Abstract: A barium titanate fiber is useful as a filler for a polymer composite piezoelectric body, a polymer composite piezoelectric body has high piezoelectric properties, and a piezoelectric element utilizes the polymer composite piezoelectric body. In the barium titanate fiber, the molar ratio of barium atoms to titanium atoms (Ba/Ti ratio) falls within the range of 1.01 to 1.04. The polymer composite piezoelectric body includes a resin composition containing the barium titanate fiber and a polymer. The piezoelectric element including an electrically conductive layer on one surface or both surfaces of the polymer composite piezoelectric body.

Abstract: [Task] To provide a preparation method of a nickel-lithium metal composite oxide powder [Means for Resolution] In a preparation method of a nickel-lithium metal composite oxide powder having a small particle diameter, aggregation of particles and excessive crushing of particles do not occur, by performing the firing at a temperature equal to or lower than a melting point of lithium carbonate by using lithium carbonate as a lithium source, and therefore, a preparation method of a nickel-lithium metal composite oxide powder having a small particle diameter, in which fine powder or cracks of particles are not generated, is provided.

Abstract: A composition for a secondary battery negative electrode including a carbonaceous material (a) and a silicon oxide structure (b), wherein the silicon oxide structure (b) includes a silicon oxide framework containing Si and O in its atomic composition and silicon-based nanoparticles that are chemically bonded to the silicon oxide framework as components, wherein the silicon oxide structure (b) is contained in a proportion of 15 mass % or more with respect to a total amount of the carbonaceous material (a) and the silicon oxide structure (b), and wherein the silicon oxide structure (b) satisfies the following conditions (i) to (iii): (i) having an atomic composition represented by a general formula SiOx2Hy2 (0.3<x2<1.5, 0.01<y2<0.35), (ii) having Si—H bonds, and (iii) being essentially free of carbon.

Abstract: There are provided a material for a negative electrode active material exhibiting a favorable capacity retention rate and Coulomb efficiency, a method of producing the material, a negative electrode composition using the material, a negative electrode, and a secondary battery. A SiOC structure, includes (A) at least one silicon-based fine particles; and (B) a SiOC coating layer containing at least Si (silicon), O (oxygen), and C (carbon) as constituent elements, wherein the at least one silicon-based fine particles are covered with the SiOC coating layer, and the average particle size based on a volume-based particle size distribution is in a range of 1 nm to 999 ?m.

Abstract: To provide a preparation method of a nickel-lithium metal composite oxide powder [Means for Resolution] In a preparation method of a nickel-lithium metal composite oxide powder having a small particle diameter, aggregation of particles and excessive crushing of particles do not occur, by performing the firing at a temperature equal to or lower than a melting point of lithium carbonate by using lithium carbonate as a lithium source, and therefore, a preparation method of a nickel-lithium metal composite oxide powder having a small particle diameter, in which fine powder or cracks of particles are not generated, is provided.

Abstract: A composition for a secondary battery negative electrode including a carbonaceous material (a) and a silicon oxide structure (b), wherein the silicon oxide structure (b) includes a silicon oxide framework containing Si and O in its atomic composition and silicon-based nanoparticles that are chemically bonded to the silicon oxide framework as components, wherein the silicon oxide structure (b) is contained in a proportion of 15 mass % or more with respect to a total amount of the carbonaceous material (a) and the silicon oxide structure (b), and wherein the silicon oxide structure (b) satisfies the following conditions (i) to (iii): (i) having an atomic composition represented by a general formula SiOx2Hy2 (0.3<x2<1.5, 0.01<y2<0.35), (ii) having Si—H bonds, and (iii) being essentially free of carbon.

Abstract: The disclosure realize high performance and reduction in cost of a lithium ion battery positive electrode active material. A preparation method of a nickel-lithium metal composite oxide represented by Formula LiaNi1-x-yCoxMyOb, including a mixing step of raw materials and a precursor with each other, a low-temperature firing step of performing the firing at a temperature lower than a melting point of lithium carbonate, and a high-temperature firing step of performing the firing at a temperature equal to or higher than a melting point of lithium carbonate. Granular nickel-lithium metal composite oxide without aggregation or fixation are obtained immediately after the firing.

Abstract: Disclosed is a process of preparing an optically active allyl compound, e.g., as represented by formula (III): comprising asymmetrically coupling an allyl compound with an organic nucleophilic compound in the presence of a catalyst. The catalyst is preferably a transition metal complex compound having a phosphine ligand. The phosphine ligand is preferably a 2,3-bis(dialkylphosphino)pyrazine derivative. The pyrazine derivative is preferably a quinoxaline derivative. The transition metal is preferably palladium.

Abstract: Disclosed is a process of preparing an optically active ?-hydroxycarboxylic acid derivative comprising asymmetrically hydrogenating a ?-keto compound in the presence of a catalyst comprising a transition metal complex compound having a 2,3-bis(dialkylphosphino)pyrazine derivative as a ligand. The pyrazine derivative is preferably a quinoxaline derivative, and the transition metal is preferably ruthenium. Preferred examples of the quinoxaline derivative are (S,S)-2,3-bis(tert-butylmethylphosphino)quinoxaline, (R,R)-bis(tert-butylmethylphosphino)quinoxaline, (S,S)-bis(tert-adamantylmethylphosphino)quinoxaline, and (R,R)-bis(adamantylmethylphosphino)quinoxaline.

Abstract: Disclosed is a process of preparing an optically active ?-hydroxycarboxylic acid derivative comprising asymmetrically hydrogenating a ?-keto compound in the presence of a catalyst comprising a transition metal complex compound having a 2,3-bis(dialkylphosphino)pyrazine derivative as a ligand. The pyrazine derivative is preferably a quinoxaline derivative, and the transition metal is preferably ruthenium. Preferred examples of the quinoxaline derivative are (S,S)-2,3-bis(tert-butylmethylphosphino)quinoxaline, (R,R)-bis(tert-butylmethylphosphino)quinoxaline, (S,S)-bis(tert-adamantylmethylphosphino)quinoxaline, and (R,R)-bis(adamantylmethylphosphino)quinoxaline.

Abstract: Disclosed is a process of preparing an optically active allyl compound comprising asymmetrically coupling an allyl compound with an organic nucleophilic compound in the presence of a catalyst. The catalyst is preferably a transition metal complex compound having a phosphine ligand. The phosphine ligand is preferably a 2,3-bis(dialkylphosphino)pyrazine derivative. The pyrazine derivative is preferably a quinoxaline derivative. The transition metal is preferably palladium.