摘要:
A battery capable of improving battery characteristics such as cycle characteristics is provided. The battery includes a spirally wound electrode body including a cathode and an anode spirally wound with a separator in between. The capacity of the anode includes a capacity component by insertion and extraction of light metal and a capacity component by precipitation and dissolution of the light metal, and is represented by the sum of them. The separator is impregnated with an electrolyte solution formed through dissolving a lithium salt in a solvent. As the electrolyte salt, difluoronulloxalato-O,Onullnulllithium borate, tetrafluoronulloxalato-O,Onullnulllithium phosphate or difluorobisnulloxalato-O,Onullnulllithium phosphate is used. By the formation of a stable coating, decomposition of the solvent and a reaction between precipitated lithium metal and the solvent can be prevented.
摘要:
The object of the invention is to provide positive electrode material in which a discharge rate characteristic and battery capacity are hardly deteriorated in the environment of low temperature of null30null C., its manufacturing method and a lithium secondary battery using the positive electrode material. The invention is characterized by the positive electrode material in which plural primary particles are flocculated and a secondary particle is formed, and the touch length of the primary particles is equivalent to 10 to 70% of the length of the whole periphery on the section of the touched primary particles.
摘要:
A positive active material for lithium secondary batteries is provided with which a lithium secondary battery having a high energy density and excellent charge/discharge cycle performance can be obtained. Also provided is a lithium secondary battery having a high energy density and excellent charge/discharge cycle performance. The positive active material for lithium secondary batteries is characterized by comprising a composite oxide which is represented by the composite formula LixMnaNibCocO2 (wherein a, b, and c are values within such a range that in a ternary phase diagram showing the relationship among these, (a, b, c) is present on the perimeter of or inside the quadrilateral ABCD defined by point A (0.5, 0.5, 0), point B (0.55, 0.45, 0), point C (0.55, 0.15, 0.30), and point D (0.15, 0.15, 0.7) as vertexes, and 0.95
摘要:
A positive electrode active material for lithium-ion rechargeable batteries of general formula Li1nullxNinullMnnullAnullO2 and further wherein A is Mg, Zn, Al, Co, Ga, B, Zr, or Ti and 0
摘要:
An active material for positive electrode for a non-aqueous electrolyte secondary battery comprises a lithium-metal composite oxide that is expressed by the general formula of Lix(Ni1-yCoy)1-zMzO2 (where 0.98nullxnull1.10, 0.05nullynull0.4, 001nullznull0.2, and where M is at least one metal element selected from the group of Al, Mg, Mn, Ti, Fe, Cu. Zn and Ga), and where the SO4 ion content is in the range from 0.4 weight % to 2.5 weight %, and the occupancy rate of lithium found from the X-ray diffraction chart and using Rietveld analysis is 98% or greater, and the carbon amount measured by way of the high frequency heating-infrared adsorption method is 0.12 weight % or less, and that the Karl Fischer water content due to heating at 180null C. be 0.2 weight % or less.
摘要翻译:用于非水电解质二次电池的正极活性材料包括由通式Lix(Ni1-yCoy)1-zMzO2表示的锂金属复合氧化物(其中0.98 <= x <= 1.10,0.05 < = y <= 0.4,001 <= z <= 0.2,其中M是选自Al,Mg,Mn,Ti,Fe,Cu,Zn和Ga中的至少一种金属元素,并且其中SO 4离子 含量在0.4重量%至2.5重量%的范围内,并且从X射线衍射图和使用Rietveld分析发现的锂的占有率为98%以上,通过高频加热测量的碳量 - 红外吸收法为0.12重量%以下,由于180℃下加热引起的卡尔费休含水量为0.2重量%以下。
摘要:
A zinc/air cell having thin walled cup shaped anode casing and cathode casing. The cell may be a button cell having an anode comprising zinc and a cathode, which may be catalytic, comprising manganese dioxide. The anode and cathode casings have small wall thicknesses, preferably between 2 and 5 mil (0.0508 and 0.127 mm), desirably between about 2 and 3 mil (0.0508 and 0.0762 mm). There is an insulating seal ring covering at least a portion of the anode casing side walls. During cell assembly the cathode casing side wall is pushed over at least a portion of the anode casing side wall with insulating sealing disk therebetween. A tight interference fit is achieved with the outside diameter of the anode casing plus insulating seal thereon being preferably between about 2 and 4.5 mil (0.0508 and 0.114 mm) greater than the inside diameter of the cathode casing. This reduces the tendency of the casing side walls to spring back after crimping.
摘要:
As a positive electrode active material, a lithium transition metal complex oxide having a layered rock-salt structure containing lithium (Li) and containing magnesium atoms (Mg) substituted for part of lithium atoms (Li) is used. The lithium transition metal complex oxide is formed by chemical or electrochemical substitution of Mg atoms for part of Li atoms in LiCoO2, LiMnO2, LiFeO2, LiNiO2, or the like. A cell is prepared in which a negative electrode 2 and a positive electrode 1 including the lithium transition metal complex oxide (positive electrode active material) are disposed in a non-aqueous electrolyte 5 including a lithium salt, and part of Li in the lithium transition metal complex oxide is extracted by discharging the cell. Then, the electrolyte including Li is replaced with an electrolyte including Mg; and the cell is discharged, so that Mg atoms are substituted for the part of Li atoms in the lithium transition metal complex oxide.
摘要:
A method of forming an electrochemical cell is disclosed. The method comprises contacting a negative pole layer and a positive pole layer one with the other or with an optional layer interposed therebetween. The pole layers and the optional layer therebetween are selected so as to self-form an interfacial separator layer between the pole layers upon such contacting.
摘要:
The present invention relates to a lithium secondary battery comprising an overdischarge-preventing agent. Particularly, the present invention provides a lithium secondary battery comprising an overdischarge-preventing agent having superior effects for an overdischarge test and showing 90% or more capacity recovery after the test, by introducing lithium nickel oxide into a cathode for a lithium secondary battery comprising a lithium transition metal oxide capable of occluding and releasing lithium ions as an overdischarge-preventing agent to supply lithium ions such that irreversible capacity of an anode can be compensated or better, thereby lowering voltage of a cathode first to prevent voltage increase of an anode during the overdischarge test.