摘要:
A non-aqueous electrolyte secondary battery that is an exemplary embodiment of the present invention, wherein a positive electrode contains a lithium-transition metal composite oxide containing Ni, Al and Sr as a positive electrode active substance. In the lithium-transition metal composite oxide, the content of Ni is 80-95 mol %, the content of Al is 8.0 mol % or less, the content of Sr is 1.2 mol % or less, and the proportion of metallic elements other than Li that are present in a Li layer is 0.5-2.0 mol %. A negative electrode has a Sr-containing coating film formed on a surface of a negative electrode mixture layer. The content of Sr in the coating film is 20-400 ppm relative to the total mass of the negative electrode mixture layer and the coating film.
摘要:
There is provided a positive electrode for nonaqueous electrolyte secondary batteries in which a decrease in the initial discharge voltage can be suppressed even when a positive electrode exposed to the air is used. The positive electrode for a nonaqueous electrolyte secondary battery according to an aspect of the present invention contains a lithium transition metal oxide constituted by a secondary particle formed by aggregation of primary particles. A rare-earth compound adheres to at least part of a surface of the secondary particle, and a compound containing lithium and boron adheres to at least part of the surface of the secondary particle and at least part of an interface between primary particles aggregated at the surface of the secondary particle.
摘要:
A nonaqueous electrolyte secondary battery that releases a reduced amount of gas when stored in a highly charged state at high temperatures, including a positive electrode containing a positive electrode active material capable of storing and releasing lithium ions, a negative electrode containing a negative electrode active material capable of storing and releasing lithium ions, and a nonaqueous electrolyte, wherein the positive electrode active material includes secondary particles formed by the aggregation of primary particles including a lithium transition metal oxide containing lithium, cobalt, nickel, manganese and aluminum, the secondary particles have on the surface thereof a recess formed between the primary particles adjacent to one another and a compound containing boron and oxygen is attached to the recess, and the proportion of cobalt in the lithium transition metal oxide is not less than 80 mol % relative to the total molar amount of the metal elements except lithium.
摘要:
This positive electrode active material for nonaqueous electrolyte secondary batteries contains: first particles which have an average surface roughness of 4% or less and are mainly configured of a lithium-nickel composite oxide wherein the ratio of Ni relative to the total number of moles of metal elements other than Li is more than 30% by mole; and second particles which are present on the surfaces of the first particles and are mainly configured of at least one hydroxide selected from among hydroxides of lanthanoid elements (excluding La and Ce) and oxyhydroxides.
摘要:
In a nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution contains a nitrile compound having a chain saturated hydrocarbon group and a nitrile group, the number of carbon atoms in the nitrile compound is four or more, and the positive electrode contains a positive-electrode active material on the surface of which particles of a rare earth element compound are deposited in dispersed form.
摘要:
A positive electrode active material for nonaqueous electrolyte secondary batteries is provided with which increased DCR after cycling can be controlled. A positive electrode active material according to an aspect of the present invention is secondary particles of a lithium transition metal oxide formed through the aggregation of primary particles of the oxide, the lithium transition metal oxide containing at least Ni. Secondary particles of a rare earth compound formed through the aggregation of particles of the rare earth compound are adhering to depressions each created between adjacent two of the primary particles on the surfaces of the secondary particles. The secondary particles of the rare earth compound are adhering to both of the two adjacent primary particles at the depressions.
摘要:
A positive electrode for nonaqueous electrolyte secondary batteries and a nonaqueous electrolyte secondary battery are provided with which loss of initial efficiency can be limited even if a positive electrode exposed to air is used. An aspect of a positive electrode according to the present invention for nonaqueous electrolyte secondary batteries is a positive electrode for nonaqueous electrolyte secondary batteries incorporating a lithium transition metal oxide, wherein the positive electrode for nonaqueous electrolyte secondary batteries contains a tungsten compound and a boron compound. It is particularly preferred that the tungsten compound be a tungsten-containing oxide.
摘要:
A positive electrode active material for a nonaqueous electrolyte secondary battery having excellent low-temperature output characteristics and a nonaqueous electrolyte secondary battery using the same are provided. According to an aspect of the positive electrode active material for a nonaqueous electrolyte secondary battery of the present invention, a compound containing a rare earth element and a compound containing lithium and fluorine are attached to a surface of a positive electrode active material formed of a lithium transition metal oxide. The compound containing a rare earth element attached to the surface of the positive electrode active material is preferably at least one selected from a hydroxide, an oxyhydroxide, a phosphate compound, a carbonate compound, and an oxide.
摘要:
A positive electrode for a nonaqueous electrolyte secondary battery, the positive electrode being configured so that even if the potential of the positive electrode is set to a high potential, degradation of cycle characteristics is suppressed. A positive electrode for a nonaqueous electrolyte secondary battery, which has a positive electrode plate in which a positive electrode mixture layer containing a positive electrode active material which occludes and releases Li, a binder, and an electrically conductive agent is formed on a positive electrode collector, and in this positive electrode, a compound containing at least one element selected from W, Al, Mg, Ti, Zr, and a rare earth element is adhered to all the surfaces of at least a part of the positive electrode active material, at least a part of the binder, and at least a part of the electrically conductive agent, each of which is contained in the positive electrode mixture layer.
摘要:
An object is to provide a positive electrode for a non-aqueous electrolyte secondary battery and a non-aqueous electrolyte secondary battery that allow a high output characteristic. Included are a positive electrode collector and a positive electrode mixture layer formed on at least one surface of the positive electrode collector. The positive electrode mixture layer contains particles 3 of lithium nickel cobalt manganese oxide represented by LiNi0.55Co0.20Mn0.25O2, erbium oxyhydroxide 1 fixed on the surfaces of the particles of the lithium nickel cobalt manganese oxide 3, tungsten trioxide 2 adhering to the surfaces of the particles of the lithium nickel cobalt manganese oxide 3, and a binder.