276results about How to "Excellent battery characteristics" patented technology

An electrolyte solution and a battery which are capable of improving cycle characteristics are provided. An anode includes a simple substance, an alloy or a compound of a metal element or a metalloid element capable of forming an alloy with lithium as an anode active material. A separator is impregnated with an electrolyte solution formed through dissolving an electrolyte salt in a solvent. The electrolyte salt includes a first electrolyte salt including LiB(C₂O₄)₂ and a second electrolyte salt including at least one kind selected from the group consisting of LiPF₆, LiBF₄, LiN(CF₃SO₂)₂, LiN(C₂F₅SO₂)₂, LiClO₄, LiAsF₆ and LiC(CF₃SO₂)₃. In the solvent, 4-fluoroethylene carbonate is included. A coating is formed on the anode by the first electrolyte salt, and high ionic conductivity can be obtained by the second electrolyte salt. Further an oxidation-decomposition reaction of the electrolyte solution which occurs in a cathode can be prevented by 4-fluoroethylene carbonate.

A glass film for a lithium ion battery has a thickness of 300 μm or less and a surface roughness (Ra) of 100 Å or less.

Provided are nickel manganese composite hydroxide particles that are a precursor for forming cathode active material comprising lithium nickel manganese composite oxide having hollow structure of particles having a small and uniform particle size for obtaining a non-aqueous electrolyte secondary battery having high capacity, high output and good cyclability. When obtaining the nickel manganese composite hydroxide particles from a crystallization reaction, an aqueous solution for nucleation, which includes at least a metallic compound that contains nickel and a metallic compound that contains manganese, and does not include a complex ion formation agent that forms complex ions with nickel, manganese and cobalt, is controlled so that the temperature of the solution is 60 DEG C or greater, and so that the pH value that is measured at a standard solution temperature of 25 DEG C is 11.5 to 13.5, and after nucleation is performed, an aqueous solution for particle growth, which includes the nuclei that were formed in the nucleation step and does not substantially include a complex ion formation agent that forms complex ions with nickel, manganese and cobalt, is controlled so that the temperature of the solution is 60 DEG C or greater, and so that the pH value that is measured at a standard solution temperature of 25 DEG C is 9.5 to 11.5, and is less than the pH value in the nucleation step.

An electroactive material and a method of manufacturing the same is provided, in which the primary component of the electroactive material is a metal phosphate complex, and the electroactive material exhibits excellent charge/discharge characteristics. The electroactive material of the present invention is primarily composed of an amorphous metal complex represented by the general formula A_xM(PO₄)_y. Here, A is an alkali metal, and M is one or two or more elements selected from the transition metals. In addition, 0≦x≦2, 0<y ≦2. The electroactive material described above can be manufactured more inexpensively and in a shorter amount of time than a conventional electroactive material which employs a crystalline metal complex, and can exhibit the same battery characteristics as the aforementioned conventional electroactive material.

There are provided a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing the same. The cathode active material for a lithium secondary battery includes: a core made of a compound reversibly intercalating and deintercalating lithium; and a coating layer positioned on at least a portion of a surface of the compound, wherein the coating layer is a composite coating layer containing Li₃PO₄ and LiF, and further containing a lithium metal compound, a metal oxide, a metal fluoride compound, and/or a combination thereof, and the core is doped with fluorine.

Provided is a lithium composite oxide having a uniform and suitable particle size and high specific surface area due to a hollow structure that can be produced on an industrial scale. A nickel composite hydroxide as a raw material thereof is obtained controlling the particle size distribution of the nickel composite hydroxide, the nickel composite hydroxide having a structure comprising a center section that comprises minute primary particles, and an outer-shell section that exists on the outside of the center section and comprises plate shaped primary particles that are larger than the primary particles of the center section, by a nucleation process and a particle growth process that are separated by controlling the pH during crystallization, and by controlling the reaction atmosphere in each process and the manganese content in a metal compound that is supplied in each process.

Relating to cobalt sulfur compounds, the invention provides a preparation method and application of a cobalt sulfur compound. The method includes: dissolving a water soluble cobalt source and urea in a mixed solvent to form a solution, carrying out reaction to obtain cobalt carbonate, performing calcinations to obtain a cobalt oxide, and reacting the cobalt oxide with a sulfur source in a reducing atmosphere to obtain a micrometer-scale cobalt sulfur compound. The micrometer-scale cobalt sulfur compound can be spherical cobalt sulfur compound or lamellar square-like cobalt sulfur compound, and the obtained cobalt sulfur compound can be Co9S8, CoS, Co3S4 and CoS2, etc. The cobalt sulfur compound prepared by the preparation method provided by the invention can be applied as an electrode active material in preparation of secondary battery electrodes. According to the invention, specific shape cobalt sulfide can be prepared, is low in synthesis cost and has high tap density, and can be applied to secondary battery electrode materials, optical parametric oscillators, semiconductor materials, solar cells and other aspects.

The invention provides non-aqueous electrolyte for a lithium ion battery and a lithium ion secondary battery prepared from the non-aqueous electrolyte. The non-aqueous electrolyte for the lithium ion battery comprises cyclic carboxylic ester and/or cyclic carbonate ester, cyclic sulfate, an electrolyte salt, fluoroether with the following structural formula: Rf1-O-Rf2, and a fluorocarbon surfactant, wherein the Rf1 is a fluorine-containing alkyl group of which the carbon atom number is 3 to 4; the Rf2 is a fluorine-containing alkyl group of which the carbon atom number is 2 to 5; the mass percentage of the fluoroether in the electrolyte is 10 to 50 percent; and the fluorocarbon surfactant is used for further improving the performances of the battery. The high temperature performance and the safety of the lithium ion secondary battery prepared from the non-aqueous electrolyte can be kept at a higher level as a whole, and the cycling performance is improved.

A transition metal sulfide coated with carbon, a preparation method and an application relate to transition metal sulfide. The transition metal sulfide coated with the carbon comprises a nucleus and a coating layer on the surface of the nucleus, wherein the nucleus is a transition metal sulfide nucleus, and the coating layer is a carbon coating layer. The preparation method comprises the steps as follows: dissolving the transition metal sulfide in water, adding a carbon source, and coating the surface of the transition metal sulfide with carbon. The transition metal sulfide coated with the carbon is applied to preparation of an electrode material, and the electrode material could be a battery electrode material or the like, and is specifically used as an electrode active material to be applied in a secondary battery. The transition metal sulfide coated with the carbon is greatly improved in conductive performance, further improved in charge and discharge capacity and rate capability, greatly improved in coulombic efficiency and cycle performance, and low in material cost and simple in preparation process. The composite material used as an electrode material of a secondary lithium battery has high energy density, excellent cyclicity, and especially excellent rate capability, and is safe and reliable.

Provided are a nonaqueous electrolyte solution having improved durability properties in terms of cycling, storage and the like and improved discharge characteristic at a high current density, and a nonaqueous electrolyte battery that uses that nonaqueous electrolyte solution. The nonaqueous electrolyte solution containing a lithium salt and a nonaqueous solvent that dissolves the lithium salt, wherein the nonaqueous electrolyte solution contains a compound represented by formula (1) and at least one compound selected from the group consisting of a compound having a cyano group, a cyclic ester compound having a sulfur atom and a compound having an isocyanate group.

Provided are an electrolyte, an anode and a battery capable of improving the efficiency of precipitation and dissolution of Li, and cycle characteristics. A metal sheet (12A) which is made of Cu and does not contain Li is used as the anode (12) to deposit Li metal. An aromatic compound having an —OX group (X is H or alkali metal) such as catechol is added to an electrolytic solution (16) and a precipitation film (12C) is deposited on the surface thereof with Li metal in the initial charge. The precipitation film (12C) prevents a dendrite growth of Li and a reaction between Li and the electrolytic solution (16).

An all-solid-state thin-film battery according to an aspect of the present disclosure includes: a solid electrolyte layer; a cathode active material layer; a cathode current collector layer including a first portion and a second portion; an anode terminal layer; and an anode layer including a third portion and a fourth portion. The first contact surface between the solid electrolyte layer and the cathode active material layer, the second contact surface between the solid electrolyte layer and the first portion of the cathode current collector layer, and the third contact surface between the third portion of the anode layer and the anode terminal layer are located within a single plane.

A nonaqueous electrolyte composition includes: a nonaqueous solvent; an electrolyte salt; a matrix resin; a filler; and a surfactant.

Provided are a battery cooling device utilizing intake air or exhaust gas of an engine, a battery having a cooling device attached to it, and a vehicle mounted with the battery cooling device and an engine. The battery cooling device has a battery housing chamber capable of housing a battery and filled with refrigerant, a turbine to be rotated by exhaust gas of the engine, and a refrigerant flow part including a compressor, a heat exchanger a pipe, etc.

Disclosed is a lithium secondary battery which is excellent in battery characteristics such as long-term cycle characteristics, capacity and shelf life characteristics. Also disclosed is a nonaqueous electrolyte solution which can be used for such a lithium secondary battery. Specifically disclosed is a nonaqueous electrolyte solution for lithium secondary batteries obtained by dissolving an electrolyte salt in a nonaqueous solvent which is characterized by containing 0.01-10% by weight of a carboxylate compound represented by the general formula (I) below and 0.01-10% by weight or 0.01-10% by volume of a vinylene carbonate and/or 1,3-propane sultone. Also disclosed is a lithium secondary battery using such a nonaqueous electrolyte solution. (In the formula, R² represents a hydrogen atom or COOR³ group, R¹ and R³ respectively represent an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group or a phenyl group, and X represents an alkynylene group or an alkenylene group.)

The invention provides a lithium-ion secondary battery, a negative electrode for the same and a battery. The lithium-ion secondary battery includes a positive electrode, a negative electrode containing an active material, and an electrolytic solution, in which the active material contains, as constituent elements, Si, O, and at least one element Ml selected from Li, C, Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K, and the atomic ratio x (O/Si) of O to Si is 0.5<=x<=1.8.

The present invention provides a highly-reliable non-aqueous electrolyte secondary battery excellent in safety. The non-aqueous electrolyte secondary battery includes an electrode group, a non-aqueous electrolyte and a case accommodating the electrode group and the non-aqueous electrolyte. The non-aqueous electrolyte contains a specific bromine compound having an aromatic ring.

This invention provides a titanic acid compound-type electrode active material having a high battery capacity and, at the same time, having excellent cycle characteristics. The titanic acid compound exhibits an X-ray diffraction pattern corresponding to a bronze-type titanium dioxide except for a peak for a (200) plane and having a peak intensity ratio between the (001) plane and the (200) plane,i.e., I(200)/I(001), of not more than 0.2. The titanic acid compound may be produced by heat dehydrating H2Ti3O7 at a temperature in the range of 200 to 330 DEG C, by heat dehydrating H2Ti4O9 at a temperature in the range of 250 to 650 DEG C, or by heat dehydrating H2Ti5O11at a temperature in the range of 200 to 600 DEG C.