Toyota Jidosha Kabushiki Kaisha

Ngk Insulators, Inc.

Sumitomo Metal Mining Company, Ltd.

Toyota Motor Engineering & Manufacturing North America, Inc.

Okayama University

Daiichi Kigenso Kagaku Kogyo Co., Ltd.

Panasonic Corporation

Ryuta Sugiura

Tsutomu Nanataki

Daisuke Horikawa

Nobuyuki Kobayashi

Satoshi Kanada

Timothy Sean Arthur

Nikhilendra Singh

Taira Aida

Yuji Yamamoto

Tetsutaro Hayashi

Shingo Ota

Shohei Yokoyama

Takashi Teranishi

Akira Urakawa

Masaya Ugaji

Shigeki Okada

Tomohiro Yokoyama

Kaoru Nagata

Sadahiro Yagishita

Taku Nishikawa

Koji Kimura

Takeshi Abe

Jun Yoshikawa

Kunihiko Hayashi

Shuichi Ozawa

Hiroto Asano

Chikaaki Okuda

Tsuyoshi Sasaki

Naoto Ohira

Masaki Adachi

Kazuki Maeda

Miho Endo

A method of producing a wet mixture includes a stirring and mixing process in which lithium-containing positive electrode active material particles having surplus lithium compounds on the surface and crystalline ferroelectric ceramic particles are dried, stirred and mixed to obtain a mixed powder; and a solution mixing process in which a lithium conductor forming solution is mixed with the mixed powder to obtain a wet mixture containing coated lithium-containing positive electrode active material particles having a coating which is made of an amorphous lithium conductor and in which the ferroelectric ceramic particles are dispersed on the surface of the lithium-containing positive electrode active material particles.

Wet mixture, coated lithium-containing positive electrode active material particles, and method of producing lithium ion secondary battery, and wet mixture, coated lithium-containing positive electrode active material particles, and lithium ion secondary battery

To provide a cathode active material capable of reducing cathode resistance of a secondary battery by enhancing electron conductivity thereof without reducing discharge capacity of the secondary battery. Lanthanum compound particles each having a perovskite-type structure are dispersed on surfaces of secondary particles of a lithium transition metal-containing composite oxide and/or in gaps or grain boundaries between primary particles thereof. The lanthanum compound particles have a cross-sectional average particle size of 0.70 μm or less. The number of lanthanum compound particles present per unit area of the cross sections of the secondary particles is 0.03 particles/μmto 0.10 particles/μm, and the number of lanthanum compound particles present per unit area of the surfaces of the secondary particles is 0.01 particles/μmto 0.25 particles/μm. The content of lanthanum with respect to the entire cathode active material is within a range of 0.1% by mass to 5% by mass.

Cathode active material for lithium ion secondary battery and lithium ion secondary battery

An inorganic compound for a Li-ion conductor includes an oxyhalide compound with a chemical composition of MOX where M is at least one of Al, Sc, La, and Y, and X is at least one of F, Cl, Br, and I. Also, the oxyhalide compound has a thermal decomposition start temperature of the oxyhalide compound is greater than a thermal decomposition start temperature of FeOCl and a conductivity that is general equal to or greater than a conductivity of the FeOCl.

Inorganic compounds for lithium-ion conductors

A non-aqueous electrolyte secondary battery disclosed herein includes a positive electrode containing a positive electrode active material, a negative electrode, and a non-aqueous electrolyte, and the positive electrode active material includes a positive electrode active material particle containing a lithium transition metal compound, and a coating portion coating at least a part of a surface of the positive electrode active material particle. The coating portion contains a lithium ionic conductor containing lithium, a phosphoric acid group, and at least one element of lanthanum (La) and cerium (Ce).

Non-aqueous electrolyte secondary battery and positive electrode active material

A method of synthesizing an inorganic precursor for an ionic conductor includes mixing at least one oxide of M with at least one halide of M, heating the mixture of the at least one oxide of M and the at least one halide of M and forming an MOX inorganic oxyhalide compound, and injecting defects in the MOX inorganic oxyhalide compound and forming a defect doped (MOX)' precursor for an ionic conductor. The element or component M is selected from at least one of Fe, Al, La, and Y, the at least one halide of M is selected from at least one of a fluoride of M, a chloride of M, a bromide of M, and an iodide of M, and the element or component X is at least one of F, Cl, Br, and I.

Inorganic precursors for ionic conductors

A lithium-ion conducting composite material includes a Li binary salt, a Li-ion conductor with a chemical composition of LiFeO(OH)Cl, and at least two of: a first inorganic compound with a chemical composition of (FeM1)O(OH)Cl; a second inorganic compound with a chemical composition of M2OX; and a defected doped inorganic compound with a chemical composition of (M3OX)'. The value of n is 1 or 2, x is greater than 0 and less than or equal to 0.25, and y is greater than or equal to 0 and less than or equal to 0.25. Also, M1 is at least one of Mg and Ca, M2 and M3 are each at least one of Fe, Al, Sc, La, and Y, and X is at least one of F, Cl, Br, and I.

Lithium-ion conducting composite material

An ionic conductor includes an inorganic oxychloride compound with a chemical composition of (FeM)O(OH)Clwhere M is selected from at least one of Mg and Ca, and x is greater than 0 and less than or equal to 0.25, y is greater than or equal to 0 and less than or equal to 0.25. The inorganic oxychloride compound has a thermal decomposition start temperature of about 410&#xb0; C. and x-ray diffraction peaks (2&#x3b8;) between about 20.79&#xb0; and about 22.79&#xb0;, between about 30.03&#xb0; and about 32.03&#xb0;, between about 39.47&#xb0; and about 41.47&#xb0;, and between about 76.44&#xb0; and about 78.44&#xb0;.

Inorganic oxychloride ionic conductors

A non aqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, and a non aqueous electrolyte, and the positive electrode active material includes a positive electrode active material particle containing a lithium transition metal compound, and a coating portion coating at least a part of a surface of the positive electrode active material particle. The coating portion contains a lithium ionic conductor containing lithium, a phosphoric acid group, and yttrium. The lithium ionic conductor includes a region A in which a ratio of yttrium is relatively rich and a region B in which the ratio of yttrium is relatively poor.

The positive electrode active material disclosed herein includes a base portion including a lithium transition metal complex oxide having a layered crystal structure, and a coating portion including an electroconductive oxide having a layered crystal structure. A smaller angle &#x3b8; formed by a stacking plane direction of the lithium transition metal complex oxide and a stacking plane direction of the electroconductive oxide satisfies the following conditions: an average angle &#x3b8;ave. obtained by arithmetically averaging the angle &#x3b8; satisfies 0&#xb0;&#x2264;&#x3b8;ave.&#x2264;60&#xb0;; and a ratio of points in which the angle &#x3b8; is greater than 60&#xb0; is 39% or less.

Positive electrode active material having high degree of matching of electroconductive direction and lithium ion secondary cell using same

A battery includes at least an electrode array and an electrolyte solution. The electrolyte solution contains at least a solvent and a supporting salt. The electrode array includes at least a positive electrode, a porous insulating layer, and a negative electrode. The porous insulating layer is interposed between the positive electrode and the negative electrode. The porous insulating layer contains at least a group of inorganic nanoparticles and a group of polymer particles. Each inorganic nanoparticle in the group of inorganic nanoparticles is a dielectric. Each inorganic nanoparticle in the group of inorganic nanoparticles is in contact with the electrolyte solution.

Battery and method of producing the same

According to an aspect of the present invention, there is provided a positive electrode material which contains a positive electrode active material, and a dielectric material having a perovskite crystal structure. In the positive electrode material, in an X-ray diffraction pattern (vertical axis: diffraction intensity, horizontal axis: diffraction angle 2&#x3b8; (rad)) obtained by X-ray diffraction measurement using a CuK&#x3b1; ray, a highest intensity peak which is a peak derived from the dielectric material and has the highest intensity is in a range satisfying 2&#x3b8;=31&#xb0; to 32&#xb0;, and a half width x of the highest intensity peak satisfies the following expression: 0.22&#x2264;x&#x2264;0.33.

Positive electrode material and secondary battery using the same

Provided is a positive electrode material that allows reducing battery resistance. The positive electrode material disclosed herein has particles of a positive electrode active material, each having a void communicating between the surface and at least the interior; and an electronic conductor present on the surface of the particles of the positive electrode active material. The positive electrode active material has a layered rock salt structure, and has a composition represented by Formula (I) below. The electronic conductor has a composition represented by Formula (II) below,LiNiMnCoMO&#x2003;&#x2003;(I)LaMaCoMbO&#x2003;&#x2003;(II)

Positive electrode material

A method of manufacturing a positive electrode material for lithium ion secondary battery includes the following (&#x3b1;) and (&#x3b2;): (&#x3b1;) a positive electrode active material is prepared; and (&#x3b2;) the positive electrode material for lithium ion secondary battery is manufactured by forming a coat on at least a portion of a surface of the positive electrode active material. The coat is formed to satisfy the following (1) to (3): (1) the coat includes a lithium ion conductor and a ferroelectric substance; (2) the ferroelectric substance is dispersed in the lithium ion conductor; and (3) the lithium ion conductor is interposed at least partially between the positive electrode active material and the ferroelectric substance.

Method of manufacturing positive electrode material for lithium ion secondary battery and positive electrode material for lithium ion secondary battery

Growing community of inventors

Toyohashi, Japan

Ryuta Sugiura