Abstract: The present invention provides a positive electrode active material powder for lithium-ion rechargeable batteries, wherein the positive electrode active material comprises Li, M?, S and O, wherein M? consists of: Ni in a content x between 60.0 mol % and 95.0 mol %, relative to M? Co in a content y between 0.0 mol % and 25.0 mol %, relative to M?, Mn in a content z between 0.0 mol % and 25.0 mol %, relative to M?, W in a content a of 0.05 mol % or more, relative to M? D in a content b between 0.0 mol % and 2.0 mol %, relative to M?, wherein D comprises at least one element of the group consisting of: Al, B, Ba, Ca, Cr, F, Fe, Mg, Mo, Nb, Si, Sr, Ti, Y, V, Zn and Zr, and, wherein x, y, z, a, and b are measured by ICP, wherein x+y+z+a+b is 100.0 mol %, wherein the positive electrode active material comprises soluble sulfur in a content of 0.30 mol % or more, relative to M?.

Abstract: A method and apparatus for providing an email service is provided. The method includes sorting received emails into preset categories, providing an interface for reading an email for each category, and determining whether to delete an email based on an automatic deletion option set for each category.