Sumitomo Osaka Cement Co., Ltd.

Sumitomo Metal Mining Company, Ltd.

Kouji Oono

Satoru Oshitari

Masataka Oyama

Takao Kitagawa

Tsutomu Nozoe

Ryuuta Yamaya

Hirofumi Yasumiishi

Kenta Ooishi

Tetsuya Nakabeppu

Hiroyuki Mine

Shinichi Tanaka

A positive electrode active material that is used in a high-temperature operation type lithium ion solid secondary battery, wherein the positive electrode active material is made of oxide particles, which contains a first transition element and does not include an alkali metal.

Positive electrode active material, high-temperature operation type lithium-ion polymer secondary battery, high-temperature operation type lithium ion inorganic all-solid-state secondary battery

An electrode material including a carbonaceous-coated electrode active material having primary particles of the electrode active material and secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which a specific surface area, which is obtained using a nitrogen adsorption method, is 4 m/g or more and 40 m/g or less, a volume of micropores per unit mass is 0.05 cm/g or more and 0.3 cm/g or less, and an average micropore diameter, which is obtained from the volume of the micropores per unit mass and the specific surface area, is 26 nm or more and 90 nm or less.

Electrode material, method for manufacturing electrode material, electrode, and lithium ion battery

The positive electrode material for lithium ion secondary batteries includes a mixture including a positive electrode active material in which a length of a longest side of a primary particle is 1 nm or more and 1000 nm or less and a NASICON-type compound in which a length of a longest side of a primary particle is 1 nm or more and 1000 nm or less.

Positive electrode material for lithium ion secondary batteries, positive electrode for lithium ion secondary batteries, and lithium ion secondary battery

An electrode material including a carbonaceous-coated electrode active material having primary particles of an electrode active material, secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which, in the electrode material, when ten random 180 nm&#xd7;180 nm views are observed using an electron microscope at a magnification of 100,000 times, the number of free carbon aggregates is three or less, and the number of protrusions twice or more as thick as the carbonaceous film is three or less.

The positive electrode material for a lithium ion polymer battery of the present invention is active material particles including core particles represented by General Formula LiADPOand the carbonaceous film that coats surfaces of the core particles, wherein a paste including the active material particles has a viscosity of 5,000 mPa&#xb7;s or less when a viscosity of the paste is measured at a shear rate of 4.0 [1/s], wherein the paste is a mixture of the active material particles, an ion-conductive polymer, a conductive auxiliary agent and a solvent, in which the active material particles, the ion-conductive polymer and the conductive auxiliary agent are included in the paste in a mass ratio of 66:30:4, and a total solid content of the paste is 40% by mass.

Positive electrode material for lithium ion polymer battery, positive electrode for lithium ion polymer battery, and lithium ion polymer battery

A positive electrode material for a lithium ion secondary battery includes an olivine-type phosphate-based compound represented by General Formula LixAyDzPOand carbon, and, in transmission electron microscopic observation of a cross section of a secondary particle that is an agglomerate of primary particles of the olivine-type phosphate-based compound, a 300-point average value of filling rates of the carbon that fills insides of voids having a diameter of 5 nm or larger that are formed by the primary particles is 30 to 70%. A is any one of Co, Mn, Ni, Fe, Cu, and Cr, D is any one of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, and Y, and x, y, and z satisfy 0.9&#x3c;x&#x3c;1.1, 0&#x3c;y&#x2264;1.0, 0&#x2264;z&#x3c;1.0, and 0.9&#x3c;y+z&#x3c;1.1.

Positive electrode material for lithium ion secondary battery, positive electrode for lithium ion secondary battery, and lithium ion secondary battery

An electrode material for a lithium ion secondary battery of the present invention includes an electrode active material represented by LiFeMnMgAPOand a carbonaceous film coating a surface of the electrode active material, a particle diameter D10 of secondary particles is 0.5 &#x3bc;m or more, a particle diameter D90 of the secondary particles is 25 &#x3bc;m or less, and a ratio (O/I) of an average value of thicknesses I of the carbonaceous film on the surfaces of the primary particles in a range of 0.3 &#x3bc;m or less from a center of the secondary particle at 300 measurement points to an average value of thicknesses O of the carbonaceous film on the surfaces of the primary particles in a range of 0.3 &#x3bc;m or less from an outermost surface of the secondary particle at 300 measurement points is 0.85 or more and less than 1.00.

Electrode material for lithium ion secondary battery, electrode for lithium ion secondary battery, and lithium ion secondary battery

An electrode material having an electrode active material and a pyrolytic carbonaceous electron-conducting film that coats a surface of the electrode active material, in which an amount of a surface acid of the electrode material, which is determined by a back-titration method using tetrabutylammonium hydroxide, is 1 &#x3bc;mol/mor more and 5 &#x3bc;mol/mor less per surface area of the electrode material.

Electrode material and method for manufacturing the same

An electrode material including a carbonaceous-coated electrode active material having primary particles of an electrode active material and secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which a proportion of a volume of micropores having a micropore diameter of 50 nm or less in a volume of micropores having a micropore diameter of 300 nm or less, which is obtained using a nitrogen adsorption method, is 40% or more.

A lithium-ion secondary battery of the present invention includes a cathode including an electrode material having electrode active material particles and an oxide coat and a carbonaceous film which coat surfaces of the electrode active material particles, an anode including a carbon-based active material, and an electrolytic solution, and the electrolytic solution does not substantially include additives for stabilizing a coat formed on a surface of the anode.

Lithium-ion secondary battery

An electrode material includes Fe-containing olivine-structured LiADPO(wherein A represents one or more elements selected from the group consisting of Co, Mn, Ni, Cu, and Cr; D represents one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, Y, and rare earth elements; 0&#x3c;x&#x2264;2; 0&#x3c;y&#x2264;1; and 0&#x2264;z&#x2264;1.5) particles that are coated with a carbon coating film, in which an abundance of Fe is 0.01 to 0.1 mol with respect to 1 mol of LiADPO, and an abundance ratio (Fe/(Fe+A+D)) of Fe on surfaces of the LiADPOparticles is 0.02 to 0.25.

Electrode material, paste, electrode plate, and lithium ion battery

An electrode material including electrode active material particles and a carbonaceous film layer coating surfaces of the electrode active material particles and including a metal oxide, a content ratio of the metal oxide in the carbonaceous film layer being 5% by mass to 70% by mass. A method for manufacturing an electrode material, in which electrode active material particles, a metal salt or metal alkoxide containing any one or more metal atoms selected from a group consisting of Al, Zr, Si, and Ti, and an organic compound which is a precursor of carbon are mixed so that a total blending amount of the metal salt or metal alkoxide satisfies that an amount of a metal oxide in the carbonaceous film layer when the metal salt or metal alkoxide is all changed to the metal oxide is 5% by mass to 70% by mass, and are heated in a non-oxidative atmosphere.

Electrode material and method for manufacturing same

Provided is a positive electrode active material for lithium ion batteries, which may be in the form of fine particles with good crystallinity and high purity by suppressing grain growth, and which is capable of improving the charge and discharge capacity and high-rate characteristics, a production method thereof, an electrode for lithium ion batteries, and a lithium ion battery. The positive electrode active material for lithium ion batteries of the invention is a positive electrode active material for lithium ion batteries which are formed from LiMPO(provided that, M represents one or more kinds selected from a group consisting of Mn, Co, and Ni). In an X-ray diffraction pattern, a ratio I(020)/I(200) of the X-ray intensity I(020) of a (020) plane around a diffraction angle 2&#x3b8; of 29&#xb0; to the X-ray intensity I(200) of a (200) plane around a diffraction angle 2&#x3b8; of 17&#xb0; is 3.00 to 5.00, and a specific surface area is 15 m/g to 50 m/g.

Positive electrode active material for lithium ion battery, method of producing the same, electrode for lithium ion battery, and lithium ion battery

Provided is a positive electrode active material for lithium ion batteries, which is capable of realizing stability and safety at a high voltage, a high energy density, high load characteristics, and long-term cycle characteristics by controlling a crystal shape of LiMnPOparticles having a crystal structure very suitable for Li diffusion or controlling an average primary particle size, a production method thereof, an electrode for lithium ion batteries, and a lithium ion battery. The positive electrode active material for lithium ion batteries of the invention is a positive electrode active material for lithium ion batteries, which is formed from LiMnPO. Values of lattice constants a, b, and c, which are calculated from an X-ray diffraction pattern, satisfy 10.41 &#x212b;&#x3c;a&#x2266;10.43 &#x212b;, 6.070 &#x212b;&#x3c;b&#x2266;6.095 &#x212b;, and 4.730 &#x212b;&#x3c;C&#x2266;4.745 &#x212b;, and an average particle size is 10 to 100 nm.

Growing community of inventors

Tokyo, Japan

Kouji Oono