Abstract: A solid electrolyte including a compound represented by Formula 1 or 3, the compound having a glass transition temperature of ?30° C. or less, and a glass or glass-ceramic structure, AQX-Ga1?zMz1(F1?kClk)3?3zZ3z1??Formula 1 wherein, in Formula 1, Q is Li or a combination of Li and Na, K, or a combination thereof, M is a trivalent cation, or a combination thereof, X is a halogen other than F, pseudohalogen, OH, or a combination thereof, Z is a monovalent anion, or a combination thereof, 1<A<5, 0?z<1, 0?z1?1, and 0?k<1, AQX-aMz1Z3z1-bGa1?z(F1?kClk)3?3z??Formula 3 wherein, in Formula 3, Q is Li or a combination of Li and Na, K, or a combination thereof; M is a trivalent cation, or a combination thereof, X is a halogen other than F, pseudohalogen, OH, or a combination thereof, Z is a monovalent anion, or a combination thereof, 0<a?1, 0<b?1, 0<a+b, a+b=4-A, 1<A<5, 0?z<1, 0?z1?1, and 0?k<1.

Abstract: A solid-state ion conductor includes a compound of Formula 1: Li3a+b?(c*n)NaClbXc??Formula 1 wherein, in Formula 1, X is an anion having an average oxidation state of n and is ?3?n??1, and is at least one of Br, I, F, O, S, or P; and 1?a?4, 1?b?3, 0<c?3, and 4.8?(a+b+c)?5.2.

Abstract: A solid electrolyte includes: a crystalline composite, wherein the composite is a compound represented by Formula 1, a compound represented by Formula 2, or a combination thereof: Formula 1: 3LiF—M12O3 wherein, in Formula 1, M1 is an element having an oxidation number of +3, or a combination thereof, with the proviso that M1 is not aluminum or yttrium, Formula 2: 3LiF—M2(OH)3 wherein, in Formula 2, M2 is an element having an oxidation number of +3, or a combination thereof, with the proviso that M2 is not aluminum or yttrium, and the crystalline composite as determined by X-ray diffraction using CuK? radiation, has a primary peak at a diffraction angle of about 35°2? to about 38°°2?, and secondary peaks at a diffraction angle of about 30°2?°2? to about 32°2?, about 57°2? to about 60°2?, and at about 63°2? to about 65°2?.

Abstract: A solid ion conductor including a garnet-type oxide represented by LiAM1BLaCM2DZrEM3FM4GOHXI (Formula 1), a solid electrolyte including the solid ion conductor, an electrochemical device including the ion conductor, and a method of preparing the ion conductor are disclosed. In Formula 1, M1 is a monovalent cation, a divalent cation, a trivalent cation, or a combination thereof, M2 is a monovalent cation, a divalent cation, a trivalent cation, or a combination thereof, M3 is a divalent cation, a trivalent cation, a tetravalent cation, a pentavalent cation, a hexavalent cation, or a combination thereof, M4 is Ir, Ru, Mn, Sn, or a combination thereof, X is a monovalent anion, a divalent anion, a trivalent anion, or a combination thereof, and 6?A?8, 0?B<2, 2.8?C?3, 0?D?0.2, 0<E<2.0, 0<F<2.0, 0<G?0.2, 9?H?12, and 0?I?2 are satisfied.

Abstract: A solid electrolyte includes: a crystalline composite, wherein the composite is a compound represented by Formula 1, a compound represented by Formula 2, or a combination thereof: 3LiF-M12O3??Formula 1 wherein, in Formula 1, M1 is an element having an oxidation number of +3, or a combination thereof, with the proviso that M1 is not aluminum or yttrium, 3LiF-M2(OH)3??Formula 2 wherein, in Formula 2, M2 is an element having an oxidation number of +3, or a combination thereof, with the proviso that M2 is not aluminum or yttrium.

Abstract: A solid-state electrolyte containing a compound represented by Formula 1: (LixM1a)(LayM2b)(ZrzM3c)O12??Formula 1 wherein in Formula 1, M1 is a monovalent cation, a divalent cation, a trivalent cation, or a combination thereof, M2 is a monovalent cation, divalent cation, a trivalent cation, or a combination thereof, M3 is a monovalent cation, a divalent cation, a trivalent cation, a tetravalent cation, a pentavalent cation, a hexavalent cation, or a combination thereof, 6?x?8, 0?a?2, 2?y?3, 0?b?1, 0<z?2, and 0?c?2, wherein in an extended X-ray absorption fine structure spectrum of Zr in the solid-state electrolyte, a ratio of an intensity of a first peak corresponding to an interatomic distance of 1.5±0.5 angstroms and an intensity of a second peak corresponding to an interatomic distance of 3.5±0.5 angstroms is about 0.3 to about 0.75, and an ionic conductivity of the solid-state electrolyte is about 7×10?6 to about 1×10?2 Siemens per centimeter.

Abstract: A solid conductor including: a compound represented by Formula 1, a compound represented by Formula 2, or a combination thereof Li1+x+y-zTa2-xMxP1-yQyO8-zXz??Formula 1 wherein, in Formula 1, M is an element having an oxidation number of +4, Q is an element having an oxidation number of +4, X is a halogen, a pseudohalogen, or a combination thereof, and 0?x?2, 0?y<1, and 0?z?2, except that cases i) x and y and z are simultaneously 0, ii) M is Hf, X is F, x is 1, y is 0, and z is 1, iii) M is Hf, X is Cl, x is 2, y is 0, and z is 2, and iv) M is Hf, X is F, x is 2, y is 0, and z is 2, Li1+x+y-zTa2-xMxP1-yQyO8·zLiX??Formula 2 wherein, in Formula 2, M is an element having an oxidation number of +4, Q is an element having an oxidation number of +4, X is a halogen, a pseudohalogen, or a combination thereof, and 0?x?2, 0?y<1, and 0?z?2, except that cases i) x and y and z are simultaneously 0, ii) M is Hf, X is F, x is 1, y is 0, and z is 1, iii) M is Hf, X is Cl, x is 2, y is 0, and z is 2, and iv)

Abstract: A composite solid electrolyte including a first solid electrolyte layer including a halide solid electrolyte, a second solid electrolyte layer including an oxide solid electrolyte, a lithium ion-conductive interlayer between the first solid electrolyte layer and the second solid electrolyte layer, wherein the lithium ion-conductive interlayer includes a composition in which a reaction energy of the lithium ion-conductive interlayer with respect to the first solid electrolyte is ?50 meV/atom or greater.

Abstract: A composite solid electrolyte including: a porous nanostructure; and a solid electrolyte disposed on a surface of the porous nanostructure, wherein the composite solid electrolyte satisfies Equation 1 0<TSE/D<4??Equation 1 wherein TSE is a thickness of the solid electrolyte, and D is an average diameter of pores of the porous nanostructure.

Abstract: An electrolyte including a compound, the compound represented by Formula 1: LiwAlxSyO4??Formula 1 wherein, in Formula 1, 2.9?w?4.7, 0.3?x?0.9, and 0.1?y?0.7, and wherein the compound is amorphous.

Abstract: A solid-state electrolyte including: a compound represented by Formula 1 Li5-4yAl1-yXyO4-4y-???Formula 1 wherein in Formula 1, 0.1?y?0.8 and 0??<1, and X is Cl, Br, or a combination thereof, and wherein the compound is amorphous.

Abstract: Provided herein is a lithium battery including: a cathode including a cathode active material; an anode including an anode active material; an electrolyte between the cathode and the anode; and a separator impregnated with the electrolyte, wherein the separator includes carboxyl group-containing microbial cellulose nanofibers, and wherein a differential scanning calorimetry (DSC) thermogram of the separator evinces an exothermic reaction peak, represented by a differential value (dH/dT), at a temperature in a range of about 150° C. to about 200° C.

Abstract: A positive electrode includes a composite material including a positive active material and a coating layer on a surface of the positive active material, wherein the coating layer includes a copolymer including a first repeating unit represented by Formula 1 below and a second repeating unit represented by Formula 2 below: wherein Ar1, R1 to R6, A, A1, Y?, m, and n are the same as defined in the specification.

Abstract: A compound represented by Formula 1: Li4+dH+hSr2?xM1a+xZr1?yM2b+yO6?zXc?z, wherein in Formula 1, M1 is a cationic dopant in Sr site with a valance of a+; a is 1, 2 or 3; M2 is a cationic dopant in Zr site with a valance of b+; b is 2, 3, 4 or 5; X is an anion dopant in O site with a valence of c?; c is 1, 2, or 3; 0?h?2, 0?x?2, 0?y?1, 0?z?0.5, x+y+z+h?0, d=(2?a)*x+(4?b)*y?(2?c)*z?h, and d?0.

Abstract: An oxide including a compound represented by Formula 1: (LixM1y)(M2)3-?(M3)2-?O12-zXz??Formula 1 wherein, in Formula 1, 6?x?8, 0?y<2, ?0.2???0.2, ?0.2???0.2, and 0?z?2; M1 is a monovalent cation, a divalent cation, a trivalent cation, or a combination thereof; M2 is a monovalent cation, a divalent cation, a trivalent cation, or a combination thereof; M3 is a monovalent cation, a divalent cation, a trivalent cation, a tetravalent cation, a pentavalent cation, a hexavalent cation, or a combination thereof; wherein at least one of M1, M2, or M3 includes at least four elements; and X is a monovalent anion, a divalent anion, a trivalent anion, or a combination thereof.

Abstract: A solid conductor including: a compound represented by Formula 1, a compound represented by Formula 2, or a combination thereof Li1+x+y-zTa2-xMxP1-yQyO8-zXz??Formula 1 wherein, in Formula 1, M is an element having an oxidation number of +4, Q is an element having an oxidation number of +4, X is a halogen, a pseudohalogen, or a combination thereof, and 0?x?2, 0?y<1, and 0?z?2, except that cases i) x and y and z are simultaneously 0, ii) M is Hf, X is F, x is 1, y is 0, and z is 1, iii) M is Hf, X is Cl, x is 2, y is 0, and z is 2, and iv) M is Hf, X is F, x is 2, y is 0, and z is 2, Li1+x+y-zTa2-xMxP1-yQyO8·zLiX??Formula 2 wherein, in Formula 2, M is an element having an oxidation number of +4, Q is an element having an oxidation number of +4, X is a halogen, a pseudohalogen, or a combination thereof, and 0?x?2, 0?y<1, and 0?z?2, except that cases i) x and y and z are simultaneously 0, ii) M is Hf, X is F, x is 1, y is 0, and z is 1, iii) M is Hf, X is Cl, x is 2, y is 0, and z

Abstract: A solid-state ion conductor includes a compound of Formula 1: Li3a+b?(c*n)NaClbXc??Formula 1 wherein, in Formula 1, X is an anion having an average oxidation state of n and is ?3?n??1, and is at least one of Br, I, F, O, S, or P; and 1?a?4, 1?b?3, 0<c?3, and 4.8?(a+b+c)?5.2.

Abstract: A solid electrolyte including a compound represented by Formula 1 or 3, the compound having a glass transition temperature of -30° C. or less, and a glass or glass-ceramic structure, wherein, in Formula 1, Q is Li or a combination of Li and Na, K, or a combination thereof, M is a trivalent cation, or a combination thereof, X is a halogen other than F, pseudohalogen, OH, or a combination thereof, Z is a monovalent anion, or a combination thereof, 1<A<5, 0?z<1, 0?z1?1, and 0?k<1, wherein, in Formula 3, Q is Li or a combination of Li and Na, K, or a combination thereof; M is a trivalent cation, or a combination thereof, X is a halogen other than F, pseudohalogen, OH, or a combination thereof, Z is a monovalent anion, or a combination thereof, 0<a?1, 0<b?1, 0<a+b, a+b=4-A, 1<A<5, 0?z<1, 0?z1?1, and 0?k<1.

Abstract: An all-solid secondary battery, including: a cathode; an anode; and a solid electrolyte layer disposed between the cathode and the anode, wherein the anode comprises an anode current collector; a first anode active material layer in contact with the anode current collector and comprising a first metal; a second anode active material layer disposed between the first anode active material layer and the solid electrolyte layer and comprising a carbon-containing active material; and a contact layer between the second anode active material layer and the solid electrolyte layer, and disposed such that the contact layer prevents contact between the second anode active material layer and the solid electrolyte layer, wherein the contact layer comprises a second metal, and has a thickness less than a thickness of the first anode active material layer.

Abstract: A solid conductor including: a compound represented by Formula 1, a compound represented by Formula 2, or a combination thereof Li1+x+y?zTa2?xMxP1?yQyO8?zXz??Formula 1 wherein, in Formula 1, M is an element having an oxidation number of +4, Q is an element having an oxidation number of +4, X is a halogen, a pseudohalogen, or a combination thereof, and 0?x?2, 0?y<1, and 0?z?2, except that cases i) x and y and z are simultaneously 0, ii) M is Hf, X is F, x is 1, y is 0, and z is 1, iii) M is Hf, X is Cl, x is 2, y is 0, and z is 2, and iv) M is Hf, X is F, x is 2, y is 0, and z is 2, Li1+x+y?zTa2?xMxP1?yQyO8·zLiX??Formula 2 wherein, in Formula 2, M is an element having an oxidation number of +4, Q is an element having an oxidation number of +4, X is a halogen, a pseudohalogen, or a combination thereof, and 0?x?2, 0?y<1, and 0?z2, except that cases i) x and y and z are simultaneously 0, ii) M is Hf, X is F, x is 1, y is 0, and z is 1, iii) M is Hf, X is Cl, x is 2, y is 0, and z is 2, and iv)