A catalyst comprising a barium niobate-based cubic perovskite structure where, Mg and Ca has been used to dope the niobium sites along with Fe, Ni, Co, Y, and Pr.

The embodiments herein relate to electrochromic stacks, electrochromic devices, and methods and apparatus for making such stacks and devices. In various embodiments, an anodically coloring layer in an electrochromic stack or device is fabricated to include nickel-tungsten-niobium-oxide (NiWNbO). This material is particularly beneficial in that it is very transparent in its clear state.

The present invention relates to a method of preparation of a garnet-type inorganic material. It also relates to the garnet-type inorganic material itself. The process comprises the following steps: (1) bringing an aqueous solution S comprising (i) a salt of zirconium, (ii) a salt of lanthanum and (iii) a salt of the element A or a precursor of an oxide of element A into contact with an aqueous solution of a basic compound, as a result of which a precipitate suspended in the reaction medium is obtained; (2) stirring the reaction medium obtained at the end of step (1) for at least 30 min; (3) bringing the precipitate obtained at the end of step (2) into contact with an additive selected in the group consisting of: anionic surfactants; nonionic surfactants; polyethylene glycols; carboxylic acids and their salts; and surfactants of the carboxymethylated fatty alcohol ethoxylate type; (4) calcining in air the precipitate recovered at the end of the previous step at a temperature which is at least 400° C.; (5) bringing into contact the product obtained at the end of step (4) with a salt of lithium; (6) calcining in air the product obtained at the end of step (5) at a temperature between 700° C. and 1100° C.; 20 the inorganic compound M comprising or consisting essentially of a garnet oxide or garnet-type oxide containing, as constituent elements, the elements Li, La, Zr and at least one element A selected in the group consisting of Al, Ga, Nb, Fe, W, Ta, or a mixture thereof.

Described are a solid material which has ionic conductivity for lithium ions, a composite comprising said solid material and a cathode active material, a process for preparing said solid material, a solid structure selected from the group consisting of a cathode, an anode and a separator for an electrochemical cell comprising the solid material, and an electrochemical cell comprising such solid structure.

An electrolyte according to the present disclosure contains a lithium composite metal oxide represented by the following compositional formula.
Li.sub.7-xLa.sub.3(Zr.sub.2-xA.sub.x)O.sub.12-yF.sub.y
In the formula, 0.1≤x≤1.0, 0.0<y≤1.0, and A represents two or more types of Ta, Nb, and Sb.

Disclosed are embodiments of tungsten bronze crystal structures that can have both a high dielectric constant and low temperature coefficient. Embodiments of the material can be useful for radiofrequency applications such as resonators and antennas.

According to one embodiment, provided is a nonaqueous electrolyte battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode contains a negative electrode active material containing orthorhombic Na-containing niobium-titanium composite oxide particles represented by general formula (1) Li.sub.2+vNa.sub.2−yM1.sub.xTi.sub.6−y−zNb.sub.yM2.sub.zO.sub.14+δ. In general formula (1), M1 is one or two or more elements selected from the group consisting of Cs, K, Sr, Ba, and Ca, M2 is one or two or more elements selected from the group consisting of Zr, Al, Sn, V, Ta, Mo, W, Fe, Co, and Mn, 0≤v<2, 0≤x<2, 0<y<2, 0≤z<3, and −0.5≤δ≤0.5. The nonaqueous electrolyte contains an Na component in a range of 10 ppm by mass to 3,000 ppm by mass.

A solid electrolyte material for a lithium secondary battery, an electrode, and a battery, relating in particular to an additive material capable of improving rapid transmission of ions in lithium secondary battery electrodes, a preparation method therefor and application thereof, and a solid electrolyte material for a secondary battery, a preparation method therefor and application thereof, as well as an electrode, an electrolyte thin layer, and a preparation method therefor.

Embodiments disclosed herein include potassium sodium niobate (KNN) films and methods of making such films. In an embodiment, a method of forming a potassium sodium niobate (KNN) film comprises preparing a solution comprising water, potassium hexaniobate salts, and sodium hexaniobate salts. In an embodiment, the solution is spin coated onto a substrate to form a film on at least a portion of a surface of the substrate. In an embodiment, the method may further comprise heat treating the film.

An LLZ oxide may be a garnet-type oxide that contains Li, La, Zr and O as main constituent elements, and further contains substituent elements such as Zn in addition to the main constituent elements. The substituent elements may contain Bi, Nb, Hf and the like in addition to Zn. The LLZ-type oxide may be used, for example, as a solid electrolyte for an all-solid-state lithium ion secondary battery. The all-solid-state lithium ion secondary battery includes a positive electrode, a negative electrode, and a solid electrolyte layer that is disposed between the positive electrode and the negative electrode.