A graphene-enabled hybrid particulate for use as a lithium-ion battery anode active material, wherein the hybrid particulate is formed of a single or a plurality of graphene sheets and a single or a plurality of fine primary particles of a niobium-containing composite metal oxide, having a size from 1 nm to 10 μm, and the graphene sheets and the primary particles are mutually bonded or agglomerated into the hybrid particulate containing an exterior graphene sheet or multiple exterior graphene sheets embracing the primary particles, and wherein the hybrid particulate has an electrical conductivity no less than 10.sup.−4 S/cm and said graphene is in an amount of from 0.01% to 30% by weight based on the total weight of graphene and the niobium-containing composite metal oxide combined.

According to one embodiment, an electrode is provided. The electrode includes the active material-containing layer formed on the current collector and including active material particles. The particle size distribution chart obtained by the laser diffraction scattering method for the active material particles includes the first region and the second region. The first particle group included in the first region includes the first active material particles, and the second particle group included in the second region includes second active material particles. The carbon coverage of the first particle group is higher than the carbon coverage of the second particle group.

The disclosure relates to a method for producing a solid-state lithium ion conductor material in which the use of water and/or steam is a medium when the obtained intermediate product is cooled or quenched and, if needed, comminution of the intermediate product and/or carrying out of a cooling process with the production of a powder in one comminution step or in a plurality of comminution steps leads or lead to especially advantageous production products. The subject of the disclosure is also the solid-state lithium ion conductor material that has an ion conductivity of at least 10.sup.−5 S/cm at room temperature as well as a water content of <1.0 wt %. The disclosure further relates to the use of the solid-state lithium ion conductor material in the form of a powder in batteries or rechargeable batteries, preferably lithium batteries or rechargeable lithium batteries, in particular, separators, cathodes, anodes, or solid-state electrolytes.

To provide a piezoelectric body film and a piezoelectric element from which an excellent piezoelectric characteristic can be obtained even in a high-temperature environment and a method for manufacturing a piezoelectric element. A piezoelectric body film of the present invention is a piezoelectric body film containing a perovskite-type oxide represented by Formula (1), in which a content q of Nb with respect to the number of all atoms in the perovskite-type oxide and a ratio r of a diffraction peak intensity from a (200) plane to a diffraction peak intensity from a (100) plane of the perovskite-type oxide, which is measured using an X-ray diffraction method, satisfy Formula (2), Formula (1) A.sub.1+δ[(Zr.sub.yTi.sub.1-y).sub.1-xNb.sub.x]O.sub.2, Formula (2) 0.35≤r/q<0.58, in this case, in Formula (1), A represents an A site element containing Pb, x and y each independently represent a numerical value of more than 0 and less than 1, standard values of δ and z each are 0 and 3, but these values may deviate from the standard values as long as the perovskite-type oxide has a perovskite structure, and, in Formula (2), a unit of q is atm %.

Processes for preparing a niobate material are provided, in which the processes include the following steps: (i) providing a niobium-containing source; (ii) providing a transitional metal source (TMS), a post-transitional metal source (PTMS), or both; (iii) dissolving (a) the niobium-containing source, and (b) the TMS, the PTMS, or both in an aqueous medium to form an intermediate solution; (iv) forming an intermediate paste by admixing an inert support material with the intermediate solution; (v) optionally coating the intermediate paste on a support substrate; and (vi) removing the inert support material by subjecting the intermediate paste to a calcination process and providing a transition-metal-niobate (TMN) and/or a post-transition-metal-niobate (PTMN). Anodes including a TMN and/or PTMN are also provided.

A solid electrolyte according to the present disclosure is represented by the following compositional formula (1).
Li.sub.7-x(La.sub.3-zY.sub.z)(Zr.sub.2-xM.sub.x)O.sub.12  (1) In the formula (1), x and z satisfy 0.00<x<1.10, and 0.00<z≤0.15, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

Processes for preparing a niobate material are provided, in which the processes include the following steps: (i) providing a niobium-containing source; (ii) providing a transitional metal source (TMS), a post-transitional metal source (PTMS), or both; (iii) dissolving (a) the niobium-containing source, and (b) the TMS, the PTMS, or both in an aqueous medium to form an intermediate solution; (iv) forming an intermediate paste by admixing an inert support material with the intermediate solution; (v) optionally coating the intermediate paste on a support substrate; and (vi) removing the inert support material by subjecting the intermediate paste to a calcination process and providing a transition-metal-niobate (TMN) and/or a post-transition-metal-niobate (PTMN). Anodes including a TMN and/or PTMN are also provided.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material comprising a mixture of (a) at least one lithium titanium oxide and (b) at least one mixed niobium oxide, wherein the mixed niobium oxide is expressed by the general formula [M1].sub.x[M2].sub.(1-x)[Nb].sub.y[O].sub.z.

A ternary paraelectric having a Cc structure and a method of manufacturing the same are provided. The ternary paraelectric having a Cc structure includes a material having a chemical formula of A.sub.2B.sub.4O.sub.11 that has a monoclinic system, is a space group No. 9, and has a dielectric constant of 150 to 250, wherein “A” is a Group 1 element, and “B” is a Group 5 element. “A” may include one of Na, K, Li and Rb. “B” may include one of Nb, V, and Ta. The A.sub.2B.sub.4O.sub.11 material may be Na.sub.2Nb.sub.4O.sub.11 in which bandgap energy thereof is greater than that of STO. The A.sub.2B.sub.4O.sub.11 material may have relative density that is greater than 90% or more.

A two-dimensional perovskite material, a dielectric material including the same, and a multi-layered capacitor. The two-dimensional perovskite material includes a layered metal oxide including a first layer having a positive charge and a second layer having a negative charge which are laminated, a monolayer nanosheet exfoliated from the layered metal oxide, a nanosheet laminate of a plurality of the monolayer nanosheets, or a combination thereof, wherein the two-dimensional perovskite material a first phase having a two-dimensional crystal structure is included in an amount of greater than or equal to about 80 volume %, based on 100 volume % of the two-dimensional perovskite material, and the two-dimensional perovskite material is represented by Chemical Formula 1.