The invention relates to a high-air-stability inorganic sulfide solid electrolyte and a preparation method and application thereof. The Sb element is applied to replace part or all of P element in thesulfide electrolyte so as to obtain the electrolyte with higher air stability and higher ion mobility and the electrolyte can be applied to the all-solid-state lithium secondary battery. The obtainedinorganic sulfide electrolyte materials are Li10M(P1-aSba)2S12, Li6 (P1-aSba)S5X, and Li3(P1-aSba)S4, wherein M is one or more of Ge, Si, and Sn, X is one or more of F, Cl, Br and I and 0.01<=a<=1.

High-air-stability inorganic sulfide solid electrolyte and preparation method and application thereof

A solid electrolyte is provided. The solid electrolyte may comprise a compound in which cations including thiophenium and anions including fluorohydrogenate are bonded.

Solid electrolyte, method for preparing same, and self-generating secondary battery including same

The invention relates to a separable and recyclable sulfide type solid electrolyte and application thereof. The sulfide-type solid electrolyte is a P-free Sn-based sulfide, the general formula is LiaSnbAcSd, A is an element for doping and substituting Sn and is selected from at least one of As, Sb, Bi, Si, W and Mo, a is greater than 0 and less than or equal to 4, b is greater than or equal to 0 and less than or equal to 1, c is greater than or equal to 0 and less than or equal to 0.3 and d is equal to 4; the sulfide type solid electrolyte is dissolved in water, the sulfide type solid electrolyte absorbing water is heated, the crystal structure of the heated material is the same as the crystal structure of the original sulfide type solid electrolyte material, and the reduction of the ionicconductivity is less than 5%; and the temperature of the heating treatment is 150-700 DEG C.

Separable and recyclable sulfide type solid electrolyte and application thereof

The invention relates to a solid electrolyte material and an electrochemical device comprising the same. The solid electrolyte material is characterized in that the chemical general formula of the material is Li2+xM2+xM'1-xS6, M is at least one of Al, Ga or In, M' is at least one of Si or Ge, and x is greater than 0 and less than or equal to 0.5. The solid electrolyte material disclosed by the invention is simple in composition, does not contain phosphorus element sensitive to water, also has relatively good Li conduction performance, and is a potential solid electrolyte material.

Phosphorus-free sulfide solid electrolyte

An inorganic sulfide solid electrolyte having high air stability, and a preparation method and use thereof. In the invention, some or all of P elements in a sulfide electrolyte are replaced with Sb elements, thereby providing an electrolyte having high air stability and ion mobility and applicable to an all-solid lithium secondary battery. The resulting inorganic sulfide electrolyte comprises the following materials: Li 10M(P 1-aSb a) 2S 12, Li 6(P 1-aSb a)S 5X and Li 3(P 1-aSb a)S 4, where M is one or more of Ge, Si or Sn, X is one or more of F, Cl, Br or I, and 0.01 ≤ a ≤ 1.

Inorganic sulfide solid electrolyte having high air stability, and preparation method and use thereof

The present invention relates to a solid electrolyte comprising a sulfide-based compound and an all-solid-state battery applied therewith and, more particularly, to a solid electrolyte comprising a sulfide-based compound that is free of phosphorus (P) element but exhibits high ionic conductivity, and an all-solid-state battery applied therewith. The sulfide-based solid electrolyte and the all-solid-state battery applied therewith according to the present invention exhibit improved reactivity to moisture to prevent the generation of toxic gas, resulting in an improvement in safety and stability and do not reduce in ion conductivity even after being left in air, and the solid electrolyte is easy to handle and store thanks to the improved shelf stability thereof.

Sulfide-based solid electrolyte and all-solid-state battery applied therewith

Disclosed are: a method for electrochemical pretreatment of a vanadium positive electrode for lithium secondary batteries, by which, during charging and discharging of a lithium secondary battery using vanadium (V205) as a positive electrode, elution of vanadium is suppressed such that the lifespan characteristics of the positive electrode and the battery can be enhanced; and a vanadium positive electrode for lithium secondary batteries pretreated thereby. The method for electrochemical pretreatment of a vanadium positive electrode for lithium secondary batteries comprises: a) a step for discharging a lithium-free vanadium positive electrode at a voltage of 1.9 V or greater; b) an electrochemical pretreatment step for maintaining, through a potentiostat, the discharged vanadium positive electrode at a starting potential value or a potential value with the maximum current; and c) a step for charging and discharging the pretreated vanadium positive electrode in the voltage range from 2.1 V to 4.0 V.

Method for electrochemical pretreatment of vanadium positive electrode for lithium secondary batteries and vanadium positive electrode for lithium secondary batteries pretreated thereby

Disclosed are a positive electrode active material for a lithium secondary battery and a method for preparing the same, wherein the lifespan characteristics of the battery can be improved by doping vanadium oxide with magnesium ions. The positive electrode active material for a lithium secondary battery contains a compound of chemical formula 1 below, in which a part of vanadium of the vanadium oxide is doped with magnesium ions. [Chemical formula 1] MgaVbOc, wherein 0.01 ≤ a ≤ 0.05, 1 ≤ b ≤ 6, and 2 ≤ c ≤ 13.

Positive electrode active material for lithium secondary battery and method for preparing same

The present invention provides a positive electrode material for a lithium secondary battery comprising a positive electrode active material in which a part of vanadium in vanadium oxide is substituted by molybdenum. In the positive electrode active material, 0.5 to 4.5% of vanadium based on the number of vanadium atoms is substituted with molybdenum. The present invention also provides a lithium secondary battery comprising a positive electrode including the above positive electrode material and a positive electrode current collector; a negative electrode; a separator; and an electrolyte solution.

Positive electrode material for lithium secondary battery and method for manufacturing the same

Provided is positive electrode active material for a lithium secondary battery, the positive electrode active material comprising vanadium oxide doped with zirconium (Zr) ions.The vanadium oxide is doped with 0.1-10 mol% zirconium ions with respect to the former. By applying the positive electrode active material for a lithium secondary battery to same, elution of vanadium from the positive electrode is controlled, and consequently, the lifespan of the battery is extended.

Positive electrode active material for lithium secondary battery, and method for producing positive electrode active material

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