A positive electrode active material for non-aqueous electrolyte secondary batteries according to one example of an embodiment comprises a lithium-containing composite oxide that is secondary particles in which primary particles are aggregated. The lithium-containing composite oxide exhibits not fewer than 300 voids per 76.46 m.sup.2, an average void perimeter length of not more than 600 nm, and a porosity of not more than 0.15%, as determined by observation of a secondary particle cross-section.

A positive electrode active material for non-aqueous electrolyte secondary batteries according to one example of an embodiment comprises a lithium-containing composite oxide that is secondary particles in which primary particles are aggregated. The lithium-containing composite oxide exhibits not fewer than 300 voids per 76.46 m.sup.2, an average void perimeter length of not more than 600 nm, and a porosity of not more than 0.15%, as determined by observation of a secondary particle cross-section.

The present disclosure relates to a positive electrode active material and a recycling method thereof. In the positive electrode active material and a recycling method thereof, the positive electrode active material is at least one type selected from a lithium nickel oxide (LNO)-based positive electrode active material, a nickel-cobalt-manganese (NCM)-based positive electrode active material, a nickel-cobalt-aluminum (NCA)-based positive electrode active material and a nickel-cobalt-manganese-aluminum (NCMA)-based positive electrode active material, in which single particles are included, a content of F is about 5,700 mg/kg to 6,500 mg/kg, an a-axis lattice parameter measured by an XRD analysis is about 2.8753 to 2.8772 , a c-axis lattice parameter is about 14.243 to 14.255 , a cell volume is about 101.968 .sup.3 to 102.168 .sup.3 and a crystallite size is greater than about 130 nm and equal to or less than 136 nm.

The present disclosure relates to a positive electrode active material and a recycling method thereof. In the positive electrode active material and a recycling method thereof, the positive electrode active material is at least one type selected from a lithium nickel oxide (LNO)-based positive electrode active material, a nickel-cobalt-manganese (NCM)-based positive electrode active material, a nickel-cobalt-aluminum (NCA)-based positive electrode active material and a nickel-cobalt-manganese-aluminum (NCMA)-based positive electrode active material, in which single particles are included, a content of F is about 5,700 mg/kg to 6,500 mg/kg, an a-axis lattice parameter measured by an XRD analysis is about 2.8753 to 2.8772 , a c-axis lattice parameter is about 14.243 to 14.255 , a cell volume is about 101.968 .sup.3 to 102.168 .sup.3 and a crystallite size is greater than about 130 nm and equal to or less than 136 nm.

A positive electrode active material precursor includes a first positive electrode active material precursor having a composition represented by Formula 1 described herein and including a composite transition metal in the form of a single particle, and one or more of a second positive electrode active material precursor having a composition represented by Formula 2 described herein or a third positive electrode active material precursor having a composition represented by Formula 3 described herein. The positive electrode active material precursor is capable of implementing a positive electrode active material in the form of a single particle even when heat-treated at a low temperature. Also provided is, a method for preparing a positive electrode active material using the positive electrode active material precursor, and a positive electrode active material prepared by the method.

A positive electrode active material precursor includes a first positive electrode active material precursor having a composition represented by Formula 1 described herein and including a composite transition metal in the form of a single particle, and one or more of a second positive electrode active material precursor having a composition represented by Formula 2 described herein or a third positive electrode active material precursor having a composition represented by Formula 3 described herein. The positive electrode active material precursor is capable of implementing a positive electrode active material in the form of a single particle even when heat-treated at a low temperature. Also provided is, a method for preparing a positive electrode active material using the positive electrode active material precursor, and a positive electrode active material prepared by the method.

A slurry, an electrode, and a method for manufacturing an electrode for Lithium-ion batteries, wherein the electrode is a compound consisting in a water-based binder system and an electrochemically activatable compound with Li-metal oxides comprising Ni, wherein the Ni amount in Metal (LiMeO2) is at least 80% wt, and wherein the pH value in the slurry is adjusted to be between 9 to 10.5.

A slurry, an electrode, and a method for manufacturing an electrode for Lithium-ion batteries, wherein the electrode is a compound consisting in a water-based binder system and an electrochemically activatable compound with Li-metal oxides comprising Ni, wherein the Ni amount in Metal (LiMeO2) is at least 80% wt, and wherein the pH value in the slurry is adjusted to be between 9 to 10.5.

A lithium-sodium composite manganese-based material and a preparation method thereof, a positive electrode plate, a secondary battery, and an electric apparatus. The lithium-sodium composite manganese-based material includes Li.sub.tNa.sub.y[Li.sub.xNi.sub.aCo.sub.bMn.sub.cMa]A.sub.pO.sub.g, where 0<y0.2, 0.68t+y1, x+a+b+c+d=1, x>0, a0.17, 0b<0.1, c0.4, 0d<0.04, 0p0.1, 0<q2; M includes one or more of V, Nb, Ta, Cr, Mo, B, Al, Ti, Zr, Mg, Ce, Fe, W, or Sn, and A includes one or more of F, S, N, or Cl.

A lithium-sodium composite manganese-based material and a preparation method thereof, a positive electrode plate, a secondary battery, and an electric apparatus. The lithium-sodium composite manganese-based material includes Li.sub.tNa.sub.y[Li.sub.xNi.sub.aCo.sub.bMn.sub.cMa]A.sub.pO.sub.g, where 0<y0.2, 0.68t+y1, x+a+b+c+d=1, x>0, a0.17, 0b<0.1, c0.4, 0d<0.04, 0p0.1, 0<q2; M includes one or more of V, Nb, Ta, Cr, Mo, B, Al, Ti, Zr, Mg, Ce, Fe, W, or Sn, and A includes one or more of F, S, N, or Cl.