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:
A non-aqueous electrolyte secondary battery has a positive electrode (1), a negative electrode (2), and a non-aqueous electrolyte. The positive electrode has a positive electrode mixture layer containing a positive electrode active material, a binder agent, and a conductive agent. The positive electrode active material in the positive electrode mixture layer contains an olivine-type 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 x is 0
摘要:
As a negative electrode active material, carbon materials such as natural graphite, artificial graphite, non-graphitized carbon, and cork (charcoal) can be used. Further, a negative electrode comprises an active material layer including a group of particulate negative electrode active materials, and nickel is carried on a surface of the active material layer. Examples of a method of carrying nickel on a negative electrode surface include a method by coating, an evaporation method, and a method of bringing nickel ions into existence in a non-aqueous electrolyte to deposit nickel on a negative electrode surface. The amount of nickel added to the non-aqueous electrolyte is not less than 0.0008 mol/1 nor more than 0.007 mol/1.
摘要:
In a non-aqueous electrolyte secondary battery employing an olivine-type lithium phosphate as a positive electrode active material, power regeneration performance is improved. The non-aqueous electrolyte secondary battery for use as a power source for regenerative charging includes: a positive electrode including a mixture layer containing a positive electrode active material, a binder agent, and a carbon material as a conductive agent; a negative electrode; and a non-aqueous electrolyte. The mixture layer contains, as the positive electrode active material, an olivine-type lithium phosphate represented by the formula LiMPO4, where M is at least one element selected from the group consisting of Co, Ni, Mn, and Fe, and the mixture layer further contains a metal oxide such as a lithium-containing transition metal oxide containing at least Ni or Mn.
摘要:
As a negative electrode active material, carbon materials such as natural graphite, artificial graphite, non-graphitized carbon, and cork (charcoal) can be used. Further, a negative electrode comprises an active material layer including a group of particulate negative electrode active materials, and nickel is carried on a surface of the active material layer. Examples of a method of carrying nickel on a negative electrode surface include a method by coating, an evaporation method, and a method of bringing nickel ions into existence in a non-aqueous electrolyte to deposit nickel on a negative electrode surface. The amount of nickel added to the non-aqueous electrolyte is not less than 0.0008 mol/1 nor more than 0.007 mol/1.
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
摘要:
A non-aqueous electrolyte secondary battery has a positive electrode (1), a negative electrode (2), and a non-aqueous electrolyte. The positive electrode has a positive electrode mixture layer containing a positive electrode active material, a binder agent, and a conductive agent. The positive electrode active material in the positive electrode mixture layer contains an olivine-type 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 x is 0
摘要翻译:非水电解质二次电池具有正极(1),负极(2)和非水电解质。 正极具有包含正极活性物质,粘合剂和导电剂的正极合剂层。 正极合剂层中的正极活性物质含有以通式Li x MPO 4 N表示的橄榄石型含锂金属磷酸盐,其中M为至少 一种选自Co,Ni,Mn和Fe的元素,x是0
摘要:
It is an object of the present invention to provide a non-aqueous electrolyte secondary cell that is excellent in high-temperature preservation characteristics and in which an increase in the cell thickness is inhibited. The object is accomplished by the following structure. A non-aqueous electrolyte secondary cell having: a positive electrode; a negative electrode; a non-aqueous electrolyte having a non-aqueous solvent and an electrolytic salt; and an outer casing for housing the positive electrode, the negative electrode, and the non-aqueous electrolyte. The non-aqueous solvent has propylene carbonate at from 10 to 60 volume %. The non-aqueous electrolyte further has, as well as the non-aqueous solvent, vinyl acetate at from 0.3 to 3.0 mass % and vinyl ethylene carbonate at from 1.0 to 3.5 mass %.