Tdk Corporation

Tomohiko Kato

Atsushi Sano

Keitaro Otsuki

Akiji Higuchi

Akinobu Nojima

Takayuki Maruyama

Osamu Shinoura

Masaki Sobu

Yasuyuki Kawanaka

Yuko Saya

Kouji Tokita

Hirofumi Nakano

Kenji Horino

Yasunobu Oikawa

Hideaki Seki

Akira Shibue

Shinichiro Kakei

Rie Ihara

A method for manufacturing an active material, capable of improving the discharge capacity of a lithium ion secondary battery is provided. The method for manufacturing an active material according to the present invention includes a first step of heating a mixture solution including a lithium source, a phosphate source, a vanadium source, and water under pressure to generate a precursor in the mixture solution, and adjusting the pH of the mixture solution including the precursor to be 6 to 8; and a second step of heating the precursor at 425 to 650&#xb0; C. after the first step to generate an active material.

Active material, method for manufacturing active material, electrode, lithium ion secondary battery, and method for manufacturing lithium ion secondary battery

An active material capable of improving the discharge capacity of a lithium ion secondary battery is provided. The active material of the present invention includes LiVOPOand one or more metal elements selected from the group consisting of Al, Nb, Ag, Mg, Mn, Fe, Zr, Na, K, B, Cr, Co, Ni, Cu, Zn, Si, Be, Ti, and Mo.

Active material, method for manufacturing active material, electrode, and lithium ion secondary battery

A gas detection sheet wherein a porous coordination polymer represented by formula (1) is supported on a supporter and the air permeability of the gas detection sheet is 0.8 seconds or more and 60 seconds or less.Fe(pz)[NiM(CN)]&#x2003;&#x2003;(1)(wherein, pz=pyrazine, 0.95&#x2264;x&#x3c;1.05, M=Pd or Pt, 0&#x2264;y&#x3c;0.15).

Gas detection sheet

A porous coordination polymer represented by the following formula (1), wherein, the ratio A/B of the diffraction peak intensity A of (001) plane to the diffraction peak intensity B of (110) plane is 0.8 or more and 5.8 or less,Fe()[NiM(CN)]&#x2003;&#x2003;(1)wherein, pz=pyrazine, 0.95&#x2264;x&#x3c;1.05, M=Pd, Pt, 0&#x2264;y&#x3c;0.15. Also described is a gas detecting material and a lithium ion secondary battery having the porous coordination polymer.

Porous coordination polymer, gas detecting material and lithium ion secondary battery having the same

A negative electrode active material for a lithium ion secondary battery includes a network structure formed by at least some of iron oxide particles being linked to each other.

Negative electrode active material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery

A negative electrode active material for a lithium ion secondary battery includes secondary particles formed by primary particles containing iron oxide that are linked in a chain.

To provide an active material with high capacity, high initial charge-discharge efficiency, and high average discharge voltage. An active material according to the present invention includes a first active material and a second active material, wherein the ratio (&#x3b4;) of the second active material (B) to the total amount by mole of the first active material (A) and the second active material (B) satisfies 0.4 mol %&#x2266;&#x3b4;&#x2266;18 mol % [where &#x3b4;=(B/(A+B))&#xd7;100].

Active material, electrode using same, and lithium ion secondary battery

To provide an active material having high capacity and excellent cycle characteristics. An active material has a layered crystal structure and is expressed by a compositional formula (1) LiNiCoMnMO(1), where the element M is at least one kind of element selected from the group consisting of Al, Si, Zr, Ti, Fe, Mg, Nb, Ba, and V; 1.9&#x2266;(a+b+c+d+y)&#x2266;2.1; 1.05&#x2266;y&#x2266;1.35; 0&#x3c;a&#x2266;0.3; 0&#x3c;b&#x2266;0.25; 0.3&#x2266;c&#x2266;0.7; 0&#x2266;d&#x2266;0.1; and 1.9&#x2266;x&#x2266;2.1, and wherein 0.69&#x2266;Ni/Ni&#x2266;0.85, where Niis the Ni composition amount at a center portion of the active material primary particle, and Niis the Ni composition amount in the vicinity of a surface (in a width of 30 nm from the surface).

Active material for lithium ion secondary battery, and lithium ion secondary battery

A positive electrode material for a lithium ion secondary battery contains a first compound represented by LiV(PO)and one or more second compounds selected from vanadium oxide and lithium vanadium phosphate.

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

An active material having high capacity and excellent charging/discharging cycle durability at high potential is provided. The active material has a layered structure and is represented by the following composition formula (1):LiNiCoMnMOFP&#x2003;&#x2003;(1)wherein the element M is at least one element selected from the group consisting of Al, Si, Zr, Ti, Fe, Mg, Nb, Ba and V, and 1.9&#x2266;(a+b+c+d+y)&#x2266;2.1, 1.0&#x2266;y&#x2266;1.3, 0&#x3c;a&#x2266;0.3, 0&#x2266;b&#x2266;0.25, 0.3&#x2266;c&#x2266;0.7, 0&#x2266;d&#x2266;0.1, 0.07&#x2266;z1&#x2266;0.15, 0.01&#x2266;z2&#x2266;0.1, and 1.9&#x2266;(x+z1)&#x2266;2.1 are satisfied.

Active material, manufacturing method for active material, and lithium ion secondary battery

To provide an active material from which a sufficient discharge capacity is obtained, an electrode containing the active material, a lithium secondary battery including the electrode, and a method for making an active material. A method for making an active material includes a temperature elevation step of heating a mixture containing a lithium source, a pentavalent vanadium source, a phosphoric acid source, water, and a reductant in a hermetically sealed container at a temperature elevation rate T1 from 25&#xb0; C. to 110&#xb0; C. and then at a temperature elevation rate T2 from 110&#xb0; C. to a designated temperature of 200&#xb0; C. or more, in which T1&#x3e;T2; T1=0.5 to 10&#xb0; C./min; and T2=0.1 to 2.2&#xb0; C./min.

Active material, electrode containing the active material, lithium secondary battery including the electrode, and method for making active material

The method of manufacturing an active material in accordance with the first aspect of the invention yields an active material containing LiVOPOcapable of improving the cycle characteristic of a battery. Methods of manufacturing active materials in accordance with the second, third, and fourth aspects of the present invention yield active materials containing LiVOPOcapable of improving the discharge capacity of a battery.

Active material, electrode containing same, lithium-ion secondary battery with the electrode, and method of manufacturing active material

A dielectric device comprises a substrate made of a metal and an oxide dielectric layer mounted on a surface of the substrate. The surface of the substrate has metal oxide regions distributed like islands, while the oxide dielectric layer is in close contact with the substrate through the metal oxide regions. Since adhesion is higher in an area where the substrate and the oxide dielectric layer are in close contact with each other through the metal oxide regions distributed like islands on the surface of the substrate, the adhesion between the substrate and oxide dielectric layer in the dielectric device is enhanced. As compared with a case where a rough surface is formed on a metal foil, the metal oxide region and the substrate are inhibited from forming a rough surface, whereby leakage characteristics can be kept from being deteriorated by the rough surface.

Dielectric device and method of manufacturing dielectric device

One capacitor fabrication process including metal layer forming a metal layer on one surface of a substrate, dielectric layer forming a dielectric layer on the metal layer, metal foil forming a metal foil on the dielectric layer, separating the noble metal layer from the dielectric layer, and electrode layer forming an electrode layer on the second surface of the dielectric layer, wherein the second surface faces away from the first surface of the dielectric layer with the metal foil. Another capacitor fabrication process includes separation layer forming a separation layer on one surface of a substrate, dielectric layer forming a dielectric layer on the separation layer, metal foil forming a metal foil the dielectric layer, separating the substrate from the separation layer, and an electrode layer forming an electrode layer on the second surface of the dielectric layer, wherein the second surface faces away from the first surface of said dielectric layer with the metal foil. A thin-film capacitor has higher capacity, is so slimmed down and has a form well fit for being buried in a base board, and can be used even at high frequencies.

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Tokyo, Japan

Tomohiko Kato