The present disclosure provides a cobalt-free cathode material of a lithium ion battery, a method for preparing the cobalt-free cathode material, and the lithium ion battery. A general formula of the cobalt-free cathode material is Li.sub.xNi.sub.aMn.sub.bR.sub.cO.sub.2, wherein, 1≤x≤1.15, 0.5≤a≤0.95, 0.02≤b≤0.48, 0<c≤0.05, and R is aluminum or tungsten. Therefore, as the cobalt-free cathode material is free of metal cobalt, the cost of the cathode material can be lowered effectively. Aluminum or tungsten in the cobalt-free cathode material can stabilize a crystal structure of the cathode material better, such that the lithium ion battery has excellent rate capability and cycle performance, and furthermore, good cycling stability of the lithium ion battery can be still maintained under a high-temperature and high-pressure testing condition.

Dy.sub.2O.sub.3 particles of a nanoparticle scale have beneficial properties for ceramic and electronic uses. Disclosed herein are moderately dispersed Dy.sub.2O.sub.3 particles having regular morphology and lateral size ranging from about 10 nm to 1 μm. The Dy.sub.2O.sub.3 particles may exhibit a narrow particle size distribution such that the difference between D.sub.10 and D.sub.90 is about 0.1 μm to 1 μm. Further disclosed are processes of producing these moderately dispersed Dy.sub.2O.sub.3 particles. These processes do not include grinding to obtain the particles. Also disclosed herein are uses for these Dy.sub.2O.sub.3μ particles.

The present invention comprises: an overlithiated layered oxide represented by chemical formula 1 below; and an ion-conductive coating layer on the overlithiated layered oxide represented by chemical formula 1: [chemical formula 1] .sub.rLi.sub.2MnO.sub.3.Math.(1-r)Li.sub.aNi.sub.xCo.sub.yMn.sub.zM1.sub.1−(x+y+z)O.sub.2 (in chemical formula 1, 0<r≤0.6, 0<a≤1, 0≤x≤1, 0≤y<1, 0≤z<1, and 0<x+y+z<1, and M1 is at least one selected from among Na, K, Mg, Al, Fe, Cr, Y, Sn, Ti, B, P, Zr, Ru, Nb, W, Ba, Sr, La, Ga, Mg, Gd, Sm, Ca, Ce, Fe, Al, Ta, Mo, Sc, V, Zn, Cu, In, S, B, Ge, Si, and Bi).

The polishing particles of the present disclosure has controlled particle size and particle size distribution of cerium oxide particles comprised in the polishing particles, and thereby can suppress the formation of a scratch which may occur in a polishing process while having a characteristic of a high polishing rate.

A ceramic powder material containing a garnet-type compound containing Li, wherein the ceramic powder material has a pore volume of 0.4 mL/g or more and 1.0 mL/g or less.

Processes for producing supported zinc dimolybdate hydroxide/silica complexes include the steps of reacting a zinc compound (such as zinc oxide) and molybdenum trioxide in an aqueous system to form a reaction mixture, and contacting the reaction mixture with silica to form the supported zinc dimolybdate hydroxide/silica complex. The resulting supported zinc dimolybdate hydroxide/silica complexes contain silica and zinc dimolybdate hydroxide at an amount in a range from 3 to 20 wt. % zinc, and generally, at least 80 wt. % of the zinc dimolybdate hydroxide is present in the form Zn.sub.3Mo.sub.2O.sub.8(OH).sub.2. These supported zinc dimolybdate hydroxide/silica complexes are useful in polymer compositions, such as PVC-based and epoxy-based formulations.

The invention provides a positive electrode active material for a lithium ion battery, comprising a lithium transition metal-based oxide powder, the powder comprising single crystal monolithic particles comprising Ni and Co and having a general formula Li.sub.1+a ((Ni.sub.z (Ni.sub.1/2 Mn.sub.1/2).sub.y Co.sub.x).sub.1−kA.sub.k).sub.1-a 02, wherein A is a dopant, −0.02<a≤0.06, 0.10≤x≤0.35, 0≤z≤0.90, x+y+z=1 and k≤0.01, the particles having a cobalt concentration gradient wherein the particle surface has a higher Co content than the particle center.

Porous metal oxide microspheres are prepared via a process comprising forming a liquid dispersion of polymer nanoparticles and a metal oxide; forming liquid droplets of the dispersion; drying the droplets to provide polymer template microspheres comprising polymer nanospheres; and removing the polymer nanospheres from the template microspheres to provide the porous metal oxide microspheres. The porous microspheres exhibit saturated colors and are suitable as colorants for a variety of end-uses.

The present invention relates to a method for preparing a lithium manganese oxide-based material useful in applications such as for pseudocapacitors and lithium ions batteries. More specifically, by synthesizing manganese oxide nanoparticles and mixing them with lithium salts, and conducting stepwise heat treatment processes under optimized conditions, a lithium manganese oxide-based material with excellent specific capacitance, having a high surface area with a small size, can be prepared.

A solid electrolyte material is represented by the following compositional formula (1):
Li.sub.3-3δ-2aY.sub.1+δ-aM.sub.aCl.sub.6-x-yBr.sub.xI.sub.y where, M is at least one selected from the group consisting of Ta and Nb; and −1<δ<1, 0<a<1.2, 0<(3−3δ−2a), 0<(1+δ−a), 0≤x≤6, 0≤y≤6, and (x+y)≤6 are satisfied.