Nec Corporation

Tanaka Chemical Corporation

Nec C Orporation

Sadanori Hattori

Katsumi Maeda

Ryota Yuge

Kentaro Nakahara

Sumio Iijima

Noriyuki Tamura

Mitsuharu Tabuchi

Kyousuke Doumae

Hideka Shibuya

Kentaro Kuratani

Akihiro Kirihara

Masahiko Ishida

Yuma Iwasaki

Hiroko Someya

Shizuka Sato

Yasutomo Omori

A heat-flow sensor that includes an insulating layer, a magnetic field application layer arranged on a first surface of the insulating layer and composed of a conductor, and a heat-flow detection layer arranged on a second surface of the insulating layer, the second surface facing the first surface, and the heat-flow detection layer composed of a conductive magnetic body. The heat-flow detection layer faces the magnetic field application layer via the insulating layer.

Heat-flow sensor

There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is suppressed. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula is coated with an oxide of at least one metal selected from the group consisting of La, Pr, Nd, Sm and Eu:LiMMnMFeO wherein 1.05&#x2264;x&#x2264;1.32, 0.33&#x2264;y&#x2264;0.63, 0.06&#x2264;z&#x2264;0.50, 0&#x3c;p&#x2264;0.63, 0.06&#x2264;q&#x2264;0.50, 0&#x2264;&#x3b4;&#x2264;0.80, y&#x2265;p, and z&#x2265;q; Mis at least one element selected from Ti and Zr; and Mis at least one element selected from the group consisting of Co, Ni and Mn.

Lithium-iron-manganese-based composite oxide and lithium-ion secondary battery using same

An object of the present invention is to provide a positive electrode active substance capable of suppressing gas generation associated with charge and discharge in a lithium secondary battery, and capable of suppressing gas generation associated with charge and discharge particularly even in cases where the use voltage of the lithium secondary battery is high, a positive electrode and a lithium secondary battery using the positive electrode active substance, and methods for producing these. The present invention is a positive electrode active substance for a lithium secondary battery, comprising a coated positive electrode active substance wherein a surface of a positive electrode active substance is directly coated with lithium metaphosphate.

Positive electrode active substance for lithium secondary battery, positive electrode for lithium secondary battery and lithium secondary battery, and methods for producing these

The present invention relates to a lithium manganese composite oxide having a metal-containing compound film and a carbon coating, in which at least a part of a surface of the lithium manganese composite oxide represented by Formula (1) is coated with the metal-containing compound film, and at least a part of the surface thereof is further coated with the carbon coating. The present invention can provide a positive electrode material capable of improving the discharge characteristics and the capacity retention rate after cycles of lithium ion secondary batteries.Li(FeNiMn)O&#x2003;&#x2003;(1),

Positive electrode material for lithium ion secondary batteries, and method for producing same

In terms of a lithium ion secondary battery using, in a positive electrode, a lithium transition metal composite oxide containing an over-stoichiometric amount of lithium, a lithium ion secondary battery in which an amount of a gas generated during charge/discharge cycles is reduced and capacity retention is improved is provided. The lithium ion secondary battery includes a positive electrode containing a lithium transition metal composite oxide containing Fe and containing an over-stoichiometric amount of lithium, and a nonaqueous electrolyte solution, and the nonaqueous electrolyte solution contains a nonaqueous organic solvent, an electrolyte, and lithium difluorophosphate.

Lithium ion secondary battery

There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is reduced. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula (1) is coated with an inorganic material: LiMMnMFeO(1) (wherein 1.05&#x2264;x&#x2264;1.32, 0.33&#x2264;y&#x2264;0.63, 0.06&#x2264;z&#x2264;0.50, 0&#x3c;p&#x2264;0.63, 0.06&#x2264;q&#x2264;0.50, 0&#x2264;&#x3b4;&#x2264;0.80, y&#x2265;p, and z&#x2265;q; Mis at least one element selected from Ti and Zr; and Mis at least one element selected from the group consisting of Co, Ni and Mn).

The present invention provides a non-aqueous electrolytic solution comprising a phosphinoamine-based compound represented by formula (1) below and a lithium ion secondary battery comprising the non-aqueous electrolytic solution. By adding the phosphinoamine-based compound to the non-aqueous electrolytic solution, oxidative degradation in the non-aqueous electrolytic solution is suppressed, and thus gas generation is suppressed. 

Non-aqueous electrolytic solution and lithium ion secondary battery

The present invention relates to a lithium-ion battery. The lithium-ion battery comprises a positive electrode containing, as a principal component, a lithium oxide having a layered rock-salt structure and represented by chemical formula: LiMMO. In this chemical formula, 1.16&#x2266;x&#x2266;1.32, 0.33&#x2266;y&#x2266;0.63, 0.06&#x2266;z&#x2266;0.50, Mrepresents a metal ion selected from Mn, Ti and Zr, or a mixture thereof, and Mrepresents a metal ion selected from Fe, Co, Ni and Mn, or a mixture thereof. The lithium-ion battery also comprises a negative electrode containing, as a principal component, a material capable of intercalating/deintercalating lithium ions, wherein peroxide ion(s) (O) are contained in the positive electrode.

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Tokyo, Japan

Sadanori Hattori