Abstract: A lithium transition metal based compound powder for a lithium secondary battery positive electrode material, characterized by including a lithium transition metal based compound, which has a function of enabling insertion and elimination of lithium ions, as a primary component and being produced by conducting firing after at least one type of compound (hereafter referred to as “Additive 1”) containing at least one type of element (hereafter referred to as “Additive element 1”) selected from B and Bi and at least one type of compound (hereafter referred to as “Additive 2”) containing at least one type of element (hereafter referred to as “Additive element 2”) selected from Mo and W are added in combination to a raw material of the primary component at a ratio of a total of Additive 1 and Additive 2 to a total amount of moles of transition metal elements in the raw material of the primary component of 0.01 percent by mole or more, and less than 2 percent by mole.

Abstract: A lithium transition metal-based compound powder for a lithium secondary battery positive electrode material that can achieve both improvements of load characteristics such as rate and output characteristics and a higher density is a lithium transition metal-based compound powder containing, as a main component, a lithium transition metal-based compound that has a function of allowing elimination and insertion of lithium ions, and including a crystal structure belonging to a layer structure, wherein primary particles are aggregated to form secondary particles, the ratio A/B of a median diameter A of the secondary particles to an average diameter (average primary particle diameter B) is in the range of 8 to 100, and 0.01?FWHM(110)?0.5 where FWHM(110) is the half width of a (110) diffraction peak present near a diffraction angle 2? of 64.5° in a powder X-ray diffraction analysis using a CuK? line.

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: 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 ?·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.

Abstract: A lithium transition metal based compound powder for a lithium secondary battery positive electrode material, characterized by including a lithium transition metal based compound, which has a function of enabling insertion and elimination of lithium ions, as a primary component and being produced by conducting firing after at least one type of compound (hereafter referred to as “Additive 1”) containing at least one type of element (hereafter referred to as “Additive element 1”) selected from B and Bi and at least one type of compound (hereafter referred to as “Additive 2”) containing at least one type of element (hereafter referred to as “Additive element 2”) selected from Mo and W are added in combination to a raw material of the primary component at a ratio of a total of Additive 1 and Additive 2 to a total amount of moles of transition metal elements in the raw material of the primary component of 0.01 percent by mole or more, and less than 2 percent by mole.

Abstract: A lithium transition metal-based compound powder for a lithium secondary battery positive electrode material that can achieve both improvements of load characteristics such as rate and output characteristics and a higher density is a lithium transition metal-based compound powder containing, as a main component, a lithium transition metal-based compound that has a function of allowing elimination and insertion of lithium ions, and including a crystal structure belonging to a layer structure, wherein primary particles are aggregated to form secondary particles, the ratio A/B of a median diameter A of the secondary particles to an average diameter (average primary particle diameter B) is in the range of 8 to 100, and 0.01?FWHM(110)?0.5 where FWHM(110) is the half width of a (110) diffraction peak present near a diffraction angle 2? of 64.5° in a powder X-ray diffraction analysis using a CuK? line.

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: A lithium nickel manganese cobalt complex oxide powder for a lithium secondary battery positive electrode material, which is composed of a crystal structure having a layered structure, and the composition thereof is expressed by the following formula: Li[Liz/(2+z){(LixNi(1?3x)/2Mn(1+x)/2)(1?y)Coy}2/(2+z)]O2 wherein 0.01?x?0.15, 0?y?0.35, and 0.02(1?y)(1?3x)?z?0.15(1?y)(1?3x).

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 ?·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.

Abstract: There are disclosed a non-aqueous electrolyte which comprises a non-aqueous organic solvent and a lithium salt, and further contains a compound represented by the following formula (I): wherein X represents —O—, —S—, —CO— or —SO2, Y represents a single bond, —CH2—, —CH2—CH2—, —CH?CH— or —CO— and R1 to R8 each independently represent a hydrogen atom, an alkyl group, a phenyl group, or a halogen group, provided that X and Y do not represent —CO— at the same time.

Abstract: There are disclosed a non-aqueous electrolyte which comprises a non-aqueous organic solvent and a lithium salt, and further contains a compound represented by the following formula (I): 1

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: The present invention is directed to a lithium ion electrolytic cell having a controlled electrode surface interface, and, an associated electrochemical process. The lithium ion electrolytic cell includes an electrode with a carbonaceous surface and a passivating layer, and, an electrolyte having a solvent. The passivating layer includes lithium, carbon and at least one of an additive or the product of interaction of the additive with the carbonaceous surface. The passivating layer has, as measured by X-ray photoelectron spectroscopy, a relative thickness index within the range of about from 10 to about 90, and a lithium ion content index in the range from about 0.1 to about 0.7.