Tdk Corporation

Japan Aerospace Exploration Agency

Energy Storage Materials Llc.

Takeo Tsukada

Masahito Furukawa

Masakazu Hirose

Teiichi Tanaka

Tatsuya Ishii

Hidesada Natsui

Hitoshi Oka

Masaru Nanao

Taisuke Masuko

Hiroshi Sato

Daisuke Tanaka

Hideharu Moro

Masahiro Oishi

Hideya Sakamoto

Tetsuya Ueno

Gakuho Isomichi

Masaaki Kanasugi

Norishige Yamaguchi

Kazuhiro Okada

Shigekazu Hidaka

Kenichiro Masuda

Toshiyuki Suzuki

Takeshi Nomura

Toshiaki Yamada

Satoshi Ozawa

Yasuharu Miyauchi

Taeko Tsubokura

Junichi Yamazaki

Tomohisa Azuma

Katsuhiko Wakayama

Tomohiro Sogabe

Takaaki Tsurumi

Shinichi Yoda

Kentei Yono

Norimasa Sakamoto

Masayoshi Inoue

Keisuke Itakura

Hirofumi Kakuta

Kumiko Iezumi

Masami Endo

Junji Terauchi

Yumiko Kozasa

Yoshinori Asakura

Hideki Kitashima

Masataka Miyashita

An active material is represented by a chemical formula LiVM(PO)(−0.35≤a≤0.7, 0<x≤51.4), and M is an element to be a divalent or tetravalent cation in a crystal structure.

Active material and all-solid secondary battery

An objective of the present invention is to provide an all-solid-state battery with a high discharge capacity in which lithium vanadium phosphate is used as a positive electrode active material layer and a negative electrode active material layer. According to the present invention, the positive electrode active material layer and the negative electrode active material layer of the all-solid-state battery having an all-solid-state electrolyte between a pair of electrodes contain the lithium vanadium phosphate, the lithium vanadium phosphate contains a polyphosphate compound containing Li and V, and the lithium vanadium phosphate contains LiV(PO)as a main phase and contains 1.0% by weight or more and 15.0% by weight or less of LiPOrelative to LiV(PO), whereby a high discharge capacity can be provided.

All-solid-state battery

An all-solid lithium ion secondary battery has a pair of electrode layers and a solid electrolyte layer between the pair of electrode layers. In the all-solid lithium ion secondary battery, at least one electrode of the pair of electrodes has an active material layer and an intermediate layer on the surface of the active material layer on the side of the solid electrolyte layer, and each of the solid electrolyte layer, the intermediate layer, and the active material layer includes a compound containing Li and two or more shared types of metal elements other than Li, the two or more shared types of metal elements in the solid electrolyte layer, the intermediate layer, and the active material layer are identical between the solid electrolyte layer, the intermediate layer, and the active material layer.

All-solid lithium ion secondary battery

A high discharge capacity in an all-solid-state battery in which lithium vanadium phosphate is used in a positive electrode active material layer and a negative electrode active material layer. An all-solid-state battery wherein a positive electrode active material layer and a negative electrode active material layer contain lithium vanadium phosphate, which includes a Li- and V-containing polyphosphate compound and satisfies 1.50&#x3c;Li/V&#x2264;2.30, with the percentage of divalent V included in the V being 5&#x2dc;80%. Thus, a high discharge capacity can be provided.

An active material layer containing a compound represented by a general formula (1): LiVAlTiPO(1), where a, b, c, d, and e in the general formula (1) are numbers satisfying 0.5&#x2264;a&#x2264;3.0, 1.20&#x3c;b&#x2264;2.00, 0.01&#x2264;c&#x3c;0.06, 0.01&#x2264;d&#x3c;0.60, and 2.80&#x2264;e&#x2264;3.20; and a solid electrolyte layer containing a compound represented by a general formula (2): LiVAlTiPO(2), where f, g, h, i, and j in general formula (2) are numbers satisfying 0.5&#x2264;f&#x2264;3.0, 0.01&#x2264;g&#x3c;1.00, 0.09&#x3c;h&#x2264;0.30, 1.40&#x3c;i&#x2264;2.00, and 2.80&#x2264;j&#x2264;3.20.

All solid-state lithium ion secondary battery

A Li-ion conductive oxide ceramic material including a garnet-type or similar crystal structure according to an aspect of the present disclosure contains Li, La, Zr, and O, the material further containing one or more elements selected from the group consisting of rare-earth elements. A Li-ion conductive oxide ceramic material including a garnet-type or similar crystal structure according to the other aspects of the present disclosure is represented by the following composition formula (1) LiLaZrAOwhere A is one or more elements selected from the group consisting of rare-earth elements, and x is a number such that 0&#x3c;x&#x2264;0.5.

Li-ion conductive oxide ceramic material including garnet-type or similar crystal structure

A garnet-type Li-ion conductive oxide contains Li, La, Zr, and oxygen and contains at least one type of element among elements represented by M1, M2, M3, and M4. M1, M2, M3, and M4 are as follows: M1: One or more types of elements selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M2: One or more types of elements selected from the group consisting of Al, Ga, Co, Fe, and Y; M3: One or more types of elements selected from the group consisting of Sn and Ge; and M4: One or more types of elements selected from the group consisting of Ta and Nb.

Garnet-type li-ion conductive oxide

A garnet-type Li-ion conductive oxide containing LiLaZrO(6&#x2266;x&#x2266;8) contains Al and element T (T is one or more from Ni, Cu, Co, and Fe). The content of Al is, in terms of AlO, 2.5 mol %&#x2266;AlO&#x2266;15 mol % with respect to a total amount of LiLaZrOcontained in the garnet-type Li-ion conductive oxide. The content of element T is 25 mol %&#x2266;T&#x2266;100 mol % with respect to the total amount of LiLaZrOcontained in the garnet-type Li-ion conductive oxide.

Garnet-type Li-ion conductive oxide and all-solid Li-ion secondary battery

The present invention provides a solid-state ion capacitor. In the solid-state ion capacitor, the particle number in the thickness direction of the solid electrolyte sandwiched between the electrodes was at least 1 and the average particle number was 80 or less. Further, the solid electrolyte includes particles with D10&#x2dc;D90 in the particle diameters of particle size distribution of 0.5 &#x3bc;m or more and 100 &#x3bc;m or less.

Solid-state ion capacitor

A piezoelectric ceramic composition including a perovskite-type oxide, wherein the perovskite-type oxide has Na, K, Li, Ba and Sr at the A site and Nb, Ta and Zr at the B site, and has a crystal phase transition in a temperature range of &#x2212;50 to 150&#xb0; C., the crystal phase transition being accompanied by an endotherm of no greater than 4 J/g, as well as a piezoelectric elementprovided with a piezoelectric ceramicthat contains the piezoelectric ceramic composition.

Piezoelectric ceramic composition consisting of a perovskite-type oxide and piezoelectric element

A hexagonal type barium titanate powder comprising barium titanate as a main component shown by a generic formula of (BaM)(TiGa)Oand having hexagonal structure wherein;

Hexagonal type barium titanate powder, producing method thereof, dielectric ceramic composition, electronic component, and producing method of the electronic component

To provide a hexagonal type barium titanate powder having a fine and uniform particle size and contributing to a thinner dielectric layer. A hexagonal type barium titanate powder according to the present invention has the following characteristics that a maximum particle diameter is 1.0 &#x3bc;m or less, a ratio of 90% accumulated particle diameter and 50% accumulated particle diameter is 3.0 or less, and a hexagonal ratio is 50% or more.

Hexagonal type barium titanate powder, producing method thereof, dielectric ceramic composition and electronic component

Dielectric ceramic composition includes a hexagonal type barium titanate as a main component shown by a generic formula of (BaM)(TiMn)Oand having hexagonal structure wherein an effective ionic radius of 12-coordinated 'M' is &#x2212;20% or more to +20% or less with respect to an effective ionic radius of 12-coordinated Baand the A, B, &#x3b1; and &#x3b2; satisfy relations of 1.000&#x3c;(A/B)&#x2266;1.040, 0&#x2266;&#x3b1;&#x3c;0.003, 0.03&#x2266;&#x3b2;&#x2266;0.2, and as subcomponents, with respect to the main component, certain contents of alkaline earth oxide such as MgO and the like, MnOand/or CrO, and CuO and AlOand rare earth element oxide and glass component including SiO. According to the present invention, it can be provided the hexagonal type barium titanate powder and the dielectric ceramic composition which are preferable for producing electronic components such as a capacitor and the like showing comparatively high specific permittivity, having advantageous insulation property and having sufficient reliability.

Dielectric ceramic composition includes a hexagonal type barium titanate as a main component shown by a generic formula (BaM)(TiMn)Oand having hexagonal structure wherein an effective ionic radius of 12-coordinated 'M' is &#x2212;20% or more to +20% or less with respect to an effective ionic radius of 12-coordinated Baand the A, B, &#x3b1; and &#x3b2; satisfy relations of 0.900&#x2266;(A/B)&#x2266;1.040, 0.003&#x2266;&#x3b1;&#x2266;0.05, 0.03&#x2266;&#x3b2;&#x2266;0.2, and as subcomponents, with respect to the main component, certain contents of alkaline earth oxide such as MgO and the like, MnOand/or CrO, CuO, AlO, rare earth element oxide and glass component including SiO. According to the present invention, it can be provided the hexagonal type barium titanate powder and dielectric ceramic composition which are preferable for producing electronic components such as a capacitor and the like showing high specific permittivity, having advantageous insulation property and sufficient reliability.

A piezoelectric ceramic composition having a large piezoelectric constant (d) and as well having a large Qm value is to be provided. The piezoelectric ceramic composition aimed at has a composition corresponding to a solid solution containing a first compound possessing a rhombohedral crystal-based perovskite structure, a second compound possessing a tetragonal crystal-based perovskite structure, and a third compound. The third compound is a compound oxide containing Bi as a first component element, Mn as a second component element, and a tetravalent metallic element or a pentavalent metallic element as a third component element. The tetravalent metallic element is at least one member selected from the group consisting of Ti, Zr, Hf, and Sn. The pentavalent metallic element is at least one member selected from the group consisting of Nb, Ta, and Sb.

Piezoelectric ceramic composition

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Tokyo, Japan

Takeo Tsukada