Abstract: A method for preparing a positive electrode active material precursor includes preparing a metal aqueous solution including a nickel raw material, a cobalt raw material, and a manganese raw material (step 1); adding the metal aqueous solution, an ammonium cation complex forming agent, and a basic aqueous solution into a reactor, co-precipitating the mixture at pH 11 to less than pH 12 to form nuclei of first positive electrode active material precursor particles and growing the nuclei (step 2); adjusting input amount of the basic aqueous solution to increase the pH in the reactor to a range of 0.8 to 1.5 compared to that of step 2; and adjusting input amount of the basic aqueous solution to change the pH in the reactor to pH 11 to less than pH 12 (step 4). A positive electrode active material precursor prepared by the above preparation method has an improved packing density.

Abstract: A positive electrode active material precursor having a uniform particle size distribution and represented by Formula 1, wherein a percentage of fine powder with an average particle diameter (D50) of 1 ?m or less is generated when the positive electrode active material precursor is rolled at 2.5 kgf/cm2 is less than 1%, and an aspect ratio is 0.93 or more, and a method of preparing the positive electrode active material precursor [NixCoyM1zM2w](OH)2 ??[Formula 1] in Formula 1, 0.5?x<1, 0<y?0.5, 0<z?0.5, and 0?w?0.1, M1 includes at least one selected from the group consisting of Mn and Al, and M2 includes at least one selected from the group consisting of Zr, B, W, Mo, Cr, Nb, Mg, Hf, Ta, La, Ti, Sr, Ba, Ce, F, P, S, and Y. A method of preparing the positive electrode active material precursor is also provided.

Abstract: A positive electrode active material for a secondary battery includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide has a layered crystal structure of space group R3m, includes the nickel (Ni) in an amount of 60 mol % or less based on a total amount of transition metals, includes the cobalt (Co) in an amount greater than an amount of the manganese (Mn), and is composed of single particles.

Abstract: Provided is a method for recovering and reusing an active material from a positive electrode scrap.

Abstract: The present invention relates to a container. More specifically, the present invention relates to a container with a ring carrier for hanging a ring, which is either provided at the lower part, upper part, or cap of the container. The ring carrier allows a user to easily hold the container and is conveniently inserted into the strips of a bag or a knapsack, so the container can be easily transported or stored. For this purpose, a container (A) with a ring carrier (12) according to the present invention comprises a carrier coupling unit (21) which is coupled with the ring carrier (12). A coupling unit (13) fixed to the carrier coupling unit (21) is formed at one side of the ring carrier (12) and a ring hole (14) is formed at the other side thereof.