515 results about "All solid state" patented technology

The present invention relates to a sulfide-based solid electrolyte, a method for preparing same, and an all-solid-state battery comprising same. The sulfide-based solid electrolyte includes a compound containing lithium (Li), phosphorus (P), sulfur (S), and chlorine (Cl) and having an argyrodite-based crystal structure, wherein at least a portion of the crystal structure is doped with aluminum (Al), a Group 14 element (α), and oxygen (O), and the ion conductivity retention rate after exposure to moisture at a dew point of -40°C for 8 hours is 50.0% or more.

The present disclosure relates to an all-solid-state battery and a method of manufacturing the same, including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer stacked between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer includes a positive electrode current collecting layer including a current collecting material and a first positive electrode active material; a first positive electrode active material layer disposed on one surface of the positive electrode current collecting layer in a stacking direction and including a second positive electrode active material; and a second positive electrode active material layer disposed on the other surface of the positive electrode current collecting layer in a stacking direction and including a second positive electrode active material.

This application relates to the field of solid-state battery technology, and discloses an all-solid-state battery with a stress-relieving localization layer at the electrode interface and its manufacturing method. The localization layer includes a stress-relieving localization layer with a thickness of 1μm-5μm, which is composed of 5wt%-20wt% of a conductive elastomer containing polar side-chain functional groups and 80wt%-95wt% of nano-sized sulfide solid electrolyte particles. During charge-discharge cycles, this localization layer disperses the localized mechanical stress generated by the lattice expansion of the electrode through the deformation of the flexible polymer segments, inhibiting microcrack propagation and interface delamination; and spontaneously rebuilds physical and electrical contacts by recombining dynamically reversible non-covalent chemical bonds at the points where the polar side-chain functional groups detach from the interface. This invention achieves spatial decoupling between interface stress buffering and low bulk impedance, improving the battery's long cycle life and high-rate output performance.

Provided in the present embodiments are an all-solid-state battery, a solid electrolyte therefor, and a method for preparing the solid electrolyte, wherein the battery comprises: a positive electrode comprising a positive electrode active material; a negative electrode comprising a negative electrode active material; and a solid electrolyte disposed between the positive electrode and the negative electrode and comprising Cl-doped Li6-xPS5-xCl1+x (where x is a real number satisfying 0 < x < 0.8).

This disclosure provides a method, apparatus, equipment, and product for testing crack propagation in all-solid-state batteries. By establishing a lithium-ion diffusion-induced strain model, a phase-field fracture model, and a fatigue damage model, it can not only finely simulate the actual material strain inside the cathode particles under the rigid constraint of the solid electrolyte, as well as the crack propagation and interface peeling process inside the particles under strain, during the cyclic charging process of all-solid-state batteries, but also finely simulate the contact interface between the cathode particles and the solid electrolyte, as well as the corresponding material strain and crack propagation under the solid electrolyte. This allows for a realistic reflection of various mechanical failure behaviors of all-solid-state batteries during cyclic charging and discharging, comprehensively characterizing the spontaneous propagation and interaction of cracks at the particle-electrolyte interface and between electrolytes, thus playing a comprehensive role in simulating crack propagation.

The application provides a preparation method of a full-solid-state lithium battery electrolyte and an integrated battery for energy storage, and belongs to the technical field of lithium ion secondary batteries, and can at least partially solve the problems of insufficient comprehensive performance of solid-state electrolyte, large solid-solid interface impedance, poor cycle stability, poor high-voltage adaptability and high safety risk of existing full-solid-state lithium batteries, and the application comprises the following steps: preparing a polydopamine functionalized graphene oxide aqueous solution, preparing a lithiated polyionic liquid ethanol aqueous solution, preparing a Co-N-C dispersion, preparing an electrolyte film based on the above-mentioned solutions, then preparing a positive electrode and a negative electrode, sequentially stacking the positive electrode, the electrolyte film and the negative electrode, realizing close adhesion of the solid-solid interface through hot pressing, performing gradient heat curing treatment after assembly, finally adopting aluminum plastic film packaging to obtain an integrated battery. The integrated battery prepared in the application can effectively reduce the interface impedance, improve the cycle stability and high-voltage adaptability, reduce the safety risk, and optimize the comprehensive performance.

An all-solid-state battery system is disclosed, the system comprising an all-solid-state battery comprising a plurality of cells arranged in a closed inner space of a pressurization chamber and a pressurizing fluid filled in the closed inner space of the pressurization chamber, a state detector configured to detect state information of the all-solid-state battery, a controller configured to output a control signal configured for controlling a pressure applied to the plurality of cells by the pressurizing fluid in the inner space of the pressurization chamber based on the state information of the all-solid-state battery detected by the state detector, and a pressurizing device configured to control the pressure applied to the plurality of cells by the pressurizing fluid according to the control signal outputted by the controller.

The present invention provides: an electrode stack which can be used for assembly of an electrochemical element, while being capable of having a reduced internal resistance; a method for producing this electrode stack; and an electrochemical element which uses this electrode stack.　An electrode stack according to the present invention comprises a first electrode, a second electrode, and a separation layer that is interposed therebetween; at least one of the first electrode and the second electrode comprises an electrode mixture layer and a sheet-like porous metal base material; the porous metal base material is integrated with the electrode mixture layer by having at least a part thereof including the electrode mixture layer-side end embedded in the superficial part of the electrode mixture layer; and the other end of the porous metal base material is exposed in the surface of the electrode. An electrochemical element according to the present invention comprises an outer case which has a conduction path that leads to the outside, and an electrode stack according to the present invention; and a porous metal base material in the surface of an electrode of this electrode stack is brought into contact with the conduction path so that the electrode and the conduction path are electrically connected to each other.

Provided are a cathode active material for a lithium-ion battery having good battery characteristics, a cathode, a battery, and a method for manufacturing the cathode active material. 【Solution means】 A cathode active material represented by the composition shown in the following formula (1), Li a Ni b Co c Mn d Ta e O f (1) (In formula (1), 1.0 ≤ a ≤ 1.07, 0.8 ≤ b ≤ 0.9, b + c + d + e = 1, 1.8 ≤ f ≤ 2.2, 0.001 ≤ e / (b + c + d + e) ≤ 0.005.) Regarding the magnitudes of the coefficient of variation CV1, which is the value obtained by dividing the standard deviation of the average Ta element concentration inside the primary particles by the average Ta element concentration obtained by TEM-EDX analysis, and the coefficient of variation CV2, which is the value obtained by dividing the standard deviation of the average Ta element concentration at the grain boundaries of the primary particles by the average Ta element concentration at the grain boundaries of the primary particles, CV2 > CV1, and the average Ta element concentration at the grain boundaries obtained by TEM-EDX analysis is higher than the Ta element concentration of the cathode active material for a lithium-ion battery analyzed by ICP, a cathode active material for a lithium-ion battery.

Provided herein are a monomolecular compound for self-assembly, a self-assembled monolayer using same, a current collector using same, an all-solid-state battery using same, and a manufacturing method therefor, wherein the monomolecular compound comprises: a functional group containing fluorine (F); a spacer including CxF2x (6≤x≤12) or CxF2x−4H4 (6≤x≤12); and a reactive group containing phosphorus (P) or silicon (Si).

The application provides a sulfide full-solid-state battery positive electrode material and a preparation method and application thereof, and the sulfide full-solid-state battery positive electrode material comprises a positive electrode active substance and a composite sulfide solid electrolyte; the composite sulfide solid electrolyte comprises a sulfide solid electrolyte matrix and a metal fluoride layer coated on the surface of the sulfide solid electrolyte matrix. The sulfide solid electrolyte is coated with a layer of metal fluoride, on the one hand, the stable metal fluoride effectively isolates the sulfide from direct contact with air, greatly improves the air stability of the sulfide, and alleviates the problem that the sulfide solid electrolyte is sensitive to air; on the other hand, the metal fluoride coating layer can avoid the direct contact between the sulfide solid electrolyte and the positive electrode material, and alleviate the instability between the positive electrode material and the electrolyte, which provides an effective idea for the industrialization of the full-solid-state battery.

The application relates to the technical field of batteries, in particular to a full solid-state battery and a preparation method thereof. The full solid-state battery comprises a positive electrode sheet, a negative electrode sheet, an electrolyte film, a first insulating adhesive edge and a second insulating adhesive edge. The electrolyte film is arranged on at least one side surface of the negative electrode sheet along the thickness direction, the first insulating adhesive edge and the second insulating adhesive edge are arranged on the two side edges of the electrolyte film along the width direction, and the positive electrode sheet is arranged in the gap between the first insulating adhesive edge and the second insulating adhesive edge. Compared with the prior art, the full solid-state battery provided by the application solves the interface problems that the full solid-state electrolyte cannot be bent and the active material at the R corner cannot be pressed by adopting the gap coating mode to arrange the insulating coating at the R corner position, solves the edge insulation and alignment problems by constructing the edge insulating adhesive on the upper and lower edges of the negative electrode and wrapping the upper and lower edges of the positive electrode, and the production efficiency is improved and the production cost is greatly reduced.

The present invention relates to an all-solid-state battery and a method for manufacturing same. More specifically, the all-solid-state battery of the present invention comprises: a positive electrode layer including a positive electrode current collector and a positive electrode active material layer on the positive electrode current collector; a negative electrode layer; and a solid electrolyte layer provided between the positive electrode layer and the negative electrode layer. The content of the residual solvent in the positive electrode active material layer or the solid electrolyte layer is 1,000 ppm or less.

Provided is a negative electrode for an all-solid-state battery, an all-solid-state battery including the negative electrode, and a method for manufacturing a negative electrode for an all-solid-state battery, and more particularly to a negative electrode for an all-solid-state battery including a negative electrode current collector and a coating layer on the negative electrode current collector. The negative electrode current collector includes a first region and a second region surrounding the first region, and the second region includes a plurality of irregularities, an all-solid-state battery including the negative electrode, and a method for manufacturing a negative electrode for an all-solid-state battery.

This invention belongs to the field of lithium-ion secondary battery technology, specifically relating to a method for transferring a solid electrolyte membrane, an electrode with a solid electrolyte membrane on its surface, and a solid-state battery. This invention obtains an adhesive with both moderate adhesion and high elasticity by compounding polyisobutylene with a styrene-ethylene-butene-styrene block copolymer (SEBS). This adhesive utilizes the synergistic effect of polyisobutylene providing interfacial adhesion and SEBS providing stress buffering, achieving temperature-sensitive transfer control with low-temperature pickup and high-temperature release within a specific temperature range. By adjusting the ratio of polyisobutylene to SEBS, a rigid-tough layer formulation for the positive electrode and a flexible layer formulation for the negative electrode are obtained, further constructing a bilayer solid electrolyte membrane. This invention achieves high-fidelity transfer of the solid electrolyte membrane to the electrode, significantly reducing interfacial defects and short-circuit risks, improving the cycle stability and thermal safety of the battery, and is suitable for the large-scale manufacturing of high-energy-density all-solid-state batteries.

Disclosed is a positive electrode for a full solid battery, a positive electrode composition, and a full solid battery including the positive electrode, the positive electrode for a full solid battery including a current collector and a positive electrode active material layer disposed on the current collector, wherein the positive electrode active material layer includes: a positive electrode active material; a sulfide-based solid electrolyte; a dispersion medium including a compound represented by Chemical Formula 1; a binder; an electrolyte salt; at least one of a monofunctional or higher functional (meth)acrylate having an alkylene glycol group, an oligomer thereof, and a crosslinked product thereof; and a conductive material.

This application relates to the field of battery technology and discloses an interface-controlled bipolar all-solid-state battery and its manufacturing method. The battery includes a shared current collector, an interface resistance reduction layer, a solid electrolyte layer, and positive and negative electrode active material layers stacked together. The shared current collector is a nickel-based alloy foil; the interface resistance reduction layer is an amorphous Li-P-S-O thin film; and the solid electrolyte layer comprises modified sulfide solid electrolyte powder and a binder. The absolute value of the difference in the average linear thermal expansion coefficient between the shared current collector and the modified sulfide powder within the temperature range of 25°C to 200°C is ≤0.6 ppm / °C. The manufacturing method includes magnetron sputtering deposition of the interface layer, wet coating preparation of the electrolyte layer, and hot pressing. This invention effectively suppresses interfacial side reactions and eliminates interfacial delamination caused by thermal stress by introducing an ion-conducting interface layer and matching the material's thermal expansion coefficient, significantly reducing interface resistance and increasing the battery's power density.

Provided are an electrode with which an all-solid-state battery having a low internal resistance can be configured, a method for producing the electrode, and an all-solid-state battery having a low internal resistance.　This electrode for an all-solid-state battery is characterized by including a molded electrode-mix object comprising a solid electrolyte (B) and a composite obtained by press-molding a mix comprising an active material and a solid electrolyte (A), the solid electrolyte (B) being the same as or different from the solid electrolyte (A), the molded electrode-mix object having a porosity of 10% or less and an area larger than 1.8 cm2. This all-solid-state battery includes a power generation element comprising a positive electrode, a negative electrode, and a solid electrolyte layer, and is characterized in that the positive electrode and / or the negative electrode is the aforementioned electrode for an all-solid-state battery.

This invention discloses a high-performance, safe solid-state battery based on a three-dimensional metal mesh framework and a negative electrode coupler, belonging to the field of solid-state battery technology. The invention employs a three-dimensional metal mesh conductive framework with a thin insulating ion-conducting interface coated on its surface. A four-layer integrated negative electrode coupler is disposed on the negative electrode side, consisting of a metal current collector layer, a negative electrode active layer, a critical thin film layer, and an electrolyte connection layer, from the inside out. The three-dimensional framework and the current collector layer constitute an integrated large current collector system, achieving spatial decoupling of electron and ion pathways. The three-dimensional metal framework possesses an ultra-large specific surface area, which, combined with the ultra-thin interface layer, forms a short ion transport path, achieving high ion conductivity, low interface impedance, and forming a complete logical closed loop with high energy density. The critical thin film layer uses a formulation below the percolation threshold to achieve ion conduction and electron blocking, suppressing lithium dendrites and internal short circuits. The positive electrode uses a high-nickel ternary material and can be modified with graphene and carbon nanotubes. This invention exhibits outstanding safety performance, strong process robustness, and suitability for mass production, and can be widely used in automotive, energy storage, and special power supplies.

The present invention relates to a solid electrolyte membrane, a manufacturing method therefor, and an all-solid-state battery comprising same, and, specifically, to a solid electrolyte membrane, a manufacturing method therefor, and an all-solid-state battery comprising same, the solid electrolyte membrane being capable of suppressing the vertical growth of lithium dendrites, thereby having significantly improved high-rate characteristics.

This invention relates to a fast-ion conductor-coated all-solid-state manganese-based cathode material for lithium-ion batteries and its preparation method, belonging to the field of lithium-ion battery technology. It includes a lithium-rich manganese-based cathode material substrate and a fast-ion conductor coating layer (Li) covering the surface of the substrate. 1+2 / 3a Nb 1‑4 / 3a W a O3, 0.1≤a≤0.4; the coating layer is 0.5%~2% of the bulk mass, and the coating layer thickness is 5~20nm; it is obtained by adding the positive electrode material bulk to Nb-W sol and adding lithium salt, drying to form a gel-coated precursor powder, and then calcining. This invention uses Li 1+2 / 3a Nb 1‑4 / 3a W a The O3 fast ion conductor coating strategy modifies the interface of the cathode material, and significantly improves the overall performance of the all-solid-state lithium-ion battery by constructing a stable interface layer.

Provided are a solid electrolyte separator, an all-solid-state battery comprising same, and a method for manufacturing the solid electrolyte separator, the solid electrolyte separator comprising: a first composite comprising Li2S and a first metal halide salt; and a first sulfide-based solid electrolyte, wherein the first metal halide salt comprises an alkali metal salt and a boron-group metal salt.

The present invention relates to an all-solid-state battery and a manufacturing method thereof and, more specifically, the all-solid-state battery comprises: a positive electrode layer including a current collector and a positive electrode active material layer, wherein the positive electrode active material layer includes a positive electrode active material and a sulfide-based solid electrolyte; a negative electrode layer including a current collector and a coating layer; and a solid electrolyte layer including a sulfide-based solid electrolyte and positioned between the positive electrode layer and the negative electrode layer, wherein the positive electrode active material layer includes a first active region and a first inactive region, the first inactive region is located on at least one side of the positive electrode active material layer, and the first inactive region is a region modified by a laser.

The present invention relates to a positive electrode for an all-solid-state battery. More specifically, the invention comprises a positive electrode current collector; and a positive electrode active material layer on the positive electrode current collector, wherein the positive electrode current collector comprises a main body portion and a positive electrode tab protruding in one direction from the main body portion, and the positive electrode active material layer comprises a first layer provided on the main body portion and a second layer on the first layer, and each of the first layer and the second layer may comprise a positive electrode active material, a solid electrolyte, and a binder. The binder content of the first layer is greater than the binder content of the second layer, and the second layer comprises a first region adjacent to the positive electrode tab and a second region remaining excluding the first region, wherein the binder content of the first region is greater than the binder content of the second region, and the ratio of the area of ​​the first region to the area of ​​the second region may be 1:9 to 4:6.

This invention discloses a continuous silicon nanowire anode material based on ALD seed layer-induced mesoporous confinement and its preparation method. The material comprises a mesoporous carbon framework with interconnected pore structures, and a one-dimensional silicon nanostructure located within the pores and extending continuously along the axial direction. The one-dimensional silicon nanostructure is connected to the inner wall of the mesoporous carbon through an interface modification layer, forming a continuous electron / ion transport pathway. The interface modification layer is formed by in-situ transformation of a metal oxide seed layer deposited on the inner wall of the pores under a silicon source gas and a reducing atmosphere, and its composition includes elemental metals, metal-silicon alloy phases, or metal silicides. Utilizing the spatial confinement effect of the mesoporous carbon, the radial expansion of the silicon nanostructure is restricted within the pores, reducing mechanical compression on the solid electrolyte; simultaneously, during the delithiation shrinkage process, the axial connectivity of the silicon nanostructure is maintained, alleviating solid-solid interface contact degradation, thereby improving the cycle stability and rate performance of the all-solid-state battery.