The present application provides a sodium-doped lithium-rich metal oxide material and a preparation method thereof, a positive electrode material, a positive electrode plate, a battery, and an electric apparatus. The sodium-doped lithium-rich metal oxide material includes a compound Li.sub.m-xNa.sub.xMO.sub.y. The sodium-doped lithium-rich metal oxide material of the present application facilitates reducing the resistance to lithium-ion extraction from the crystal lattice, thereby increasing the charging capacity of the battery.

The present application provides a sodium-doped lithium-rich metal oxide material and a preparation method thereof, a positive electrode material, a positive electrode plate, a battery, and an electric apparatus. The sodium-doped lithium-rich metal oxide material includes a compound Li.sub.m-xNa.sub.xMO.sub.y. The sodium-doped lithium-rich metal oxide material of the present application facilitates reducing the resistance to lithium-ion extraction from the crystal lattice, thereby increasing the charging capacity of the battery.

Simple, material-efficient microgranulation methods are disclosed for aggregating precursor particles into larger product particles with improved properties and, in some instances, novel structures. The product particles are useful in applications requiring uniform, smooth, spherical, or rounded particles such as for electrode materials in lithium batteries and other applications.

Simple, material-efficient microgranulation methods are disclosed for aggregating precursor particles into larger product particles with improved properties and, in some instances, novel structures. The product particles are useful in applications requiring uniform, smooth, spherical, or rounded particles such as for electrode materials in lithium batteries and other applications.

The present application discloses a positive electrode active material and its preparation method, a sodium ion battery and an apparatus containing the sodium ion battery. The positive electrode active material satisfies a chemical formula Na.sub.2+xCu.sub.hMn.sub.kM.sub.lO.sub.7-y, wherein M is one or more selected from Li, B, Mg, Al, K, Ca, Ti, V, Cr, Fe, Co, Ni, Zn, Ga, Sr, Y, Nb, Mo, Sn, Ba and W, 0x0.5, 0.1<h2, 1k3, 0l0.5, and 0y1, 2h+k+l3.5, and 0.57(2+x)/(h+k+l)0.9.

The present disclosure is related to a positive electrode active material for lithium secondary batteries, a method for preparing the positive electrode active material, and a lithium secondary battery including the positive electrode active material. The positive electrode active material for lithium secondary batteries includes an overlithiated layered oxide (OLO), and the overlithiated layered oxide includes primary particles having a size in a range of 300 nm to 10 m in an amount ranging from 50 to 100% by volume with respect to the total overlithiated layered oxide.

Provided in the present application are a positive electrode material, and a preparation method therefor and the use thereof. The chemical formula of the positive electrode material is xLi.sub.2MnO.sub.3:(1-x-y)LiNi.sub.aT.sub.M(1-a)O.sub.2.Math.yLiMn.sub.bA.sub.(1-b)PO.sub.4, wherein O<x<1, 0<y<1, 0a1, 0.5b1, and T.sub.M and A respectively and independently comprise a metal element. The positive electrode material can form continuous phase transformation, has a super-domain structure and a stable layered structure, and can stabilize lattice oxygen and reduce voltage drop, such that the cycling performance of a battery under a high voltage can be significantly improved.

Provided in the present application are a positive electrode material, and a preparation method therefor and the use thereof. The chemical formula of the positive electrode material is xLi.sub.2MnO.sub.3:(1-x-y)LiNi.sub.aT.sub.M(1-a)O.sub.2.Math.yLiMn.sub.bA.sub.(1-b)PO.sub.4, wherein O<x<1, 0<y<1, 0a1, 0.5b1, and T.sub.M and A respectively and independently comprise a metal element. The positive electrode material can form continuous phase transformation, has a super-domain structure and a stable layered structure, and can stabilize lattice oxygen and reduce voltage drop, such that the cycling performance of a battery under a high voltage can be significantly improved.

Improved methods for preparing lithium transition metal oxide particulate such as lithium nickel metal cobalt oxide (NMC) for use in lithium batteries and other applications are disclosed. The lithium transition metal oxide particulate is prepared from appropriate transition metal oxide and Li compound precursors mainly using dry, solid state processes including dry impact milling and heating. Further, novel precursor particulates and novel methods for preparing precursor particles for this and other applications are disclosed.

Improved methods for preparing lithium transition metal oxide particulate such as lithium nickel metal cobalt oxide (NMC) for use in lithium batteries and other applications are disclosed. The lithium transition metal oxide particulate is prepared from appropriate transition metal oxide and Li compound precursors mainly using dry, solid state processes including dry impact milling and heating. Further, novel precursor particulates and novel methods for preparing precursor particles for this and other applications are disclosed.