Abstract: The present disclosure relates to a positive electrode including a positive electrode active material, a positive electrode conductive material, and a positive electrode binder, wherein the positive electrode active material includes a lithium nickel-based oxide containing 70 mol % or less of nickel among all metals excluding lithium, wherein the lithium nickel-based oxide includes single particle-type particles, and the conductive material includes a linear conductive material and a dotted conductive material, and FCR defined by Equation (1) below satisfies 12 to 20: FCR=dc1×dc2×D50.a??[Equation (1)] wherein, dc1 is the true density (unit: g/cm3) of the linear conductive material above, dc2 is the true density (unit: g/cm3) of the dotted conductive material above, and D50.

Abstract: The present disclosure relates to a lithium secondary battery with improved safety during thermal runaway. The lithium secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and an electrolyte, and has a nominal voltage of 3.68 V or greater, and VT represented by Equation (1) below measured after manufacturing a test module by stacking four of the lithium secondary battery fully charged by being charged to 4.35 V is 4 Ah/sec or less: Equation (1): VT=Ctotal/t.

Abstract: The present disclosure relates to a lithium secondary battery with improved safety during thermal runaway. The lithium secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and an electrolyte, and has a nominal voltage of 3.68 V or greater, and VP represented by Equation (1) below is 4 mbar·Ah?1·sec?1 or less: Equation (1): VP=?P/(tmax×C).

Abstract: A resin composition for molding includes a polyarylene thioether resin having a constant ? of 0.8 or greater determined by the Mark-Houwink equation represented by Equation 1: ?=K×M?. In Equation 1, ? is the intrinsic viscosity, M is the molecular weight, and K and ? are constants.

Abstract: The present invention relates to a method for preparing dimethylether from methanol using a membrane reactor, more particularly to a method for preparing dimethylether from methanol using a membrane capable of carrying out a reaction and a separation at the same time while preparing dimethylether from methanol. Because water vapor generated by dehydration of methanol can be selectively removed from the catalytic reaction zone, decrease in catalytic activity can be prevented and thus life span of a catalyst can be extended. Further, reaction efficiency can be improved even at a temperature milder than the conventional one for dimethylether preparation, and also additional steps of separation and purification after completion of the reaction is no longer necessary.

Abstract: The present invention relates to a method for preparing dimethylether from methanol using a membrane reactor, more particularly to a method for preparing dimethylether from methanol using a membrane capable of carrying out a reaction and a separation at the same time while preparing dimethylether from methanol. Because water vapor generated by dehydration of methanol can be selectively removed from the catalytic reaction zone, decrease in catalytic activity can be prevented and thus life span of a catalyst can be extended. Further, reaction efficiency can be improved even at a temperature milder than the conventional one for dimethylether preparation, and also additional steps of separation and purification after completion of the reaction is no longer necessary.