A sulfide-based solid electrolyte contains a nickel (Ni) element and a halogen element. For example, a sulfide-based solid electrolyte can include, with respect to 100 parts by mole of a mixture of lithium sulfide (Li.sub.2S) and diphosphorus pentasulfide (P.sub.2S.sub.5), 5 parts by mole to 20 parts by mole of nickel sulfide (Ni.sub.3S.sub.2), and 5 parts by mole to 40 parts by mole of lithium halide.

The invention relates to a fire-resistant ceramic product, a batch for manufacturing a product of said type, and a process for manufacturing a product of said type.

A novel sulfide solid electrolyte containing Li, P, S, and a halogen, which can be used as a solid electrolyte for a lithium secondary battery or the like, and is able to suppress the generation of a hydrogen sulfide gas even when exposed to moisture in the atmosphere. The sulfide solid electrolyte comprises a crystal phase or a compound having an argyrodite-type structure and containing Li, P, S, and a halogen; and a compound composed of Li, Cl, and Br and having a peak at each position of 2=29.10.5 and 33.70.5 in an X-ray diffraction pattern.

Disclosed is a thermoelectric composite material includes a thermoelectric material including crystal grains; and a MXene inserted at boundaries of the crystal grains consisting of the thermoelectric material. Accordingly, the thermoelectric composite material may have a reduced thermal conductivity and an increased electrical conductivity. Furthermore, mechanical properties of the thermoelectric composite material may be improved. Thus, the thermoelectric composite material may improve the thermoelectric ability of a thermoelectric module including the same. A method of manufacturing the thermoelectric composite material includes coating MXene on a surface of a thermoelectric material powder including crystal grains; and sintering the thermoelectric material powder coated with the MXene to form a sintered body including the MXene inserted at boundaries of the crystal grains consisting of the thermoelectric material.

The invention discloses a method of making waterproof magnesium oxychloride refractory brick by fly ash from municipal solid waste incineration. The method comprises the following steps: (1) sulfur-containing compound and water are mixed into the fly ash and stirred evenly to make stabilized slurry, the heavy metals are stabilized and CaO is turned to Ca(OH).sub.2 during this process. (2) The aqueous solution of MgO and MgCl.sub.2 is added into the stabilized slurry to make magnesium oxychloride slurry by being stirred evenly. (3) The magnesium oxychloride slurry is cured to make magnesium oxychloride gel, (4) and the magnesium oxychloride aggregate is prepared by crushing the magnesium oxychloride gel. (5) The blended slurry is prepared by mixing metastable material, alkali metal hydroxide, Na.sub.2SiO.sub.3, magnesium oxychloride aggregate and water, (6) after being stirred, molded and cured, the waterproof magnesium oxychloride refractory brick is obtained. The waterproof magnesium oxychloride refractory brick made by this invention combines two materials, the geopolymer gel and the magnesium oxychloride gel, which possess different properties of fire resistance and water resistance. It is confirmed that the coexistence of geopolymer gel and magnesium oxychloride gel achieves the multi-stage solidification and stabilization of heavy metals and improving the water resistance of magnesium oxychloride refractory brick.

A method for treating a smectite clay, a smectite clay obtained by said method and the various uses of the treated smectite clay.

A complex ceramic particle and ceramic composite material may be made of a pretreated coal dust and a polymer derived ceramic that is mixed together and pyrolyzed in a nonoxidizing atmosphere. Constituent portions of the particle mixture chemically react causing particles to increase in density and reduce in size during pyrolyzation, yielding a particle suitable for a plurality of uses including composite articles and proppants.

The present invention provides an energy storage device comprising a cathode region or other element. The device has a major active region comprising a plurality of first active regions spatially disposed within the cathode region. The major active region expands or contracts from a first volume to a second volume during a period of a charge and discharge. The device has a catholyte material spatially confined within a spatial region of the cathode region and spatially disposed within spatial regions not occupied by the first active regions. In an example, the catholyte material comprises a lithium, germanium, phosphorous, and sulfur (LGPS) containing material configured in a polycrystalline state. The device has an oxygen species configured within the LGPS containing material, the oxygen species having a ratio to the sulfur species of 1:2 and less to form a LGPSO material. The device has a protective material formed overlying exposed regions of the cathode material to substantially maintain the sulfur species within the catholyte material. Also included is a novel dopant configuration of the Li.sub.aMP.sub.bS.sub.c (LMPS) [M=Si,Ge, and/or Sn] containing material.

Provided is a cold storage material having a large thermal capacity in a ultra-low temperature range of 10 K or less and being highly durable against thermal shock and mechanical vibration. The cold storage material contains a rare earth oxysulfide ceramic represented by the general formula R.sub.2O.sub.2S (wherein R is one or more kinds of rare earth elements selected from La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y), and Al.sub.2O.sub.3 having a specific surface area of 0.3 m.sup.2/g to 11 m.sup.2/g is added to the cold storage material.

A 3D printing method includes mixing a sintered component which is selected from the group comprising ceramic materials, ceramic material combinations, metal materials, metal material combinations and metal alloys, with at least one surface coating component which is selected from the group comprising boron nitride, graphene, carbon nanotubes, tungsten sulfide, tungsten carbide, molybdenum sulfide, molybdenum carbide, calcium fluoride, caesium molybdenum oxide sulfide, titanium silicon carbide and cerium fluoride, in a powder mixture; and laser sintering or laser melting the powder mixture in a selective laser sintering method or a selective laser melting method.