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

The invention discloses a semi-solid-state lithium ion battery and a preparation method thereof, and belongs to the technical field of lithium ion batteries, the preparation method of the semi-solid-state lithium ion battery disclosed by the invention comprises the following steps: injecting a semi-solid-state electrolyte into a dry battery in two times, and curing for two times, so that the semi-solid-state electrolyte is partially cured and then is transited to be completely cured, thereby obtaining the semi-solid-state lithium ion battery. The gelation process of the semi-solid electrolyte is controllable, and the curing reaction is more uniform; and meanwhile, formation and curing are completed at the same time, gas generated in the formation process can be discharged, the problem of lithium precipitation caused by a large number of bubble mark residues due to the fact that battery interface bubble holes cannot be closed after curing is solved, and the uniformity of an electrode interface is improved.

The invention is applicable to the field of solid-state electrolyte and solid-state lithium ion batteries, and provides a preparation method of cubic-phase lithium lanthanum zirconium oxide solid-state electrolyte, which comprises the control of phase, grain size and element doping, and comprises the following steps: firstly, synthesizing a metal oxide precursor by using a coprecipitation method; carrying out surface modification on the metal oxide precursor through a rotary evaporation process, and simultaneously completing drying treatment; calcining the modified precursor powder under certain temperature and atmosphere conditions to obtain a corresponding metal oxide; and adding a lithium source and a doping agent into the metal oxide, and sintering at a certain temperature, atmosphere and pressure environment to obtain the LLZO solid electrolyte material with the cubic phase structure. According to the invention, the target of preparing the cubic phase LLZO solid electrolyte at a relatively low sintering temperature is achieved by regulating and controlling the particle size of the powder and introducing the doping element.

The invention provides an all-solid-state lithium ion battery and a preparation method thereof. The all-solid-state lithium ion battery comprises a positive electrode, a sulfide electrolyte layer, an interface modification layer and a negative electrode which are sequentially stacked, the material of the interface modification layer comprises an ion transfer medium and an electron transfer medium, the ion transfer medium is selected from one or more of lithium-containing oxide, non-lithium metal and non-lithium metal oxide, and the electron transfer medium is selected from one or more of lithium-containing oxide, non-lithium metal and non-lithium metal oxide. And the electron transfer medium is selected from carbon materials with resistivity of 1 * 10 <-5 >-2 * 10 <-5 > omega / cm. The interface modification layer can enable passing lithium ions to be re-distributed and distributed more uniformly, and can reduce the nucleation barrier of metal lithium, so that the metal lithium can be uniformly deposited on the surface of the negative electrode, the formation of lithium dendrites can be inhibited, and the safety and cycling stability of the all-solid-state lithium ion battery can be further improved; and meanwhile, the transmission efficiency of lithium ions and electrons can be improved, so that the electrochemical performance of the all-solid-state lithium ion battery is improved.

The invention relates to the technical field of new energy automobile batteries, in particular to a solid-state lithium ion battery with a stable and safe structure and a preparation technology thereof.The solid-state lithium ion battery comprises a hard shell, a battery negative electrode, a battery positive electrode and a solid-state electrolyte, and the battery negative electrode, the battery positive electrode and the solid-state electrolyte are arranged in the hard shell; a pressure-equalizing side plate is fixedly arranged on the arc telescopic sleeve, and the pressure-equalizing side plate, the arc telescopic sleeve and the hard shell are matched to form a closed cavity; according to the solid-state lithium ion battery disclosed by the invention, through the cooperation of the voltage-sharing side plates, the arc-bending telescopic sleeve, the voltage regulating structure and the like, the contact pressure among the battery cathode, the battery anode and the solid-state electrolyte can be automatically increased during large-current charging and discharging of a new energy automobile, and the battery performance is improved.

The invention relates to the technical field of solid-state lithium ion batteries, in particular to a composite solid-state electrolyte diaphragm, a preparation method and an all-solid-state battery. According to the invention, a 3D ion / electron channel is constructed through a cellulose skeleton, an oxide electrolyte nanowire directional arrangement technology is adopted, and an in-situ interface lithium fluoride repairing layer is adopted, so that the industrialization bottleneck that high ion conduction-mechanical strength-interface stability is difficult to collaboratively optimize in the prior art is broken through; the common problems of insufficient bulk phase and interface ion conductivity, poor mechanical strength, poor compatibility with a high-nickel positive electrode / silicon carbon negative electrode and the like of a solid-state battery are effectively solved. The mass energy density of the prepared all-solid-state battery can reach 360 Wh / kg, the capacity retention ratio can still be maintained at 80% or above after 1100 times of circulation, and the all-solid-state battery successfully passes 190 DEG C thermal runaway and acupuncture tests and shows excellent safety performance and wide industrial application prospects.

The present disclosure relates to a lithium-ion battery, comprising: a silicon anode comprising an essentially pure amorphous porous silicon film deposited onto a current collector, and comprising a plurality of columnar structures; an electrolyte layer comprising one or more solid components, and a cathode layer.

The invention belongs to the technical field of solid-state batteries, and provides a lithium-ion solid-state electrolyte and a preparation method and application thereof. The lithium ion solid electrolyte comprises a polymer matrix, a lithium salt, a polar organic compound, a polymer monomer (comprising a first monomer and a second monomer) and an anion acceptor. The preparation method comprises the following steps: mixing a lithium salt and a polar organic compound to obtain a eutectic mixture; mixing a polymer matrix, a first monomer, a second monomer and an anion acceptor with the eutectic mixture to obtain a precursor solution; and coating a substrate with the precursor solution, curing and drying. The invention also discloses a solid-state lithium ion battery comprising the lithium-ion solid-state electrolyte and a manufacturing device of the solid-state lithium ion battery. The lithium ion solid electrolyte disclosed by the invention is high in room-temperature ionic conductivity, excellent in tensile strength, tensile elongation and high in breaking strength and incombustibility, and the lithium ion transference number is increased; therefore, the battery has long-term cycle stability, and the problem of electrode stress failure under low stacking pressure is solved.

The invention provides a curved-surface solid-state lithium ion battery and a manufacturing method thereof, the manufacturing method is an electric field driving 3D printing method based on a five-axis mechanical platform, the five-axis mechanical platform is composed of a printing nozzle part moving in the X-axis direction, the Y-axis direction and the Z-axis direction and a part rotating in the A-axis direction and the C-axis direction, and high-precision electric field driving 3D printing is combined. The high-precision manufacturing of the conformal object on the curved-surface substrate can be realized, and the formed curved-surface solid-state lithium ion battery can be applied to the fields of Internet of Things, wearable electronic equipment and the like.

The invention relates to the technical field of lithium ion batteries, and provides a solid-state lithium ion battery and a preparation method thereof. The positive plate and the negative plate are arranged in the shell and are wound or laminated; the positive plate comprises an aluminum foil, and a carbon coating layer, a positive electrode material layer and a positive electrode solid electrolyte layer which are sequentially arranged on each side of the aluminum foil from inside to outside; the negative plate comprises a copper foil, and a negative electrode material layer and a negative electrode solid electrolyte layer which are sequentially arranged on each side of the copper foil from inside to outside; the negative electrode material layer comprises a negative electrode active material, the negative electrode active material comprises a composite lithium elementary substance, and the composite lithium elementary substance comprises a lithium elementary substance layer, a lithium carbonate layer, a carbon coating layer and a solid electrolyte phase interface film which are sequentially arranged from inside to outside.

The invention discloses a modified lithium-rich manganese-based positive electrode material, a preparation method thereof and application of the modified lithium-rich manganese-based positive electrode material in a solid-state lithium battery, and belongs to the field of lithium ion battery materials. The modified lithium-rich manganese-based positive electrode material comprises a lithium-rich manganese-based positive electrode material and a coating layer LiAl thereof, the molecular formula of the lithium-rich manganese-based positive electrode material is xLi2MnO3. (1-x) LiMO2, M is one or more of transition metals Ni, Co and Mn, and x is more than 0 and less than 1; and the coating layer LiAl is formed by decomposing LiAlH4. The preparation method comprises the following steps: uniformly mixing a lithium-rich manganese-based positive electrode material xLi2MnO3. (1-x) LiMO2 and LiAlH4 through a solid phase method or a liquid phase method, and then annealing in an inert atmosphere to prepare the modified lithium-rich manganese-based positive electrode material. The problems of unstable interface and poor transmission kinetics in the sulfide-based all-solid-state lithium ion battery are solved at the same time, and the first-circle charge-discharge specific capacity and cycle stability of the solid-state lithium ion battery can be improved.

The invention discloses a composite positive electrode material, a preparation method thereof, a positive electrode plate and a solid-state lithium ion battery, and belongs to the technical field of secondary batteries. The composite positive electrode material comprises a lithium-rich positive electrode material, a halide solid electrolyte and high-voltage lithium cobalt oxide which are ball-milled and mixed. And the ratio of D90 of the lithium-rich positive electrode material to D90 of the high-voltage lithium cobalt oxide is 1: (1-5). The mass ratio of the lithium-rich positive electrode material to the high-voltage lithium cobalt oxide is (0.5-9.5): (9.5-0.5), and the halide solid electrolyte accounts for 5%-30% of the mass of the composite positive electrode material. When the composite positive electrode material is used for preparing the solid-state lithium ion battery, the discharge median voltage and the discharge specific capacity of the solid-state lithium ion battery can be improved.

The invention provides a single-crystal cobalt-free lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a cobalt-free lithium-rich manganese-based precursor material, a lithium source and a grain boundary separation auxiliary agent to obtain a mixed material; the mixed material is subjected to two-stage sintering, the two-stage sintering comprises first sintering and second sintering in sequence, and the single-crystal cobalt-free lithium-rich manganese-based positive electrode material is obtained, wherein primary crystal grains of the cobalt-free lithium-rich manganese-based precursor material are of a sheet structure. According to the invention, the cobalt-free lithium-rich manganese-based precursor material of which the primary crystal grains are of a sheet structure is taken as a raw material, and under the action of the grain boundary separation auxiliary agent, a two-stage sintering process is cooperatively matched, so that the single-crystal cobalt-free lithium-rich manganese-based positive electrode material which is uniform in grain size, high in dispersity, complete in crystal grains and continuous in interface is obtained, and the cobalt-free lithium-rich manganese-based positive electrode material is not only suitable for a liquid lithium ion battery, but also suitable for a lithium ion battery. The material is more suitable for a solid-state lithium ion battery, and the electrochemical performance of the battery is effectively improved.

The invention relates to the field of solid-state lithium ion batteries, in particular to a square solid-state lithium ion battery and a production process thereof.The square solid-state lithium ion battery comprises an electric power mechanism, and the electric power mechanism is used for conducting filling treatment on a conductive agent and an inorganic material in the battery; the adjusting mechanism is used for controlling and processing the temperature at the two ends of the battery when the battery is charged and discharged; the heat dissipation mechanism is used for carrying out heat dissipation treatment on the interior of the battery; the outer side of the power mechanism is provided with a cover shell, the adjusting mechanism is fixedly installed on the outer side of the cover shell, and the heat dissipation mechanism is fixedly installed at the bottom of an inner cavity of the cover shell. According to the invention, the compatibility between the electrode and the electrolyte can be improved, the interface resistance can be reduced, the migration of lithium ions at the interface can be promoted, the growth of lithium dendrites can be prevented, and the transmission efficiency of the lithium ions at the interface can be improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a high-density sulfide solid electrolyte and a pressure-maintaining sintering method and application thereof. According to the preparation method of the sulfide solid-state lithium ion battery electrolyte sintered under the pressure maintaining condition, water and oxygen can be effectively isolated, raw materials are in full contact, the crystallinity of the sulfide solid-state electrolyte is greatly improved, and the ionic conductivity is further improved. The pressure-maintaining sintering method can be suitable for synthesis of a series of sulfide solid electrolytes, and has high universality and wide application prospects.

The invention discloses application of a 2, 4-thiazolidinedione compound in a solid-state lithium ion battery electrolyte, the solid-state lithium ion battery electrolyte and a preparation method of the solid-state lithium ion battery electrolyte. The 2, 4-thiazolidinedione compound disclosed by the invention is used for preparing a solid-state lithium ion battery electrolyte, and the structure of the 2, 4-thiazolidinedione compound is as follows: # imgabs0 #, in which R1 to R7 are independently a sulfonic group, a cyano group, an ionic liquid group, a borate group, a polyether chain segment, an amino group and an ether group. The 2, 4-thiazolidinedione compound is used as a functional additive of an electrode material, the structural stability is improved through chemical bonding or physical coating, volume expansion is relieved, or an electron / ion conduction network is enhanced; a functional interface layer is formed on the surface of the electrode, so that side reaction (such as electrolyte decomposition) is inhibited, interface impedance is reduced, and the lithium metal negative electrode is stabilized (such as dendrite growth is inhibited); through an electrochemical decomposition or pre-passivation strategy, a stable solid electrolyte interface (SEI) is constructed, and the cycle life is prolonged.

The invention relates to the technical field of solid-state batteries, in particular to a silicon oxide negative electrode material for a solid-state lithium ion battery as well as a preparation method, a pre-lithiation method and application of the silicon oxide negative electrode material. The invention provides application of a silicon oxide negative electrode material in a negative electrode of a solid-state lithium ion battery, and aims to solve the problems of serious volume change of active substances, low energy density and poor cycle performance of a solid-state battery in the prior art. The silicon oxide negative electrode material comprises SiOx and / or a modified SiOx material, and x is more than 0 and less than 2. The invention also provides a silicon oxide negative electrode material for the solid-state lithium ion battery, the silicon oxide negative electrode material comprises SiOx and / or a modified SiOx material, and x is more than 0 and less than 2. The silicon oxide negative electrode material is relatively low in volume expansion rate, and the energy density and the cycling stability of the solid-state lithium ion battery can be improved.

The invention relates to the technical field of lithium batteries, and particularly discloses a phosphorus negative electrode, a preparation method thereof and an all-solid-state lithium ion battery. Comprising a negative active material and sulfide solid electrolyte, the sulfide solid electrolyte coats the negative active material; the negative electrode active material comprises phosphorus; and the D50 of phosphorus is 20-30 [mu] m. The all-solid-state lithium ion battery is prepared by coating the phosphorus material with the sulfide solid electrolyte, so that the rate capability and the cycle performance of the battery are improved. And the metal material is further coated on the phosphorus material, so that the rate capability and the cycle performance of the battery are further improved.

The invention provides a solid-state battery electrolyte material, a preparation method thereof and a solid-state lithium ion battery. The preparation method comprises the following steps: S1, carrying out first reaction on a first raw material comprising an organic ligand, zircon salt, a first acid solution and a first organic solvent to obtain a metal organic framework material; and step S2, carrying out a second reaction on a second raw material comprising dimethyl 2, 6-dipicolinate and a metal organic framework material to obtain the solid-state battery electrolyte material. The solid-state battery electrolyte material obtained by adopting the preparation method disclosed by the invention has good mechanical properties, a wider electrochemical window and higher ionic conductivity, so that the initial efficiency, the capacity and the cycle performance of the battery are improved, and the internal resistance of the battery is reduced at the same time.

The invention belongs to the field of solid-state batteries, and particularly relates to a solid-state electrolyte with a wide electrochemical window and a solid-state lithium ion battery. According to the solid electrolyte, the metal oxyhalide and the lithium-containing zeolite are subjected to ball milling, so that the solid electrolyte with relatively high ionic conductivity and a wide electrochemical window is obtained. The solid-state electrolyte is prepared into a solid-state electrolyte membrane, the solid-state electrolyte membrane, a positive electrode and a negative electrode are assembled into a solid-state lithium battery, an ionic liquid electrolyte and a polymer monomer are added, and the solid-state lithium battery is obtained through in-situ polymerization. A polymer network exists in the solid-state lithium battery, so that the lithium ion transmission performance in the positive electrode, the negative electrode and the solid-state electrolyte and the interface transmission performance of lithium ions in the positive electrode, the negative electrode and the solid-state electrolyte can be effectively improved, and the solid-state lithium battery has higher discharge capacity and better cycling stability performance.

The invention provides a modified solid electrolyte, a preparation method thereof and an all-solid-state lithium ion battery, and belongs to the technical field of all-solid-state lithium ion battery manufacturing. The modified solid electrolyte is of a core-shell structure, an inner core is made of inorganic solid electrolyte, a shell is made of lithium-free metal sulfide, and the modified solid electrolyte can effectively solve the problem that the inorganic solid electrolyte is poor in air stability, so that the corresponding all-solid-state lithium ion battery has relatively excellent cycle performance.

The invention relates to a preparation method of a quasi-solid-state lithium ion battery composite polymer electrolyte membrane, which comprises the following steps: 1) taking an X raw material, preserving heat at 300-800 DEG C, dispersing into a hydrochloric acid solution, filtering a suspension with deionized water to obtain solid particles, and drying to obtain a ceramic filler; 2) mixing PVDF and LiTFSI, adding the mixture into a DMF solvent, and stirring to obtain a solution A; (3) adding a ceramic filler into a DMF (Dimethyl Formamide) solvent, and carrying out ultrasonic treatment to obtain a suspension B; 4) slowly pouring the suspension B into the solution A, and uniformly stirring; and casting in a polytetrafluoroethylene mold, carrying out vacuum drying, and peeling off the formed film. The method has the advantages that the X raw material is subjected to simple annealing treatment to prepare the ceramic filler beneficial to carbon neutralization, and the ceramic filler can reduce the crystallinity of PVDF at normal temperature and improve the ionic conductivity. When the membrane is applied to a lithium metal quasi-solid-state battery, a relatively good capacity retention ratio is obtained.

The invention provides a lithium supplement compound, a lithium ion battery positive electrode and a solid-state lithium ion battery, the lithium supplement compound comprises a mixture of a first lithium supplement agent and a second lithium supplement agent, the molecular formula of the first lithium supplement agent is Li5FeO4, and the molecular formula of the second lithium supplement agent is Li2NiO2; the mass ratio of the first lithium supplement agent to the second lithium supplement agent is (1-4): 1. The lithium supplementing compound provided by the invention not only effectively improves the cycle performance and the first efficiency of the battery, but also reduces the gas production rate in the lithium supplementing process.

A lithium-ion battery cell includes an anode including a porous lithium storage layer disposed over an anode current collector and a modification layer provided on the lithium storage layer. The cell further includes a cathode having a cathode active material layer in electrical contact with a cathode current collector and a lithium-ion-containing solid-state electrolyte (SSE) that is interposed between the lithium storage layer and the cathode active material. The lithium storage layer includes at least 40 atomic % silicon, tin, germanium, or a combination thereof. The lithium storage layer includes discontinuities defining a plurality of lithium storage layer segments each having an upper surface and a sidewall. The modification layer is disposed on the upper surface and at least partially along the sidewall.

The invention discloses a 3D printing all-solid-state lithium ion battery negative electrode for energy storage and a preparation method thereof, and relates to the technical field of solid-state batteries. The 3D printing lithium ion battery negative plate comprises a current collector, wherein a first 3D printing layer and a second 3D printing layer are sequentially arranged on the current collector; wherein the first 3D printing layer is composed of a structure unit and a gap unit; the second 3D printing layer covers the first 3D printing layer; the first 3D printing layer and the second 3D printing layer respectively comprise a silicon-based material and / or a hard carbon material. According to the 3D printing lithium ion battery negative plate, the negative electrode with the porous structure is combined with the chemical stability of the silicon-based material and / or the hard carbon material layer on the negative electrode, so that the technical problems of poor solid-solid interface contact and volume expansion of an electrode material of an existing all-solid-state battery are solved. The preparation method solves the interface contact problem of a traditional coating process, does not need to depend on a high-cost surface modification technology, reduces the process cost and is suitable for large-scale production.

The invention discloses a semi-solid lithium ion battery and a preparation method thereof, and belongs to the technical field of lithium ion batteries. The semi-solid lithium ion battery comprises a positive plate, a negative plate, a diaphragm and an electrolyte, the positive plate and the negative plate are separated by the diaphragm, a battery cell is formed by lamination in a mode of wrapping a positive electrode by a negative electrode, the battery cell is packaged into a battery shell, electrolyte is injected, and the semi-solid lithium ion battery is obtained through processes of pre-charging, degassing and capacity grading. According to the invention, a positive electrode support type solid electrolyte film frame is constructed through double-layer coating of the positive plate, so that the ionic conductivity of the battery is improved, the interface impedance is reduced, the energy density and rate capability of the battery are improved, the cycle life of the battery is prolonged, and the safety and stability of the battery are enhanced.

The invention belongs to the technical field of lithium ion batteries, and provides an all-solid-state lithium ion battery and a preparation method thereof. The preparation method comprises the following steps: activating a positive electrode active material and a negative electrode active material; after the activation treatment is finished, immersing the positive electrode active material and the negative electrode active material into a conductive mixture solution for coating treatment; after the coating treatment is finished, sequentially drying and curing the positive electrode active material and the negative electrode active material to respectively obtain a positive electrode material and a negative electrode material; mixing a lithium salt, an organic polymer, a ceramic filler and an organic solvent to obtain an electrolyte mixture, coating a positive electrode material and a negative electrode material with the electrolyte mixture, and performing hot pressing treatment to obtain a positive electrode and a negative electrode respectively; and assembling the positive electrode, the negative electrode and the solid electrolyte to obtain the all-solid-state lithium ion battery. The invention not only effectively solves the interface problem of the current all-solid-state battery, but also provides a feasible technical path for industrial application of the solid-state battery.

The invention provides a solid-state battery which comprises a positive electrode, a negative electrode and a solid-state electrolyte layer, and the solid-state electrolyte layer is arranged between the positive electrode and the negative electrode; the positive electrode comprises a positive electrode active material and a first inorganic solid electrolyte; the positive electrode active material comprises a positive electrode active material and a polymer electrolyte coating the surface of the positive electrode active material; the solid electrolyte layer comprises a second inorganic solid electrolyte and an organic solid electrolyte compound; the organic electrolyte compound comprises a porous material and an organic electrolyte. Polymer electrolyte is introduced into the positive electrode, the prepared solid-state lithium ion battery is good in thermal stability, good in oxidation resistance and high in thermal stability, high electrical performance and low-pressure forming can be achieved, the working pressure of the solid-state battery is 3-10 MPa, and low-pressure working can be achieved.

The present invention discloses a porous composite foil, including a porous composite foil current collector; the porous composite foil current collector includes a polymer insulating layer and two metal conductive layers; the upper and lower sides of the polymer insulating layer are respectively covered with a layer of the metal conductive layer; a plurality of through holes are penetrated through the porous composite foil current collector; the outer side surface of each metal conductive layer in the porous composite foil current collector is respectively coated with a layer of mixed primer. The present invention also provides a positive electrode plate, a negative electrode plate and a semi-solid lithium ion battery and a preparation method. In view of the problem of large internal resistance of the original composite foil, the present invention introduces a mixed primer containing a conductive agent and an inorganic oxide solid electrolyte with good electronic conduction and ion conduction on the surface of the porous composite foil, thereby improving the bonding adhesion between the active material and the current collector, constructing a complete ion and electron transmission channel, reducing the internal resistance of the battery, and improving the rate performance.

The invention belongs to the technical field of solid-state batteries, and particularly discloses an active halide solid-state electrolyte material and a preparation method and application thereof, the active halide solid-state electrolyte material comprises an active halide solid-state electrolyte represented by the following formula: xLia A.MyN (1-y) B (ym + n-yn), and carrying out solid-phase reaction on the LiaA and the MBm or carrying out solid-phase reaction on the LiaA, the MBm and the NBn in an inert atmosphere to obtain the active halide solid electrolyte. The active halide solid electrolyte material has relatively high ionic conductivity, can be used as an electrolyte material, can also be used as an electrolyte additive self-sacrifice material to be applied to an electrolyte layer, can also be applied to a positive electrode of a solid-state lithium ion battery to provide capacity for the battery, and is beneficial to improving the energy density of the solid-state battery.

A solid electrolyte separator sheet for a solid-state lithium-ion battery is provided. The solid electrolyte separator sheet may comprise a membrane including solid electrolyte particles, an ion conducting polymer electrolyte binder, and a filament-type binder comprising chopped nanofibers. The ion conducting polymer electrolyte may include in situ formed, polyethylene-oxide-like polymer electrolyte.