Abstract: The present invention relates to a positive electrode active material for a lithium-sulfur battery containing polyimide, more specifically, a positive electrode active material formed by complexing the composite of polyimide and carbon-based secondary particles with sulfur particles, a preparation method thereof and a lithium-sulfur battery comprising the same. If the positive electrode active material formed by including and complexing the polyimide according to the present invention is applied to the lithium-sulfur battery, the elution of the polysulfide is suppressed, and thus lifetime characteristics and energy efficiency are improved.

Abstract: The present disclosure relates to an electrolyte for a lithium secondary battery, and in particular, to a liquid electrolyte capable of stabilizing lithium metal and suppressing lithium dendrite growth, and a lithium secondary battery including the same. The lithium secondary battery provided with the electrolyte according to the present disclosure has an excellent cycle-dependent capacity retention rate, and accordingly, is effective in improving a battery lifespan property.

Abstract: 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.

Abstract: Disclosed are: a non-aqueous electrolyte for a lithium secondary battery containing 1-20 parts by weight of a cyano group-containing pyrimidine-based compound on the basis of 100 parts by weight of an organic solvent; and a lithium secondary battery comprising the same.

Abstract: The present invention may improve the lifetime characteristics of a lithium secondary battery, and particularly, may provide a non-aqueous electrolyte solution or cathode including a phosphate-based compound which may exhibit stable and excellent lifetime characteristics at high temperature and high voltage regardless of the moisture content or the presence of a pressing process of the electrode.

Abstract: Provided are a lithium secondary battery including a cathode, an anode, a separator, and a gel polymer electrolyte, wherein the gel polymer electrolyte includes an acrylate-based polymer and a charge voltage of the battery is in a range of 4.3 V to 5.0 V, and a method of preparing the lithium secondary battery. A high-voltage lithium secondary battery of the present invention has excellent capacity characteristics at a high voltage of 4.3 V or more.

Abstract: Disclosed is a lithium secondary battery with improved rate characteristics. More particularly, disclosed is a lithium secondary battery including a cathode, an anode, a separator disposed between the cathode and the anode, and an electrolyte, wherein the electrolyte includes a mixed solvent of a cyclic carbonate-based material and a propionate-based material, the cathode includes a lithium manganese composite oxide represented by Formula 1 below as a cathode active material, and the anode includes a lithium metal oxide represented by Formula 2 below as an anode active material: LixMyMn2-yO4-zAz??(1) wherein 0.9?x?1.2, 0<y<2, and 0?z<0.2; M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti, and Bi; and A is at least one monovalent or divalent anion. LiaM?bO4-cAc??(2) wherein M? is at least one element selected from the group consisting of Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al, and Zr; 0.1?a?4 and 0.

Abstract: The present invention relates to a carbon-based fiber sheet and a lithium-sulfur battery including the same. The carbon-based fiber sheet for the lithium-sulfur battery according to the present invention is doped with a high concentration of nitrogen and thus plays a role of preventing diffusion by adsorbing lithium polysulfide eluted from a positive electrode during charging and discharging, thereby suppressing a shuttle reaction and thus improving capacity and lifecycle properties of the lithium-sulfur battery.

Abstract: Disclosed is a lithium secondary battery including a positive electrode, a negative electrode, a separator and a nonaqueous electrolyte, wherein the positive electrode includes LiaNixMnyCozO2 (a+x+y+z=2, 0.9?a?1.1, 0?x, 0?y, 0?z) as a positive electrode active material, and wherein the nonaqueous electrolyte includes (i) fluorinated cyclic carbonate expressed by Chemical Formula 1 below, (ii) propionate-based ester expressed by Chemical Formula 2 below, and (iii) non-halogenated carbonate, so that a mixture weight ratio (i:ii) thereof is 20:80 to 50:50: wherein, in Chemical Formula 1, R1, R2, R3 and R4 are independently any one of F, H and methyl group, and at least one thereof is F, wherein, in Chemical Formula 2, R5 is alkyl group having 1 to 5 carbons.

Abstract: The present invention relates to a multi-layer structured lithium metal electrode and a method for manufacturing the same and, specifically, to a multi-layer structured lithium metal electrode comprising: a buffer layer of lithium nitride (Li3N) formed on a lithium metal plate; and a protective layer of LiBON formed on the buffer layer, and to a method for manufacturing a multi-layer structured lithium metal electrode by continuously forming a lithium nitride buffer layer and a LiBON protective layer on a lithium metal plate through continuous reactive sputtering multi-layer structured lithium metal electrode multi-layer structured lithium metal electrode lithium metal plate multi-layer structured lithium metal electrode lithium metal plate. The multi-layer structured lithium metal electrode of the present invention can protect the reactivity of the lithium metal from moisture or an environment within a battery, and prevent the formation of dendrites, by forming the protective layer.

Abstract: The present invention relates to an electrolyte containing a polydopamine and a lithium-sulfur battery including the same and, more particularly, to a technique in which polydopamine contained in an electrolyte adsorbs a lithium polysulfide eluted from a positive electrode of a lithium-sulfur battery. When using an electrolyte, according to the present invention, to which polydopamine particles are added, the polydopamine particles dispersed in the electrolyte act to adsorb lithium polysulfide eluted from a positive electrode during the charging and discharging, and thus can suppress the diffusion thereof, i.e., suppress a shuttle reaction, thereby improving the capacity and lifetime characteristics of the lithium-sulfur battery.

Abstract: Disclosed is a secondary battery including an electrode assembly, which includes a cathode, an anode and a separator interposed therebetween, and an electrolyte, wherein the anode includes lithium titanium oxide (LTO) as an anode active material and the electrolyte contains a phosphate-based compound as an additive.

Abstract: The present invention relates to an electrolyte solution for a lithium-sulfur battery and a lithium-sulfur battery including the same. The electrolyte solution for a lithium-sulfur battery according to the present invention exhibits excellent stability, and may improve a swelling phenomenon by suppressing gas generation during lithium-sulfur battery operation.

Abstract: The present invention may improve the lifetime characteristics of a lithium secondary battery, and particularly, may provide a non-aqueous electrolyte solution or cathode including a phosphate-based compound which may exhibit stable and excellent lifetime characteristics at high temperature and high voltage regardless of the moisture content or the presence of a pressing process of the electrode.

Abstract: Disclosed are an anode for secondary batteries and a secondary battery including the same. The anode includes an anode mixture including an anode active material, coated on a current collector, wherein the anode active material includes lithium titanium oxide (LTO) particles provided on surfaces thereof with a cross-linked polymer coating layer, wherein the LTO particles with the cross-linked polymer coating layer formed thereon retain a porous structure formed therebetween, and a cross-linked polymer of the coating layer is a phosphate-based compound.

Abstract: The present invention relates to a liquid electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same. The liquid electrolyte for a lithium-sulfur battery according to the present invention exhibits excellent stability, and may improve a swelling phenomenon by suppressing gas generation during lithium-sulfur battery operation.

Abstract: Provided are a non-aqueous electrolyte including a non-aqueous organic solvent, a lithium salt, and a borate-based compound, and a lithium secondary battery using the same. According to the present invention, a lithium secondary battery having improved cycle characteristics and high-temperature storage stability may be prepared by including a non-aqueous electrolyte which includes at least one borate-based compound as an additive.

Abstract: The present invention relates to an electrolyte solution for a lithium-sulfur battery and a lithium-sulfur battery including the same. The electrolyte solution for a lithium-sulfur battery according to the present invention exhibits excellent stability, and may improve a swelling phenomenon by suppressing gas generation during lithium-sulfur battery operation.

Abstract: Disclosed is a secondary battery including an electrode assembly, which includes a cathode, an anode and a separator interposed therebetween, and an electrolyte, wherein the anode includes lithium titanium oxide (LTO) as an anode active material and the electrolyte contains a phosphate-based compound as an additive.

Abstract: The present invention relates to an electrode assembly for a lithium secondary battery, a lithium secondary battery and a battery module comprising the same, and in particular, to an electrode assembly for a lithium secondary battery capable of, by changing a form of a lithium negative electrode current collector and thereby minimizing an interface of the negative electrode current collector exposed to a electrolyte, fundamentally blocking a corrosion reaction focusing on the negative electrode current collector caused by the liquid electrolyte in the art, and a lithium secondary battery and a battery module including the same.