Abstract:
A non-aqueous electrolyte solution that contains an organic solvent, and a lithium salt and an electrolyte, that is useful for the preparation of a secondary battery that is equipped with a negative electrode and a positive electrode, each of which is capable of storing and releasing lithium, wherein the non-aqueous electrolyte solution contains partially hydrogenated terphenyl that is a mixture of two or more compounds of which one is diphenylcyclohexane that is present in an amount ranging from 10 to 65 wt % of the partially hydrogenated terphenyl and the partially hydrogenated terphenyl has a solubility of not less than 0.5 wt % in the electrolyte solution at room temperature.
Abstract:
A layered lithium-nickel-based compound oxide powder for a positive electrode material for a high density lithium secondary cell, capable of providing a lithium secondary cell having a high capacity and excellent in the rate characteristics also, is provided. A layered lithium-nickel-based compound oxide powder for a positive electrode material for a lithium secondary cell, characterized in that the bulk density is at least 2.0 g/cc, the average primary particle size B is from 0.1 to 1 μm, the median diameter A of the secondary particles is from 9 to 20 μm, and the ratio A/B of the median diameter A of the secondary particles to the average primary particle size B, is within a range of from 10 to 200. In production of a layered lithium-nickel-based compound oxide powder, which comprises spray drying a slurry having a nickel compound and a transition metal element compound capable of substituting lithium other than nickel, dispersed in a liquid medium, followed by mixing with a lithium compound, and firing the mixture, the spray drying is carried out under conditions of 0.4≦G/S≦4 and G/S≦0.0012 V, when the slurry viscosity at the time of the spray drying is represented by V (cp), the slurry supply amount is represented by S (g/min) and the gas supply amount is represented by G (L/min).
Abstract:
A lithium-transition metal compound powder for a positive-electrode material of lithium secondary batteries can include a lithium-transition metal compound that is capable of an insertion and elimination of lithium ions. The particles in the powder contain, in the inner part thereof, a compound that, when analyzed by an SEM-EDX method, has peaks derived from Group-16 elements belonging to the third or later periods of the periodic table and Group-5 to Group-7 elements belonging to the fifth and sixth periods of the periodic table.
Abstract:
There is provided a powder of a lithium transition-metal compound for a positive-electrode material in a lithium secondary battery, in which the use of the powder as that of a positive-electrode material in a lithium secondary battery achieves a good balance among improvement in battery performance, cost reduction, resistance to a higher voltage, and a higher level of safety. The powder of the lithium transition-metal compound for a positive-electrode material in a lithium secondary battery is characterized in that in a mercury intrusion curve obtained by mercury intrusion porosimetry, the amount of mercury intruded is in the range of 0.8 cm3/g to 3 cm3/g when the pressure is increased from 3.86 kPa to 413 MPa.
Abstract:
The invention relates to: a lithium-transition metal compound powder for a positive-electrode material of lithium secondary batteries, which is a powder that comprises a lithium-transition metal compound having a function of being capable of an insertion and elimination of lithium ions, wherein the particles in the powder contain, in the inner part thereof, a compound that, when analyzed by an SEM-EDX method, has peaks derived from at least one element selected from the Group-16 elements belonging to the third or later periods of the periodic table and at least one element selected from the Group-5 to Group-7 elements belonging to the fifth and sixth periods of the periodic table; a process for producing the powder; a positive electrode for lithium secondary batteries; and a lithium secondary battery.
Abstract:
The invention relates to a lithium-transition metal compound powder for a positive-electrode material for lithium secondary battery which comprises secondary particles configured of primary particles having two or more compositions and a lithium-transition metal compound having a function of being capable of insertion and release of lithium ions, wherein the powder gives a pore distribution curve having a peak at a pore radium 80 nm or greater but less than 800 nm, and the secondary particles include primary particles of a compound represented by a structural formula including at least one element selected from As, Ge, P, Pb, Sb, Si and Sn, wherein the primary particles of the compound are present at least in an inner part of the secondary particles.
Abstract:
A layered lithium-nickel-based compound oxide powder for a positive electrode material for a high density lithium secondary cell, capable of providing a lithium secondary cell having a high capacity and excellent in the rate characteristics also, is provided.A layered lithium-nickel-based compound oxide powder for a positive electrode material for a lithium secondary cell, characterized in that the bulk density is at least 2.0 g/cc, the average primary particle size B is from 0.1 to 1 μm, the median diameter A of the secondary particles is from 9 to 20 μm, and the ratio A/B of the median diameter A of the secondary particles to the average primary particle size B, is within a range of from 10 to 200. In production of a layered lithium-nickel-based compound oxide powder, which comprises spray drying a slurry having a nickel compound and a transition metal element compound capable of substituting lithium other than nickel, dispersed in a liquid medium, followed by mixing with a lithium compound, and firing the mixture, the spray drying is carried out under conditions of 0.4≦G/S≦4 and G/S≦0.0012V, when the slurry viscosity at the time of the spray drying is represented by V (cp), the slurry supply amount is represented by S (g/min) and the gas supply amount is represented by G (L/min).
Abstract:
A powder of a layered lithium-nickel-manganese-cobalt composite oxide for use as a positive-electrode material for lithium secondary battery is provided which, when used as a positive-electrode material for lithium secondary battery, enables a cost reduction and higher safety to be reconciled with improved battery performances. The powder of a layered lithium-nickel-manganese-cobalt composite oxide for use as a positive-electrode material for lithium secondary battery is composed of secondary particles formed by the aggregation of primary particles. It has a composition represented by the following formula (I), has a volume resistivity of 5×105 Ω·cm or lower in the state of being compacted at a pressure of 40 MPa, and has a value of C/S, wherein C is the concentration of carbon contained therein (% by weight) and S is the BET specific surface area thereof (m2/g), of 0.025 or smaller. The powder has been regulated so as to have a volume resistivity not higher than the specified value and a considerably reduced carbon content while having a composition in a limited range, whereby a cost reduction and higher safety can be reconciled with improved battery performances. Li1+zNixMnyCo1−x−yOδ (I) (0
Abstract translation:提供了用作锂二次电池的正极材料的分层锂镍锰钴复合氧化物粉末,其用作锂二次电池的正极材料时,能够降低成本并提高安全性 与电池性能提高相协调。 用作锂二次电池正极材料的层状锂镍锰钴复合氧化物粉末由通过一次粒子聚集而形成的二次粒子构成。 其具有由下式(I)表示的组成,在40MPa的压力下被压实的状态下的体积电阻率为5×10 5Ω·cm以下,并且具有 C / S,其中C是其中所含的碳的浓度(重量%),S是其BET比表面积(m 2 SUP / g),为0.025或更小。 该粉末被调节成具有不高于规定值的体积电阻率并且具有显着降低的碳含量,同时具有在有限范围内的组成,由此可以与改进的电池性能相一致地降低成本和更高的安全性。 <?in-line-formula description =“In-line Formulas”end =“lead”?> Li 1 + z i> sub> (I)<?in-line-formula description =“In-line Formulas”end =“tail”?>(0
Abstract:
A nonaqueous electrolyte secondary cell, wherein a lithium-containing metal oxide capable of binding and releasing lithium is used as a positive electrode, and a nonaqueous electrolyte containing a lithium salt is used as an electrolyte, in which a spinel type lithium manganese oxide which satisfies the formula:Li�Mn.sub.2-x Li.sub.x !O.sub.4-.delta.wherein 0.ltoreq.x.ltoreq.0.05, and -0.025.ltoreq..delta..ltoreq.0.050, and wherein the average valency of Mn is within a range of from 3.501 to 3.535, is used as the lithium-containing metal oxide.
Abstract:
A positive electrode material for a lithium secondary cell, which contains a spinel-type lithium manganese oxide having a crystal structure belonging to Fd3m (No. 227), wherein the lithium manganese oxide satisfies the following formula:Li(Mn.sub.2-x-y Li.sub.x M.sub.y)O.sub.4-.delta.-z A.sub.zwherein M is at least one metal element substitutable at Mn (16d) sites, other than Mn and Li, A is a halogen atom, x is from 0.01 to 0.10, y is a positive number, z is from 0 to 0.2, and .delta. represents a quantity of oxygen deficiency, and the average valency a of Mn is from 3.501 to 3.635.
Abstract translation:一种锂二次电池用正极材料,其含有具有属于Fd + E的结晶结构的尖晶石型锂锰氧化物,ov 3+ EE m(227号),其中,所述锂锰氧化物满足下式: Li(Mn2-x-yLixMy)O4-δ-zAz其中M是Mn(16d)位置以外的至少一种金属元素,除Mn和Li以外,A为卤素原子,x为0.01至0.10,y为 正数,z为0〜0.2,δ表示氧缺乏量,Mn的平均化合价a为3.501〜3.635。