Abstract: An all-solid secondary battery includes a solid electrolyte layer disposed between an anode layer and a cathode layer, where the solid electrolyte layer contains a first solid electrolyte layer including a first solid electrolyte and a second electrolyte layer including a second solid electrolyte, where the first solid electrolyte is disposed proximate to the anode layer, the second solid electrolyte layer is disposed proximate to the cathode layer, and the first solid electrolyte has a lithium ion conductivity greater than a lithium ion conductivity of the second solid electrolyte, where a difference between the lithium ion conductivity of the first solid electrolyte and the lithium ion conductivity of the second solid electrolyte is equal to or greater than about 2 mS/cm.

Abstract: An all-solid secondary battery includes a solid electrolyte layer disposed between an anode layer and a cathode layer, where the solid electrolyte layer contains a first solid electrolyte layer including a first solid electrolyte and a second electrolyte layer including a second solid electrolyte, where the first solid electrolyte is disposed proximate to the anode layer, the second solid electrolyte layer is disposed proximate to the cathode layer, and the first solid electrolyte has a lithium ion conductivity greater than a lithium ion conductivity of the second solid electrolyte, where a difference between the lithium ion conductivity of the first solid electrolyte and the lithium ion conductivity of the second solid electrolyte is equal to or greater than about 2 mS/cm.

Abstract: An all-solid secondary battery includes a solid electrolyte layer disposed between an anode layer and a cathode layer, where the solid electrolyte layer contains a first solid electrolyte layer including a first solid electrolyte and a second electrolyte layer including a second solid electrolyte, where the first solid electrolyte is disposed proximate to the anode layer, the second solid electrolyte layer is disposed proximate to the cathode layer, and the first solid electrolyte has a lithium ion conductivity greater than a lithium ion conductivity of the second solid electrolyte, where a difference between the lithium ion conductivity of the first solid electrolyte and the lithium ion conductivity of the second solid electrolyte is equal to or greater than about 2 mS/cm.

Abstract: This disclosure relates to a flexible membrane of sulfide solid electrolyte. In one embodiment, the flexible membrane has a bending strain of no less than 0.1%. In one embodiment, the flexible membrane has a lithium-ion conductivity of no less than 0.5 mS/cm. The bending strain is calculated according to the formula ?M=h/(2r), wherein h is thickness of the membrane and r is a bending radius corresponding to the membrane without any observable kinks, wrinkles, cracks, or damages.

Abstract: Disclosed is a prismatic cell assembly, comprising a housing, a stacked sheets (or layers) comprising electrode and solid electrolyte, and a pre-deformed elastic body placed on the top or bottom of or sandwiched within the stacked sheets, wherein the compressed or deformed elastic body exerts an internal compression among the stacked sheets. In one embodiment, the housing is formed by welding a first plate and a second plate. In one embodiment, the cell assembly exhibits an improved electrochemical performance and longer lifetime.

Abstract: Disclosed is a cathode composite layer for an all solid-state battery, comprising particles of a cathode active material (CAM), a solid electrolyte (SE), an electrically conductive carbon fiber coated with an oxide material. In one embodiment, the present disclosure provides an all solid-state battery comprising the cathode composite layer, wherein the battery has an increased capacity and cycle stability due to the reduced SE degradation.

Abstract: Provided are an all-solid secondary battery and a method of manufacturing the same, the all-solid secondary battery including: an anode layer; a cathode layer; and a solid electrolyte layer between the anode layer and the cathode layer, wherein the cathode layer contains a large-particle cathode active material, a small-diameter cathode active material, and a solid electrolyte, the solid electrolyte layer includes a first solid electrolyte layer adjacent to the cathode layer and containing a first solid electrolyte, and a second solid electrolyte layer adjacent to the anode layer and containing a second electrolyte, the second solid electrolyte has a larger size than the solid electrolyte of the cathode layer or the first solid electrolyte, and the second solid electrolyte has higher ion conductivity than the first solid electrolyte.

Abstract: A composite electrolyte includes: a positively charged particle, a particle that is positively charged by having a coordinate bond with a cation, or a combination thereof; and a lithium salt.

Abstract: A composite electrolyte includes: a positively charged particle, a particle that is positively charged by having a coordinate bond with a cation, or a combination thereof; and a lithium salt.

Abstract: A composite separator includes: a porous substrate; and a composite electrolyte on a surface of the porous substrate, the composite electrolyte including block copolymer, an ionic liquid, and a particle, wherein a size of the particle is larger than a pore size of the porous substrate, the particle includes an organic particle, an inorganic particle, an organic-inorganic particle, or a combination thereof, and the particle has a particle size of greater than about 1 micrometer to about 100 micrometers.

Abstract: An anodeless lithium metal battery includes: a cathode including a cathode current collector and a cathode active material layer on the cathode current collector; an anode current collector on the cathode; and a composite electrolyte between the cathode and the anode current collector, wherein the composite electrolyte includes a first liquid electrolyte and at least one of lithium metal or a lithium metal alloy.

Abstract: An electrolyte for a secondary battery, the electrolyte including an ionic liquid polymer including a repeating unit represented by Formula 1: wherein, in Formula 1, CY, R1, R2, R3, X1?, n, and m are the same as described in the specification.

Abstract: An anodeless coating layer for an all-solid battery, the anodeless coating layer includes: an anode active material capable of forming an alloy with lithium or a compound with lithium; and a binder, wherein the binder includes a block copolymer including a conductive domain, a non-conductive domain, or a combination thereof, and wherein the conductive domain includes an ion-conductive domain, an electron-conductive domain, or a combination thereof.

Abstract: An anodeless lithium metal battery includes: a cathode including a cathode current collector and a cathode active material layer on the cathode current collector; an anode current collector on the cathode; and a composite electrolyte between the cathode and the anode current collector, wherein the composite electrolyte includes a first liquid electrolyte and at least one of lithium metal or a lithium metal alloy.

Abstract: An all-solid secondary battery includes: a positive electrode including a positive electrode active material layer; a negative electrode including a negative electrode current collector and a negative electrode active material layer on the negative electrode current collector; and a solid electrolyte layer between the positive electrode active material layer and the negative electrode active material layer, wherein the negative electrode active material layer includes first particles including a carbon material, and second particles including a metallic material that does not alloy with lithium metal.

Abstract: An all-solid secondary battery including: a cathode; an anode; and a solid electrolyte layer interposed between the cathode and the anode, wherein the cathode includes a cathode active material, wherein the anode includes an anode current collector and an anode active material layer on the anode current collector, wherein the anode active material layer includes a binder and an anode active material that does not include an alkali metal, wherein the binder includes a polymer main chain and a polyvinyl alcohol-containing copolymer, and wherein the polymer main chain includes polyvinyl alcohol, a polyvinyl alcohol derivative, or a combination thereof, and the polyvinyl alcohol-containing copolymer has at least one repeating unit linked to the polymer main chain.

Abstract: A solid ion conductor compound including Li, Ho, and a halogen element, wherein the compound has diffraction peaks at 30°2? to 33°2?, 33°2? to 36°2?, 40°2? to 44°2?, and 48°2? to 52°28?, when analyzed using CuK? radiation, and wherein a full width at half maximum of at least one peak at 40°2? to 44°2? is 0.3°2? or greater.

Abstract: An anode, a lithium battery including the anode, and a method of preparing the anode. The anode includes a current collector; a first anode layer disposed on the current collector; a second anode layer disposed on the first anode layer; and an inorganic protection layer disposed on the second anode layer, wherein an oxidation/reduction potential of the first anode layer and an oxidation/reduction potential of the second anode layer are different from each other.

Abstract: An all-solid-state secondary battery includes: a cathode layer including a cathode active material, an anode layer including an anode current collector and an anode active material layer disposed on the anode current collector, the anode active material layer including an anode active material and amorphous carbon, and a solid electrolyte layer disposed between the cathode active material layer and the anode active material layer, wherein a weight ratio of the anode active material to the amorphous carbon is 1:3 to 1:1, and the anode layer has sheet resistance of about 0.5 milliohms-centimeters or less.

Abstract: A membrane-electrode assembly for a lithium battery includes: a cathode including a cathode current collector and a composite cathode active material layer on the cathode current collector, wherein the composite cathode active material layer includes a cathode active material and a first electrolyte including a high concentration lithium salt and a first ionic liquid; an electrolyte reservoir layer on a surface of the cathode, wherein the electrolyte reservoir layer includes a second electrolyte including a polymer and a second ionic liquid; and a solid electrolyte on a surface of the electrolyte reservoir layer.