A cathode material may include a coating layer capable of preventing transition metal cations from being diffused between a cathode active material and a solid electrolyte when an all-solid state battery is charged and discharged, and a method for preparing the same.

The present invention relates to a method of making a mercury based compound, to a mercury based compound and to methods of using the mercury based compound and to uses of the mercury based compound.

In general, according to one embodiment, there is provided an active material. The active material contains a composite oxide having an orthorhombic crystal structure. The composite oxide is represented by a general formula of Li.sub.2+wNa.sub.2xM1.sub.yTi.sub.6zM2.sub.zO.sub.14+. In the general formula, the M1 is at least one selected from the group consisting of Cs and K; the M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn, and Al; and w is within a range of 0w4, x is within a range of 0<x<2, y is within a range of 0y<2, z is within a range of 0<z6, and is within a range of 0.50.5.

The present disclosure provides solid electrolyte materials having high lithium ion conductivity. A solid electrolyte material according to the present disclosure consists essentially of Li, M, O, and X. M is at least one element selected from the group consisting of Nb and Ta. X is at least one element selected from the group consisting of Cl, Br, and I.

A compound has a monoclinic crystal structure in which, in an X-ray diffraction chart obtained by performing measurement using CuK? ray at 25? C., a half value width of a reflection peak having the greatest peak height in a 2? angle range of 10 to 18? is 0.05 to 0.35?, and which contains lithium, a metal element M other than lithium, chlorine and a dopant element X, in which a molar content of lithium is 20 to 40 mol %, a molar content of chlorine is 50 to 70 mol %, and an activation energy is 0.380 eV or less.

Molten lithium-sulfur and lithium-selenium electrochemical cells are disclosed. A solid electrolyte separates a molten lithium metal or molten lithium metal alloy 106 from a molten sulfur or molten selenium. The molten lithium-sulfur and lithium-selenium cells have low over potential, no side reaction, and no dendrite growth. These cells have high Coulombic efficiency and energy efficiency and thus provide new chemistries to construct high-energy, high-power, long-lifetime, low-cost and safe energy storage systems.

A dielectric material, a method of manufacturing thereof, and a dielectric device and an electronic device including the same. A dielectric 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 the monolayer nanosheets, or a combination thereof, wherein the dielectric material includes a two-dimensional layered material having a two-dimensional crystal structure and the two-dimensional layered material is represented by Chemical Formula 1.

According to one embodiment, there is provided an active substance. The active substance includes particles of niobium titanium composite oxide and a phase including a carbon material. The niobium titanium composite oxide is represented by Ti.sub.1xM1.sub.xNb.sub.2yM2.sub.yO.sub.7. The phase is formed on at least a part of the surface of the particles. The carbon material shows, in a Raman chart obtained by Raman spectrometry, a G band observed at from 1530 to 1630 cm.sup.1 and a D band observed at from 1280 to 1380 cm.sup.1. A ratio I.sub.G/I.sub.D between a peak intensity I.sub.G of the G band and a peak intensity I.sub.D of the D band is from 0.8 to 1.2.

A solid state ionic conductive electrolyte membrane may include a multi-channel porous support structure and a solid-state ionic conductive electrolyte. The multi-channel porous support structure may define a porous wall structure separating a first plurality of channels from a second plurality of channels, and a solid-state ionic conductive electrolyte may be positioned within pores of the porous wall structure of the multi-channel structure.

Provided is a complex oxide that has a space group I-43d, has a high hydrogen content, contains almost no impurity phase, exhibits almost no aluminum substitution in the structure thereof, and is suitable for proton conductivity. This complex oxide is represented by a chemical formula Li.sub.7-x-yH.sub.xLa.sub.3Zr.sub.2-yM.sub.yO.sub.12 (M represents Ta and/or Nb, 3.2<x7-y, and 0.25<y<2) and is a single phase of a garnet type structure belonging to a cubic system, and the crystal structure thereof is a space group I-43d.