摘要:
A positive electrode active material capable of improving an output performance of a nonaqueous electrolyte secondary battery is provided. A positive electrode active material of a nonaqueous electrolyte secondary battery 1 contains a first positive electrode active material and a second positive electrode active material. In the first positive electrode active material, the content of cobalt is 15% or more on an atomic percent basis in transition metals. In the second positive electrode active material, the content of cobalt is 5% or less on an atomic percent basis in transition metals. An average secondary particle diameter r1 of the first positive electrode active material is smaller than an average secondary particle diameter r2 of the second positive electrode active material.
摘要:
A positive-electrode active material of a nonaqueous electrolyte secondary battery is modified to improve the output characteristics under various temperature conditions, thereby making the nonaqueous electrolyte secondary battery suitable for a power supply for hybrid vehicles. The nonaqueous electrolyte secondary battery includes a working electrode 11, a counter electrode 12 containing a negative-electrode active material, and a nonaqueous electrolyte solution 14. In the working electrode 11, a positive-electrode mixture layer containing a granular positive-electrode active material and a binder is disposed on both sides of a positive-electrode collector. The positive-electrode active material contains a lithium transition metal oxide Li1.07Ni0.46Co0.19Mn0.28O2 and a tungsten trioxide attached to part of the surface of the lithium transition metal oxide.
摘要:
A positive electrode active material capable of improving an output performance of a nonaqueous electrolyte secondary battery is provided. A positive electrode active material of a nonaqueous electrolyte secondary battery 1 contains a first positive electrode active material and a second positive electrode active material. In the first positive electrode active material, the content of cobalt is 15% or more on an atomic percent basis in transition metals. In the second positive electrode active material, the content of cobalt is 5% or less on an atomic percent basis in transition metals. An average secondary particle diameter r1 of the first positive electrode active material is smaller than an average secondary particle diameter r2 of the second positive electrode active material.
摘要:
The present invention is aimed at providing a nonaqueous electrolyte secondary battery capable of improving cycling characteristics by improving a positive electrode active material when particles with a structure in which primary particles are aggregated to front, secondary particles are used as the positive electrode active material of the nonaqueous electrolyte secondary battery, thereby permitting preferred use as a power supply of a hybrid electric car or the like. The positive electrode active material includes secondary particles 20 composed of aggregated primary particles 21, the primary particles 21 have an aspect ratio of 2.0 or more and 10.0 or less, and in powder X-ray diffraction measurement using CuKα ray, the positive electrode active material satisfies 0.10°≦FWHM110 ≦0.30° wherein FWHM110 represents a full width at half maximum of a 110 diffraction peak present within a range of diffraction angle 2θ of 64.5°±1.0°.
摘要:
A non-aqueous electrolyte secondary battery is provided that uses as a positive electrode active material a low-cost lithium-containing transition metal composite oxide containing Ni and Mn as its main components, to improve the output power characteristics so that it can be used suitably for an electric power source for, for example, hybrid electric vehicles. A non-aqueous electrolyte secondary battery has a positive electrode (11) containing a positive electrode active material, a negative electrode (12) containing a negative electrode active material, and a non-aqueous electrolyte solution (14) in which a solute is dissolved in a non-aqueous solvent. In the positive electrode active material, Nb2O5 in which the amount of niobium is 0.5 mol % with respect to the total amount of the transition metals and TiO2 in which the amount of titanium is 0.5 mol % with respect to the total amount of the transition metals are disposed on a surface of Li1.06Ni10.56Mn10.38O2.
摘要翻译:提供一种非水电解质二次电池,其使用含有Ni和Mn作为其主要成分的低成本含锂过渡金属复合氧化物作为正极活性物质,以提高输出功率特性,使其可以适当地使用 用于例如混合动力电动车辆的电力源。 非水电解质二次电池具有含有正极活性物质的正极(11),含有负极活性物质的负极(12)和溶解有溶质的非水电解液(14) 在非水溶剂中。 在正极活性物质中,相对于过渡金属的总量,钛的含量相对于过渡金属的总量为0.5摩尔%,其中铌的量为0.5摩尔%的Nb 2 O 5 设置在Li1.06Ni10.56Mn10.38O2的表面上。
摘要:
In a nonaqueous electrolyte secondary battery including a positive electrode (11) whose surface has a positive electrode mixture layer containing a mixture of a conductive carbon material and a positive electrode active material containing a lithium-containing transition metal composite oxide having a layer structure and represented by the general formula LiaNixM(1-x)O2 (where M represents one or more kinds of elements, and a and x satisfy the conditions 0
摘要:
The electrode for the nonaqueous electrolyte secondary battery includes a current collector and an active material layer formed on the current collector and containing an active material. The active material contains first and second particulate lithium-containing transition metal oxides of different voidages.
摘要:
Provided is a method for producing an active material for a lithium secondary battery to enable efficient removal of iron impurities, which would become a problem in production of an active material for a lithium secondary battery, and attain a high quality. The method includes removing iron impurities in an active material for a lithium secondary battery by means of magnetic force. With this method, use of a magnetic force-generating device within a recess portion, which composes at least one part of the recess portion, enables efficient removal of only iron impurities. Thus, it is expected that a voltage drop caused by dissolution of iron compounds, i.e. impurities in a positive electrode, and their migration to a negative electrode in a battery, and decreases in charge and discharge efficiencies and a voltage drop owing to precipitation of lithium can be suppressed.
摘要:
In a polymer electrolyte battery provided with a positive electrode, a negative electrode, and a polymer electrolyte containing a non-aqueous electrolyte solution, a solvent in said non-aqueous electrolyte solution contains vinylene carbonate in a concentration of 0.1 to 90 vol % so that the non-aqueous electrolyte solution contained in the polymer electrolyte is restrained from reacting with the positive electrode and negative electrode.
摘要:
A non-aqueous electrolyte secondary battery has a negative electrode, a non-aqueous electrolyte, and a positive electrode containing a positive electrode active material composed of an olivine lithium-containing metal phosphate represented by the general formula LixMPO4, where M is at least one element selected from the group consisting of Co, Ni, Mn, and Fe, and 0