolyte membrane. The invention also discloses a production method of a solid-state lithium ion battery using the sandwich-like structure solid polymer electrolyte membrane. The produced sandwich-like structure solid polymer electrolyte membrane has the advantages of high ionconductivity, good mechanical strength, low interface impedance, good interfacial stability, and effective improvement of the cycling stability of the solid-state lithium ion battery.

The invention discloses a solid lithium ion-super-capacitor hybrid battery. The battery comprises a lithium ion battery anode, an electrolyte, a lithium/carbon material composite cathode and a shell, wherein the electrolyte consists of a super-capacitor electrolyte and a lithium salt solid electrolyte membrane; the super-capacitor electrolyte is arranged between the lithium ion battery anode and the lithium salt solid electrolyte membrane; or the electrolyte consists of at least two layers of lithium salt solid electrolyte membranes with anionic lithium salts with different radiuses; the lithium salt solid electrolyte membranes are arranged in a gradient manner from one end of the lithium ion battery anode to the lithium/carbon material composite cathode according to the radiuses of the lithium salt anions from small to large; one or more than two layers of lithium salt solid electrolyte membranes close to one end of the lithium/carbon material composite cathode comprise carbon-containing materials. The solid lithium ion-super-capacitor hybrid battery has excellent properties of high specific capacity, high energy density, high power density, rapid power charging and discharging, and the like.

The invention belongs to the technical field of lithium ion battery preparation, and particularly relates to a method of preparing a solid-state lithium ion battery through photocuring 3D printing. According to the method, inorganic oxide active nanofillers with high lithium ion conductivity and positive and negative electrode active materials are compounded with a photosensitive polymer network matrix with a semi-interpenetrating structure respectively, and a compound solid electrolyte and positive and negative electrode paste materials with proper rheological properties and photosensitive properties are obtained. Integrated 3D printing of the solid-state lithium ion battery is realized by adopting a photocuring 3D printing technology, and post-treatment processes such as degreasing, sintering and the like are not needed. The technology can effectively reduce the production cost and the process period. The prepared battery has good mechanical properties, particularly, the solid-stateelectrolyte and the electrodes adopt the same photosensitive polymer network as the matrix, the cured electrode/electrolyte interface has good compatibility, and thus, the interface resistance can beeffectively reduced, and the interface compatibility and the process compatibility among a positive electrode, a negative electrode and a solid electrolyte material are solved.

The invention discloses an application of an integrated structure in a solid-state lithium ion battery, and belongs to the technical field of solid-state lithium ion batteries. The preparation methodcomprises the following steps: (1) uniformly coating an aluminum foil with a positive active material, a conductive agent, a binder and a solvent in a ball milling and mixing manner to obtain a positive plate; (2) uniformly stirring and mixing a polymer, inorganic particles, lithium salt and a solvent, and obtaining a composite solid electrolyte through a solution casting method; (3) putting the composite solid electrolyte obtained in the step (2) on the positive plate obtained in the step (1), and carrying out hot pressing by using a hot press to obtain a positive solid electrolyte integratedstructure; and (4) assembling the negative electrode into the all-solid-state lithium ion battery by using a metal lithium sheet. The all-solid-state lithium ion battery prepared by the method disclosed by the invention is small in interface impedance and excellent in cycle performance.

The invention relates to a solid electrolyte and an all-solid-state battery and belongs to the field of solid-state ion materials. A method comprises according to the nominal molar ratio of various elements in a garnet-type solid electrolyte chemical formula LiALaBMCNDZrEO12, subjecting a Li source, a La source, a Zr source, a M source, and an N source to wet ball milling and mixing; then providing 1 to 5% of excess Li source; drying and sieving the paste; and calcining uniformly mixed powder at high temperature under a certain condition to obtain a solid electrolyte material having a garnet-type cubic phase structure and containing a trace amount of La2Zr2O7 structure. A ceramic sheet prepared by using the solid electrolyte has high density, good ionic conductivity and good stability to lithium metal, and can be applied to solid-state lithium ion batteries.

The invention relates to a solid electrolyte of an all-solid-state lithium ion battery, in particular to a Gd doped Li7La3Zr2O12 johnstonotite type solid electrolyte and application thereof in the all-solid-state lithium ion battery. A preparation process of the Gd doped Li7La3Zr2O12 johnstonotite type solid electrolyte comprises the following steps: (1) mixing raw materials through ball milling;(2) roasting in a muffle furnace of which the temperature is 850 to 1000 DEG C, thus obtaining concentrated powder; (3) tabletting the concentrated powder, and roasting in a muffle furnace of which the temperature is 1100 to 1250 DEG C, thus obtaining a solid electrolyte tablet; (4) assembling the all-solid-state lithium ion battery in a glove box; (5) testing electrochemical performance of a battery by adopting an electrochemical instrument. The preparation method disclosed by the invention is simple in operation, the prepared solid electrolyte tablet is Gd doped Li7La3Zr2O12 which is of a johnstonotite structure, and very good lithium ion conductivity and a very good lithium dendrites inhibiting function are obtained; by applying the Gd doped Li7La3Zr2O12 johnstonotite type solid electrolyte to the all-solid-state lithium ion battery, the safety performance and the charge-discharge cycling performance of the battery can be increased.

Disclosed are electrochemical devices, such as lithium ion battery electrodes, lithium ion conducting solid-state electrolytes, and solid-state lithium ion batteries including these electrodes and solid-state electrolytes. Also disclosed are methods for making such electrochemical devices. In particular, a segmented cell architecture disclosed herein enables solid state batteries to be flexible and capable of assuming a rolled or folded stack structure.

The invention discloses preparation and application of a block polymer electrolyte and relates to the technical field of electrolytes for lithium-ion batteries. Block polymerization is carried out through a chemical method to prepare the block polymer electrolyte with different soft-hard segment ratios. A rigid isocyanate group molecular chain compound is built to improve the mechanical property and the thermal stability of the block polymer electrolyte as a skeleton and to provide certain ion channels; and a flexible hydroxyl group molecular chain compound is capable of improving the ion conductivity and the ion migration number of the polymer electrolyte to improve the charge-discharge performance of a solid-state lithium-ion battery as a main ion channel of the block polymer electrolyte, and is also capable of improving the interface property of the solid-state lithium-ion battery. The block polymer electrolyte has the advantages of high interface stability, a wide electrochemical window, a wide operating temperature range and high room-temperature ion conductivity; and a product is small in shrinkage rate, diverse in shape and suitable for a lithium-ion polymer battery.

A solid-state lithium-ion battery may include an anode, a solid electrolyte layer of material, and a cathode. Each consist of the solid electrolyte material and are interspersed with a current collector material such that electrical conductivity is enabled between the anode and the cathode via the solid electrolyte layer to form a solid state lithium ion battery made from a single material in common to the anode, the solid electrolyte layer and the cathode. A method of manufacturing a solid-state lithium-ion battery includes cold pressing Li₁₀GeP₂S₁₂/C anode composite layer, LGPS solid electrolyte layer, and Li₁₀GeP₂S₁₂/C cathode composite layer to enable electrical conductivity between the anode and cathode composite layers via the LGPS solid electrolyte layer. The material may alternatively include Li₃PS₄, Li₄GeS₄, Li₂S—SiS₂, Li₁₀SnP₂S₁₂, and LiVPO₄F or other materials not specifically identified.

The invention discloses a solid-state lithium ion battery and a preparation method thereof. The solid-state lithium ion battery is characterized by comprising a positive electrode, a negative electrode and a solid electrolyte, wherein the solid electrolyte is arranged between the positive electrode and the negative electrode, an organic solvent is dropwise added into the electrolyte and an electrode interface, the contact resistance between the electrolyte and the electrode interface in the solid-state lithium ion battery is reduced, and the performance of the solid-state lithium ion battery is improved. The solid-state lithium ion battery and the preparation method thereof are simple and convenient to operate, the interface resistance can be obviously reduced, and the performance of the solid-state lithium ion battery is improved.

The invention relates to a column quinone positive pole material for a lithium ion battery, wherein the material is a cyclic compound which is formed by connecting 5-7 p-benzoquinone units in para-positions through methylene by taking carbonyls of the p-benzoquinone units as electrochemical redox reaction sites. The column quinone positive pole material is used for preparing a solid state lithium ion battery. The method comprises the following steps: 1) grinding an active matter, a conductive agent and a binder in an organic solvent to form a paste, coating the paste on a current collector, and drying in air to prepare an electrode; 2) by taking the electrode as a positive pole and lithium metal as a counter electrode and a reference electrode, separating the two electrodes by a PMA/PEG (Polymethyl Methacrylate/Polyethylene Glycol) gel polymer electrolyte, and assembling in argon or dried air to form the battery. The material provided by the invention has the advantages that the column quinone positive pole material has high carbonyl utilization ratio and high specific capacity; the column quinone positive pole material applied to a quasi solid lithium ion battery is high in specific discharge capacity and good in cycle performance, and is expected to be applied to the next generation of energy storage batteries with high high-energy density, high power density and long cycle life.