There is provided a sulfide solid electrolyte containing elemental lithium (Li), elemental phosphorus (P), elemental sulfur (S), and an elemental halogen (X). The mole ratio of the elemental lithium (Li) to the elemental phosphorus (P), Li/P, satisfies 3.7<Li/P<5.4. The mole ratio of the elemental sulfur (S) to the elemental phosphorus (P), S/P, satisfies 3.9<S/P<4.1. The mole ratio of the elemental halogen (X) to the elemental phosphorus (P), X/P, satisfies 0.7<X/P<2.4. The sulfide solid electrolyte includes a crystalline phase having an argyrodite-type crystal structure.

The present invention relates to a nitrogen-doped sulfide-based solid electrolyte for all-solid batteries. The a nitrogen-doped sulfide-based solid electrolyte for all-solid batteries includes a compound with an argyrodite-type crystal structure represented by the following Formula 1:
Li.sub.aPS.sub.bN.sub.cX.sub.d  [Formula 1] wherein 6≤a≤7, 3≤b≤6, 0≤c≤1, 0≤d≤2, and each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).

The present invention relates to a nitrogen-doped sulfide-based solid electrolyte for all-solid batteries. The a nitrogen-doped sulfide-based solid electrolyte for all-solid batteries includes a compound with an argyrodite-type crystal structure represented by the following Formula 1:
Li.sub.aPS.sub.bN.sub.cX.sub.d  [Formula 1] wherein 6≤a≤7, 3≤b≤6, 0≤c≤1, 0≤d≤2, and each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).

A method for producing calcium lanthanum sulfide (CLS) nano powder and optical ceramics formed therefrom. The method includes the steps of mixing a lanthanum precursor and calcium precursor in water to obtain a solution and adding a sulfide precursor to the solution. Upon adding the sulfide precursor, stirring the solution for 5-25 minutes at 55-95° C. to obtain a mixture. The mixture is then introduced into a muffle furnace, preheated at 400-600° C., and the mixture is kept for 15-50 minutes to obtain nano powder. The nano powder can be annealed and subjected to spark plasma sintering to obtain the optical ceramics.

A method for producing calcium lanthanum sulfide (CLS) nano powder and optical ceramics formed therefrom. The method includes the steps of mixing a lanthanum precursor and calcium precursor in water to obtain a solution and adding a sulfide precursor to the solution. Upon adding the sulfide precursor, stirring the solution for 5-25 minutes at 55-95° C. to obtain a mixture. The mixture is then introduced into a muffle furnace, preheated at 400-600° C., and the mixture is kept for 15-50 minutes to obtain nano powder. The nano powder can be annealed and subjected to spark plasma sintering to obtain the optical ceramics.

A solid electrolyte, in which a part of an element contained in a mobile ion-containing material is substituted, and an occupied impurity level that is occupied by electrons or an unoccupied impurity level that is not occupied by electrons is provided between a valence electron band and a conduction band of the mobile ion-containing material, and a smaller energy difference out of an energy difference between a highest level of energy in the occupied impurity level and an energy and a LUMO level difference between a lowest level of energy in the unoccupied impurity level and a HOMO level is greater than 0.3 eV.

A method for forming a sintered composition including providing a slurry precursor including a lithium-, sodium-, or magnesium-based compound; tape casting the slurry precursor to form a green tape; and sintering the green tape at a temperature in a range of 500° C. to 1350° C. for a time in a range of less than 60 min to form a sintered composition, such that the slurry precursor further includes a solvent and dispersant. The dispersant may include an amine compound, a carboxylic acid compound, or combinations, mixtures, or salts thereof.

Paste compositions for additive manufacturing and methods for the same are provided. The paste composition may include an organic vehicle, and one or more powders dispersed in the organic vehicle. The organic vehicle may include a solvent, a polymeric binder, a thixotropic additive, and a dispersant. The organic vehicle may be configured to provide the paste composition with a suitable viscosity. The organic vehicle may also be configured to provide a stable paste composition for a predetermined period of time.

An antimicrobial material including a substrate and an antimicrobial mixed metal oxide, mixed metal sulfide, or mixed metal oxysulfide in and/or on the substrate is described, as well as antimicrobial coating materials and coatings formed therefrom. The antimicrobial material may be constituted in an antimicrobial surface of a surface-presenting substrate, to combat transmission and spread of microbial disease, e.g., disease mediated by microbial pathogens such as bacteria, viruses, and fungi. Antimicrobial mixed metal oxide, mixed metal sulfide, or mixed metal oxysulfide as described may be contacted with microorganisms to effect inactivation thereof.

Disclosed is a sintered body comprising (a) a matrix material comprising at least one selected from ZnS and ZnSe, (b) an oxide that is present in a form of islands in the matrix material, comprising at least one metal selected from the group consisting of Ca, Sr and Ba, and (c) pores that are present in a form of islands in the matrix material. The sintered body has sufficient strength and an infrared stealth effect in an infrared region such as a MWIR and LWIR region.