337 results about "Lithium metal" patented technology

The present application relates to a kind of lithium metal electrode and its manufacturing method, the lithium metal electrode of the present application includes: current collector;Metal layer, at least one surface of the current collector and including lithium alloy;Protective layer, on the metal layer;And film layer, on the surface of the protective layer, at least part includes LiF;When being measured by X-ray photoelectron spectroscopy (X-Ray Photoelectron Spectroscopy, XPS), the peak intensity that appears at 684~686eV is greater than the peak intensity that appears at 687~689eV.

The application provides a fluorinated ether solvent and an electrolyte applied to energy storage batteries, especially lithium metal batteries, and the fluorinated ether solvent has a structure shown in formula I. By introducing at least one fluorine atom at both ends of an ether molecular chain, the fluorinated ether molecule has excellent salt solubility, the introduction of the fluorine atom can effectively reduce the electron cloud density of ether oxygen to improve the oxidation stability of the ether molecule, and excellent cycle stability of the high-voltage lithium metal battery is achieved; meanwhile, the locally strong polar fluorinated end group can interact with the cation of the salt to improve the ionic conductivity of the electrolyte, and the rapid charge-discharge performance of the high-voltage lithium metal battery is improved.

The present disclosure provides a composite pre-lithium thin film and a preparation method thereof and related applications. The composite pre-lithium thin film comprises a loading layer having a first surface and a second surface opposite to the first surface, and the material of the loading layer comprises multi-walled carbon nanotubes; a lithium pouring layer arranged on the first surface of the loading layer; and a resistance buffer layer arranged on the second surface of the loading layer, and the material of the resistance buffer layer comprises single-walled carbon nanotubes and polyvinyl butyl, wherein the mass percentage of the single-walled carbon nanotubes is 0-80 wt.%. The scheme provided by the present disclosure can effectively improve the cycle performance and rate performance of lithium ion batteries, and solve the problems of uncontrollable pre-lithiation rate and easy breaking of lithium metal strips.

The present invention relates to a lithium secondary battery positive electrode active material and a method for producing a positive electrode active material. The positive electrode active material of the present invention comprises lithium metal oxide particles comprising lithium, nickel, cobalt, and manganese, and satisfies the following formula 1. <Formula 1> A-B ≤ 1.30 In the formula 1, A is the sum of the values of fine powder of 1 μm or less after 3 g of the positive electrode active material as a test sample is put into a mold having a diameter of 1.3 cm and is pressed with a pressure of 9 tons (ton), and B is the sum of the values of fine powder of 1 μm or less before the pressing.

The application provides a modified current collector for self-generating a negative lithium metal battery, and belongs to the technical field of lithium metal batteries. The modified current collector introduces a nanoscale-thickness Ge amorphous thin film on the surface of a copper foil, so that the Ge amorphous thin film is converted into a uniform and dense intermetallic compound layer in situ during the first lithium deposition process, and the alloying speed is fast, thereby significantly reducing the lithium nucleation overpotential, guiding the lithium metal to grow in a high-density and two-dimensional layer shape, and finally obtaining a smooth and dense lithium deposition layer, and greatly improving the cycle stability and safety of the battery.

To provide a method for producing coated particles that, when used as a positive electrode active material for non-aqueous electrolyte secondary batteries, including lithium-ion secondary batteries, result in non-aqueous electrolyte secondary batteries exhibiting excellent charge / discharge capacity, electrical resistance, and cycle characteristics. [Solution] The manufacturing method according to the present disclosure comprises an addition step of adding a boron-containing additive compound to a lithium metal composite oxide to obtain a mixture, and a heat treatment step of applying heat treatment to the mixture to obtain coated particles, wherein in the heat treatment step, the sulfate ion concentration in the mixture before heat treatment is 1200 ppm or more and 5000 ppm or less, and the amount of sulfate ions relative to the amount of boron (SO4 / B) is 0.1 (mol / mol) or more and 1.0 (mol / mol) or less.

The invention discloses a composite modification film, a lithium metal negative electrode and a preparation method of the lithium metal negative electrode. The composite modified film comprises an organic polymer solid electrolyte, an inorganic solid electrolyte and a film-forming agent, and the mass ratio of the organic polymer solid electrolyte to the inorganic solid electrolyte to the film-forming agent is (10%-35%): (10%-35%): (30%-80%). The composite modified film effectively buffers cyclic stress, prevents early mechanical failure of the protective layer, and realizes mechanical durability of the interface protective layer; the immobilized film-forming agent can be slowly released, so that the continuous and stable repair of SEI is realized, the dynamic repair capability of the whole life cycle is provided, and the efficient cycle life of the battery is greatly prolonged; and the electrolyte does not need to depend on a high-concentration liquid additive, dramatic change of electrolyte components in circulation is avoided, the overall chemical stability of the battery is improved, and the stability of an electrolyte system is guaranteed.

The present invention relates to a cathode active material comprising: a lithium metal composite oxide having a lithium- and manganese-rich composition; and a coating layer formed on at least a portion of a surface of the lithium metal composite oxide, wherein the coating layer includes at least three coating elements from among Ti, Zr, Nb, Mo, and W.

This invention belongs to the field of lithium metal batteries, specifically relating to functional electrolytes, their preparation, application, and lithium metal batteries. The functional electrolyte is a mixed solution containing a conductive lithium salt and a composite solvent. The composite solvent includes solvents of formula 1 () and formula 2 (). The conductive lithium salt is a boron-containing conductive lithium salt. This invention innovatively combines formulas 1 and 2 as solvents, along with the combined control of the boron-containing lithium salt, thus achieving synergy and unexpectedly improving the performance of the functional electrolyte, particularly contributing to improved high-temperature cycling stability.

The present invention discloses a positive electrode active material, a method for manufacturing the same, and a battery. The positive electrode active material includes an inner core containing lithium metal phosphate, a first coating layer covering at least a portion of the surface of the inner core, and a second coating layer covering at least a portion of the surface of the first coating layer. The XRD diffraction peak intensity of the positive electrode active material in the range of diffraction angle 2θ being 35.5°-35.7° is S1. The XRD diffraction peak intensity of the positive electrode active material in the range of diffraction angle 2θ being 24.1°-25.4° is S2. S2 / S1 is (0.005-0.05):1. The XRD diffraction peak intensity of the positive electrode active material in the range of diffraction angle 2θ being 28.8°-29.2° is S3. S3 / S1 is (0.005-0.05):1.

The application discloses a lithium metal negative electrode and a preparation method and application thereof. The composition of the lithium metal negative electrode comprises a lithium metal layer and a polymer-ionic liquid composite protective layer, and can further comprise a metal substrate arranged on the side of the lithium metal layer away from the polymer-ionic liquid composite protective layer. The composition of the polymer-ionic liquid composite protective layer comprises a polymer and an ionic liquid. The lithium metal negative electrode can effectively inhibit dendrite formation, and the lithium ion battery assembled therefrom has excellent electrochemical performance and high safety, and is suitable for large-scale popularization and application.

A lithium metal battery according to one embodiment of the present disclosure comprises an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; an electrolyte that impregnates the electrode assembly; and a battery case that incorporates the electrode assembly and the electrolyte, wherein the negative electrode comprises a negative electrode current collector and a lithium metal layer formed on at least one surface of the negative electrode current collector, and wherein the lithium metal battery is charged and discharged under a state where a pressure of 2 kgf / cm2 or more and 30 kgf / cm2 or less is applied thereto.

The present invention relates to a gel-type polymer electrolyte, a lithium metal battery comprising same, and a method for manufacturing same and, more specifically, comprises: an organic solvent; a lithium salt; an additive; and a crosslinked polymer, wherein a current collector includes an organic phosphate, the lithium salt includes at least one of a borate-based lithium salt and a fluorine-based lithium salt, and the organic phosphate is a low-molecular compound having a molecular weight (Mw) of 100-400 g / mol and is dispersed in the organic solvent.

The invention provides a method for the prelithiation of an anode material. The method comprises providing a transfer sheet having a layer of lithium metal (Li) or lithium-containing alloy deposited on a surface thereof, and bringing the transfer sheet into contact with the anode material. Molten lithium or a molten lithium-containing alloy may be used to deposit the layer of Li or lithium-containing alloy onto the transfer sheet.

This invention relates to a lithium metal electrode and a method for manufacturing the same. The lithium metal electrode of this invention includes a current collector; a metal layer located on at least one side of the current collector and comprising a lithium alloy; and a protective layer located on the metal layer, the protective layer comprising amorphous carbon and silicate clay minerals having a 2:1 crystal structure.

A lithium ion battery includes a cathode including a cathode active material; an anode including silicon, a conductive carbon, lithium metal, or a combination of any two or more thereof; a separator; and an electrolyte including a lithium sulfonylimide salt, a dicarbonyl solvent, and a fluorinated ether solvent.

The application relates to a structural battery electrolyte with excellent impact resistance and a preparation method and application thereof, wherein the structural battery electrolyte is prepared by compounding main raw materials such as colloidal nanoparticles, shear thickening additives, lithium salts, fluoroacetonitrile (FAN), polymer precursors, initiators and the like through chemical action. The colloidal nanoparticles account for 2 wt%-30 wt% of the total amount of the electrolyte, the shear thickening additives account for 0.2 wt%-2 wt% of the total amount of the electrolyte, and the lithium salt / FAN=1.0-1.5 M. The application adds colloidal nanoparticles and polymer additives into a fluoroacetonitrile (FAN) solution containing lithium salts, realizes the shear thickening performance of the electrolyte by using the "particle cluster" theory, and further endows the battery with the ability of resisting impact and preventing thermal runaway. The shear thickening electrolyte prepared by the application has excellent impact resistance, high conductivity and excellent stability, provides a new idea for the preparation and optimization of the impact-resistant structural electrolyte, and is favorable for improving the safety of lithium metal batteries.

This invention relates to a lithium metal secondary battery anode containing an alloy protective layer prepared by physical deposition and its preparation method. A lithium strip used as the anode of the lithium metal secondary battery is cut and sampled, and then a lithium-tin alloy thin film with a thickness of 30nm to 50nm is physically deposited by magnetron sputtering, thereby forming a thin film interface protective layer on the surface of the anode. The lithium battery containing this interface protective layer achieves uniform dissolution and deposition of lithium metal during cycling. Furthermore, the anode with the lithium-tin alloy protective layer can be used in lithium metal secondary batteries. The lithium-tin alloy protective layer can improve the interface stability of the battery anode, resulting in better stability of the lithium metal secondary battery, thereby achieving battery cycle interface stability and a long cycle life.

A lithium metal anode includes a lithium metal or lithium metal alloy foil coated with a cured polymer composite material comprising a siloxane-based polymer and a lithium salt. Further described are related methods for applying a coating solution according to this disclosure to the lithium metal or lithium metal alloy foil to form a coated lithium metal anode, related coating solutions, and a secondary battery including said anode.

The present invention relates to a lithium secondary battery positive electrode active material comprising a lithium metal oxide in the form of single particles and a coating layer containing cobalt disposed on the surface of the lithium metal oxide, the coating layer being attached to the surface of the lithium metal oxide in the form of islands comprising a plurality of mutually spaced attached particles, the average coating rate of the coating layer being 35 to 48 area% based on the total surface area of the single particles.

The present invention relates to a lithium secondary battery cathode material, and the lithium secondary battery cathode material of the present invention includes a cathode active material, and the cathode active material includes lithium metal oxide particles containing lithium, nickel, cobalt, and manganese, and the average roughness (Ra) of the surface of the cathode material can be 1.0 μm or less in a first roughness measured by the average value of the active material within a randomly selected 40 μm x 40 μm range.

This application provides a solid-state battery, a solid-state electrolyte material, and an electrical device. The solid-state battery includes a positive electrode, a first solid-state electrolyte membrane, a second solid-state electrolyte membrane, and a negative electrode, stacked sequentially. The negative electrode is a lithium metal negative electrode. The first solid-state electrolyte membrane is made of a sulfide solid electrolyte. The second solid-state electrolyte membrane is made of a material with the general formula Li. 5.2≤7‑2x‑na+y≤7.1 Ga x La b M1 y Zr 2‑a Q a O 12 The compound has the following properties: 0 < x ≤ 0.3, 0 ≤ y ≤ 0.5, 0 ≤ a ≤ 0.8, 0 < b ≤ 3. M1 includes one or more of Group II main metal elements, and Q includes one or more of Group I main metal elements, Group III transition metal elements, Group V main and transition metal elements, and Group VI main and transition metal elements. The oxidation state of Q is V1, n = V1 - 4, -2 ≤ n ≤ 1, 5.2 ≤ 7 - 2x - na + y ≤ 7.1. The solid-state battery can achieve both high battery capacity and good cycle performance and rate performance.

A battery cell comprising A anode electrodes, C cathode electrodes, and S separators. The A anode electrodes and the A external tabs include a metal layer including lithium metal forming both an anode active material layer and an anode current collector. The A anode electrodes, the C cathode electrodes, and the S separators are arranged in a predetermined order adjacent to one another, where A, C, and S are integers greater than one. The battery cell includes A external tabs extending from the A anode electrodes, a negative battery tab including nickel, a copper strip arranged around the A external tabs of the A anode electrodes in a direction transverse to a longitudinal direction of the negative battery tab. One end of the negative battery tab is ultrasonically welded to the copper strip and the external tabs of the A anode electrodes.

This invention relates to an electrolyte for lithium-ion batteries or lithium metal batteries, a method for preparing the electrolyte, and a lithium battery. The electrolyte comprises a lithium salt, an organic solvent, and functional additives, wherein the functional additives include aluminum alkoxide compounds. A battery containing the additives is also provided. Based on the discovery that ethylene carbonate (EC) degrades battery thermal safety under high-temperature thermal abuse conditions, aluminum isopropoxide is innovatively introduced as a functional additive. This additive is stable at room temperature, but under high-temperature thermal abuse scenarios, it can act as a Lewis acid catalyst, specifically catalyzing the ring-opening polymerization reaction of EC in the electrolyte to generate polymer segments. Compared with existing technologies, the electrolyte provided by this invention effectively improves the high-temperature storage performance and thermal shock resistance of the battery without sacrificing its room-temperature electrochemical performance.

An embodiment of the present disclosure provides an interlayer produced from an electrolyte additive carrying with a large amount of metal nitrates by subjecting a polymer solution, wherein metal nitrates are dissolved, to an electrospinning method, and also further includes the interlayer in a lithium metal battery using a carbonate electrolyte to thereby provide a lithium metal battery having significantly superior electrochemical performance and stability compared to lithium metal batteries using conventional commercially available carbonate electrolytes.

This invention discloses a carbon-coated iron porous aerogel, its preparation method, and its application in lithium metal anodes, belonging to the field of lithium metal anode material preparation. The carbon-coated iron porous aerogel of this invention constructs a continuously conductive and highly stable carbon-based porous three-dimensional framework through the synergistic effect of two-dimensional graphene oxide, one-dimensional carbon nanotubes, and carbon-coated iron units. The NaCl hard template effectively amplifies the macropore size and increases the number of pores, providing interconnected channels for the rapid wetting and spontaneous climbing of molten lithium. The carbon-coated iron interface serves as a stable lithiophilic site, inducing uniform nucleation of lithium metal and restricting disordered growth, thereby achieving stable confinement of lithium metal in the composite electrode.

Disclosed is an electrode-electrolyte laminate and a method of manufacturing an electrode-electrolyte laminate, for use in a lithium-metal cell. The method includes depositing a ceramic electrolyte layer onto a first surface of a polymer separator, and depositing a layer of lithium metal onto an exposed surface of the ceramic electrolyte layer. The electrode-electrolyte laminate prepared by the method is useful in the manufacture of an electrochemical cell.