41results about How to "Excellent input and output characteristics" patented technology

Secondary batteries for automobiles require good input / output characteristics and low internal resistance. Although there is a conventional technique wherein the surface of an active material is coated with metal particles for the purpose of reducing the internal resistance of a battery, the technique cannot achieve remarkable effects on improvement in the conductivity of the active material or decrease in the internal resistance of the battery since an oxide film is formed on the metal particle surfaces. Disclosed is an electrode material which is produced by mixing and dispersing an active material and a metal source compound, and then depositing metal particles on the surface of the active material by thermal decomposition, vapor phase reduction, liquid phase reduction or a chemical reaction combining any of the thermal decomposition, vapor phase reduction and liquid phase reduction. Since an oxide film is not formed on the metal particles, an electrode material having high conductivity can be obtained. The electrode material can have significant effects on decrease in the internal resistance of a battery and improvement in the input / output characteristics of a battery.

Disclosed is a resin composition for a lithium ion cell positive electrode that imparts strong adhesiveness and electrolyte injectability and shows good charge-discharge properties and input-output properties. The resin composition for a lithium ion cell positive electrode is a resin composition for a lithium ion cell positive electrode comprising a polyimide precursor having an average thermal linear expansion coefficient under from 20 to 200 DEG C after imidation of 3 to 50 ppm and / or a polyimide having an average thermal linear expansion coefficient under from 20 to 200 DEG C of 3 to 50 ppm, as well as a positive electrode active substance, wherein the electrode active substance is one where the surface of a compound oxide comprising lithium is coated by a lithium ion conductor material.

According to one embodiment, an electrode includes a current collector, an active material-containing layer, a first peak, a second peak and a pore volume. The active material-containing layer contains an active material having a lithium absorption potential of 0.4 V (vs. Li / Li+) or more. The first peak has a mode diameter of 0.01 to 0.1 mum in a diameter distribution of pores detected by mercury porosimetry. The second peak has a mode diameter of 0.2 mum (exclusive) to 1 mum (inclusive) in the diameter distribution of pores. The pore volume detected by the mercury porosimetry is within a range of 0.1 to 0.3 mL per gram of a weight of the electrode excluding a weight of the current collector.

A cathode material for a lithium-ion secondary battery of the present invention includes central particles represented by LixAyMzPO4 and a carbonaceous film that coats surfaces of the central particles, an average value of R values (I1580 / I1360), which are ratios of a peak intensity (I1580) of a spectrum at a frequency band of 1,580±50 cm−1 to a peak intensity (I1360) of the spectrum at a frequency band of 1,360±50 cm−1 in a Raman spectrum analysis, measured at five points is 0.80 or more and 1.10 or less, and a standard deviation of the R values measured at five points is 0.010 or less.

The present invention provides a non-aqueous electrolyte battery having excellent input-output characteristics at a large current, a battery pack including the non-aqueous electrolyte battery, and an automobile. The non-aqueous electrolyte battery comprises: a positive electrode (3); a negative electrode (4), the negative electrode comprising a negative electrode active material with a Li insertion potential greater than or equal to 0.4V (vs. Li / Li+); configured on the positive electrode (3) and the negative electrode The diaphragm (5) between (4) has a porosity greater than or equal to 50% as measured by the mercury intrusion method, and the median diameter of the voids measured by the mercury intrusion method is larger than the mode diameter, and the above-mentioned a surface roughness of the negative electrode larger than the above-mentioned mode diameter; and a nonaqueous electrolyte.

The purpose of this invention is to provide, among other things, a carbonaceous material for a negative electrode of a nonaqueous-electrolyte secondary battery, said carbonaceous material having a high volumetric energy density and excellent cycle characteristics. This negative-electrode material for a nonaqueous-electrolyte secondary battery comprises, as an active material, a carbon-material mixture that contains a plurality of non-graphitic carbon materials. The true density (rouBt) of said carbon-material mixture, as determined using a butanol method, is between 1.60 and 2.05 g / cm<3>, inclusive; the atomic ratio of hydrogen to carbon (H / C) in the carbon-material mixture, as per elemental analysis, is no more than 0.10; and the discharge capacity of the carbon-material mixture at 0 to 0.1 V relative to a lithium reference electrode is between 80 and 230 mAh / g, inclusive.

A positive active material for a lithium-ion secondary battery includes a lithium composite oxide particle containing nickel atoms, manganese atoms, and fluorine atoms. The lithium composite oxide particle includes a particle center portion and a surface layer portion that is closer to a surface of the lithium composite oxide particle than the particle center portion is. A fluorine atom concentration Fc (at %) of the particle center portion measured by energy dispersive X-ray spectroscopy is lower than a fluorine atom concentration Fs (at %) of the surface layer portion.

A negative electrode of a lithium ion secondary battery of the present invention includes a current collector (32) and a negative electrode active material layer (34) provided on the current collector (32). In the negative electrode of a lithium ion secondary battery, the negative electrode active material layer (34) includes carbon particles, a degree of graphitization of the carbon particles is 1.0 or more and 1.5 or less and a degree of orientation of the carbon particles is 50 or more and 150 or less; where, the degree of graphitization is a ratio (P101 / P100) between a peak intensity P101 of the (101) plane and a peak intensity P100 of the (100) plane in an X-ray diffraction pattern and the degree of orientation is a ratio (P002 / P110) between a peak intensity P002 of the (002) plane and a peak intensity P110 of the (110) plane in an X-ray diffraction pattern.

This invention discloses a method for optimizing RF power amplifier including: a power amplifier receives an actual working frequency point to adjust the performance parameters of the power amplifier. This invention discloses a RF power amplifier system, which gets information of actual working frequency points by a baseband then to be transmitted to a power amplifying control unit of the power amplifier via an interface circuit, in which, the power amplifying control unit determines the most suitable working performance parameter based on the point information to optimize the input and output property of the power amplifier.

A manufacturing method of a lithium ion secondary battery includes: forming a first mixture by mixing powder of a first electrode material, which is one of the active material and the conductive material, with powder of trilithium phosphate; forming a second mixture by mixing the first mixture with powder of a second electrode material which is the other one of the active material and the conductive material; forming a wet granulated body by mixing the second mixture with the binder and a solvent; and forming the active material layer by attaching the wet granulated body to the surface of the current collector foil.

The present invention relates to an electrode, a nonaqueous electrolyte battery and a battery pack. To provide electrodes, non-aqueous electrolyte batteries and battery packs with improved input and output characteristics. According to an embodiment, an electrode including a current collector and an active material-containing layer formed on the current collector is provided. The Li insertion potential of the active material is 0.4 V (vs. Li / Li+) or more. In the pore size distribution measured by mercury porosimetry, there are a first peak having a mode diameter of 0.01 μm to 0.1 μm and a second peak having a mode diameter of more than 0.2 μm and 1 μm or less. The volume of the pores measured by the mercury intrusion porosimetry is 0.1 mL to 0.3 mL per 1 g of the electrode weight (the weight excluding the current collector).

The present invention provides an electrode of a non-aqueous electrolyte battery capable of exhibiting excellent input-output characteristics in a highly charged state. According to one embodiment, an electrode is provided. The electrode contains the first composite oxide of orthorhombic crystal-type Na-niobium-titanium composite oxide and the general formula Li 2+a Na 2+b Ti 6 o 14 The second composite oxide represented by (-0.2≤a≤2, -0.2≤b≤0.2).

A lithium secondary battery 10 of the present invention is a secondary battery provided with a positive electrode 30 having a positive electrode active material layer 34 on a positive electrode collector 32, and a negative electrode 50 having a negative electrode active material layer 54 on a negative electrode collector 52. The positive electrode active material layer 34 contains a positive electrode active material capable of reversibly storing and releasing lithium ions. The negative electrode active material layer 54 contains a negative electrode active material made up of lamellar graphite that is bent so as to have an average number of bends f per particle of 0<f≦3, and an average aspect ratio of 1.8 or higher. In a cross-section perpendicular to the surface of the negative electrode collector 52, the negative electrode active material is oriented in such a manner that the perpendicularity defined as n2 / n1, is 1 or greater, n1 being the number of negative electrode active material units such that 0°≦θn≦30°, and n2 being the number of negative electrode active material units such that 60°≦θn≦90°, where θn is the angle formed by a major axis of the negative electrode active material units with respect to the surface of the negative electrode collector 52.

The present invention provides an active material for a battery capable of realizing a nonaqueous electrolyte battery exhibiting excellent input / output characteristics, excellent life characteristics, and high voltage. The battery active material according to one embodiment of the present invention contains the general formula Li (2+w) Na (2‑x) M1 (x / 2) Ti (6‑y) M2 z o 14 Indicated titanium-containing oxides. M1 is at least one metal element selected from Sr, Ba, and Pb. M2 is at least one element selected from metal elements M (excluding Ti and M1) and P.