101results about How to "High Capacity Features" patented technology

A number of materials with the composition Li_1+xNi_αMn_βCo_γM′_δO_2−zF_z (M′=Mg,Zn,Al,Ga,B,Zr,Ti) for use with rechargeable batteries, wherein x is between about 0 and 0.3, α is between about 0.2 and 0.6, β is between about 0.2 and 0.6, γ is between about 0 and 0.3, δ is between about 0 and 0.15, and z is between about 0 and 0.2. Adding the above metal and fluorine dopants affects capacity, impedance, and stability of the layered oxide structure during electrochemical cycling. Another aspect of the invention includes materials with the composition Li_1+xNi_αCo_βMn_γM′_δO_yF_z (M′=Mg,Zn,Al,Ga,B,Zr,Ti), where the x is between 0 and 0.2, the α between 0 and 1, the β between 0 and 1, the γ between 0 and 2, the δ between about 0 and about 0.2, the y is between 2 and 4, and the z is between 0 and 0.5.

A negative active material and a lithium battery including the negative active material. The negative active material includes primary particles, each including: a crystalline carbonaceous core having a surface on which silicon-based nanowires are disposed; and an amorphous carbonaceous coating layer that is coated on the crystalline carbonaceous core so as not to expose at least a portion of the silicon-based nanowires. Due to the inclusion of the primary particles, an expansion ratio is controlled and conductivity is provided and thus, a formed lithium battery including the negative active material may have improved charge-discharge efficiency and cycle lifespan characteristics.

The invention discloses a lithium-rich cathode material and a preparation method and an application thereof. The lithium-rich cathode material has a core-shell structure, and is composed of a core material lithium-rich solid solution and a shell material of one of layered ternary material and spinel structure material with lithium ionic conductivity; the preparation method I comprises the following steps: preparation of the core material, preparation of the core material coated with a shell material precursor, presintering treatment of a core-shell structure material and high-temperature sintering treatment; and the method II comprises the following steps: preparation of the core-material precursor, preparation of a gradient structure precursor material, presintering treatment of the core-shell structure material, and high-temperature sintering treatment. The preparation method disclosed by the invention has the advantages of being simple in technical process, nontoxic, harmless, simple in raw materials, few in byproducts, suitable for large-scale production and the like; the prepared lithium-rich cathode material has a gradient structure; the functional effect is materialized by the structure; the core has high capacity characteristic; the cycling stability of the material can be improved by the surface; and the lithium-rich cathode material can be widely applied to a lithium-ion battery.

The invention discloses a lithium ion battery ternary material with a double-coated surface. The lithium ion battery ternary material with the double-coated surface comprises a nickel-cobalt-manganeseternary material, wherein a lithium-rich layered oxide coating layer is covered on a surface of the nickel-cobalt-manganese ternary material; an aluminum fluoride coating layer is covered on a surface of the lithium-rich layered oxide coating layer; the lithium ion battery ternary material with the double-coated surface is not easy to fall off, and has good chemical stability and high capacity. The invention also discloses a preparation method of the lithium ion battery ternary material. The method comprises the steps of firstly adopting an organic complexing agent-auxiliary sol-gel method for covering lithium-rich layered oxide on the surface of the ternary material so as to form the lithium-rich coating layer; then using a liquid phase method for coating aluminum fluoride on the surfaceof the lithium-rich layered oxide coating layer, and obtaining the double-coated lithium ion battery ternary material. The preparation method is simple in process, high in operation feasibility, andhigh in element utilization rate.

The invention discloses a lithium-rich manganese material, a positive electrode material for a lithium-ion battery, a positive plate for the lithium-ion battery, the lithium-ion battery and a preparation method of the lithium-ion battery and relates to the technical field of lithium-ion batteries. The molecular formula of the lithium-rich manganese material is aLi2MnO3.(1-a)LiNi0.5Mn1.5O4.(1-a)LiNi0.5Mn0.5O2, wherein a is smaller than or equal to 0.3 and greater than or equal to 0.01. The positive electrode material comprises the lithium-rich manganese material; the positive plate is coated with the positive electrode material; an active material of the positive electrode material for the lithium-ion battery is the lithium-rich manganese material; and the active material of a negative electrode material is a SiO/C composite material. According to the lithium-rich manganese material, the defects that an existing positive electrode material is in low specific capacity and low in initialefficiency and an existing negative electrode material is low in coulombic efficiency and poor in cycle performance are relieved. Through the cooperation of the positive electrode material and the negative electrode material, the obtained lithium-ion battery has high specific energy and high security, and the energy density of the battery is greater than 320Wh/kg.

Provided is a cathode active material that can simultaneously improve the capacity characteristics, output characteristics, and cycling characteristics of a rechargeable battery when used as cathode material for a non-aqueous electrolyte rechargeable battery. After performing nucleation by controlling an aqueous solution for nucleation that includes a metal compound that includes at least a transition metal and an ammonium ion donor so that the pH value becomes 12.0 to 14.0 (nucleation process), nuclei are caused to grow by controlling aqueous solution for particle growth that includes the nuclei so that the pH value is less than in the nucleation process and is 10.5 to 12.0 (particle growth process). When doing this, the reaction atmosphere in the nucleation process and at the beginning of the particle growth process is a non-oxidizing atmosphere, and in the particle growth process, atmosphere control by which the reaction atmosphere is switched from this non-oxidizing atmosphere to an oxidizing atmosphere, and is then switched again to a non-oxidizing atmosphere is performed at least one time. Cathode active material is obtained with the composite hydroxide particles that are obtained by this kind of crystallization reaction as a precursor.

An electric storage device 10 has a first electric storage component 29 and a second electric storage component 30. The first component 29 and the second component 30 are connected in parallel. A positive-electrode mixture layer 22 contains a lithium cobaltate to increase a capacity. A positive-electrode mixture layer 27 contains an activated carbon to increase an output. A current collector 16 having through holes 16a is provided between the layers 22 and 27. A positive electrode terminal 25 is connected to a positive-electrode current collector 21 of the first component 29 through an electricity supply path 24 provided with a resistor 23. By this configuration, the electric current flowing through the first electric storage component 29 can be restricted when the device is charged or discharged with high current.

A multilayer printed board comprising a plurality of capacitive coupling layers (6) each consisting of a dielectric layer (4) and a power supply layer (3) and a ground layer (5) facing each other while sandwiching the dielectric layer (4), first vias (7) connecting between the power supply layers (3) included in the plurality of capacitive coupling layers (6), and second vias (8) connecting between the ground layers (5) included in the plurality of capacitive coupling layers (6).

The invention pertains to films comprising silicon, oxygen and carbon and the use of the films in integrated circuit technology, such as capacitor constructions, DRAM constructions, semiconductive material assemblies, etching processes, and methods for forming capacitors, DRAMs and semiconductive material assemblies.

The present invention relates to a silicon-carbon-based composite negative electrode active material, and a negative electrode for a secondary battery and a lithium secondary battery including the same, and particularly to a silicon-carbon-based composite negative electrode active material, in which physical stability is improved by including a carbon-based core capable of intercalating and deintercalating lithium ions and at least one silicon particle included in the carbon-based core and disposed in the form of being distributed in an outer portion of the carbon-based core, and a negative electrode for a secondary battery and a lithium secondary battery in which life characteristics are improved by including the same.

Provided are a non-aqueous electrolyte solution, which includes (i) a first lithium salt, (ii) lithium bis(fluorosulfonyl)imide as a second lithium salt, (iii) a phosphazene-based compound as a first additive, and (iv) a non-aqueous organic solvent, and a lithium secondary battery including the non-aqueous electrolyte solution.

With respect to a lithium secondary battery including the non-aqueous electrolyte solution of the present invention, since a robust solid electrolyte interface (SEI) may be formed on the surface of a negative electrode during initial charge and flame retardancy in a high-temperature environment may be provided to prevent the decomposition of the surface of a positive electrode and an oxidation reaction of the electrolyte solution, output characteristics and capacity characteristics after high-temperature storage as well as output characteristics may be improved.

The invention relates to a negative electrode material for a lithium ion battery, a preparation method of the negative electrode material and the battery, and discloses a preparation method of a silicon/silicon oxide/carbon composite negative electrode material for the lithium ion battery, the silicon/silicon oxide/carbon composite negative electrode material and the battery. The silicon-carbon composite negative electrode material prepared by adopting an in-situ oxidation method and a high-temperature pyrolysis method has a core-shell structure, and the obtained shell structure is stable andfirm in structure. According to the invention, a lithium storage active phase SiOx and an amorphous pyrolytic carbon coating layer are generated on the surface of the nano-silicon through the dual-core shell structure, volume expansion in the charging and discharging process of the nano-silicon can be well buffered on the premise that the capacity is not remarkably reduced, the high conductivity and stability of the pyrolytic carbon coating layer are helpful for enhancing the stability of the Si@SiOx and electrolyte interface SEI film, so that the composite material has high capacity, excellent rate capability and cycle performance.

The invention provides a cathode active material used for a lithium ion battery, which comprises a dispersion carrier and a composite material dispersing in the dispersion carrier. The dispersion carrier comprises silicon fibers and carbon fibers; and the composite material is a silicon/metal alloy. The conventional silica-based material has the problems of serious volume effect, pulverization and shedding during electrochemical lithium extraction, which causes poor cycle performance of the battery. The cathode active material can effectively solve the problems of the volume effect, the pulverization and the shedding so as to improve the cycle performance of the battery. The invention also provides a method for preparing the cathode active material, which comprises the following steps of: ball-milling and mixing the silicon fibers and the carbon fibers, and sintering the mixture at high temperature to prepare silicon-carbon fibers; ball-milling and mixing silicon and a metal, and sintering the mixture at the high temperature to prepare the silicon/metal alloy; mixing the silicon-carbon fibers and the silicon/metal alloy, adding the mixture into a dispersing agent, and dispersing the mixture with ultrasonic waves to obtain slurry; and volatilizing the dispersing agent in the slurry, and processing the slurry under a shielding gas at low temperature.

A two-dimensional perovskite material, a dielectric material including the same, and a multi-layered capacitor. The two-dimensional perovskite material includes a layered metal oxide including a first layer having a positive charge and a second layer having a negative charge which are laminated, a monolayer nanosheet exfoliated from the layered metal oxide, a nanosheet laminate of a plurality of the monolayer nanosheets, or a combination thereof, wherein the two-dimensional perovskite material a first phase having a two-dimensional crystal structure is included in an amount of greater than or equal to about 80 volume %, based on 100 volume % of the two-dimensional perovskite material, and the two-dimensional perovskite material is represented by Chemical Formula 1.

A lithium secondary battery includes a cathode including a cathode current collector, and a first cathode active material layer and a second cathode active material layer sequentially formed on the cathode current collector, an anode, and a separation layer interposed between the cathode and the anode. The first cathode active material layer and the second cathode active material layer include a first cathode active material particle and a second cathode active material particle, respectively, which have different compositions or crystalline structures from each other, and the first cathode active material particle and the second cathode active material particle include lithium metal oxides containing nickel. The second cathode active material particle has a single particle structure.

The invention proposes a processing liquid, and relates to the technical field of a solid-state electrolytic capacitor. The processing liquid comprises a solute and a solvent, wherein the solute is an organic or inorganic acid compound, the solvent comprises a water polymer material and an organic solvent, the organic or inorganic acid compound is selected from one or more of phosphoric acid, boric acid, benzoic acid, adipic acid, azelaic acid, sebacic acid, isophthalic acid, phthalic acid, maleic acid, benzene sulfonic acid and citric acid, and the water polymer material is selected one or more of polyethylene alkylene glycol, polyvinyl alcohol, polyethylene glycol glyceryl alcohol ester, polyethylene glycol glyceryl alcohol ester, polyethylene glycol sorbitol ether, polyethylene glycol, polybutylene glycol, polyethylene glycol and polyethylene oxide which has non-volatile characteristic. The processing liquid and a traditional dispersion liquid are used in a matching way, thus, the development of the dispersion liquid is prevented, the production period is shortened, and the cost is reduced.

A method of producing an electrode for an electricity storage device includes producing a paste to form an electrode active material layer, in which aggregates of a solids fraction material that contains at least an electrode active material and a binder are dispersed in a solvent, coating the paste on a surface of a current collector, and drying the current collector coated with the paste, to form the electrode active material layer formed of the solids fraction material. The paste is produced in such a manner that a content ratio of the solids fraction material in the paste is 60 to 80 mass %, an abundance ratio for the aggregates with a particle size that is equal to or smaller than 20 μm is at least 99%, and a viscosity at 25° C. and a shear rate of 40 s⁻¹ is 200 to 5,000 mPa·s.

Disclosed are: a composite nano porous electrode material having high charge-discharge properties and a high charge/discharge capacity; a process for producing the composite nano porous electrode material; and a lithium ion secondary battery produced utilizing the composite nano porous electrode material. The composite nano porous electrode material has such a porous structure that nano-sized pores are three-dimensionally connected, wherein the wall of each of the pores comprises olivine-type LiMnPO4 and carbon, the specific surface area (Sa) falls within the following range: 55 m2g-1 2g-1, the carbon content (Cc) falls within the following range: 15.5 wt% < Cc < 28 wt%, and the crystallite diameter is smaller than 39 nm. The composite nano porous electrode material can achieve a high charge/discharge capacity and a high-speed charge/discharge properties.

The invention provides a preparation method of a high-performance silicon carbon-graphite negative material. The preparation method comprises the following steps: taking silicon powder as a raw material, smashing titanium-containing compound and the silicon powder through ball-milling to obtain nanometer silicon slurry; mixing the nanometer silicon slurry and high-molecular compound and then performing vacuum-drying to obtain the silicon carbon precursor; performing dynamic carbonization and screening on the silicon carbon precursor, the high-molecular compound and the graphite, thereby obtaining the silicon carbon-graphite composite material. The problem that the conventional Si/C is bad in cycle performance and easy to expand is solved, and the cycle stabilization performance is improved.

The invention relates to a preparation method of a lithium titanate composite negative electrode material. The method comprises the steps of (1) weighing a lithium salt and titanium dioxide with a mole ratio of Li:Ti being (4.2-4.6):5 according to a matching ratio, placing the lithium salt and the titanium dioxide in a ball-milling tank, adding a dispersion agent and zirconium spheres, performing wet ball milling and uniform mixing, and drying the material after ball-milling; (2) placing a dried material in a CVD (Chemical Vapor Deposition) furnace, adding graphite and silicon oxide, and introducing an inert gas, wherein the weight matching ratio of the dried material, the graphite and the silicon oxide is as follows: 75-80 parts of dried material, 9-12 parts of graphite and 9-12 parts of silicon oxide; and (3) adjusting a parameter and a sintering condition of the introduced gas, and synthesizing the lithium titanate composite negative electrode material. The preparation method has the advantages of reasonable process, low cost, stable product performance and excellent electrochemical performance.