C01P2002/20

Production of graphene-structured products from coal using thermal molten salt process

The invention provides a method for the production of graphene-structured products. The method generally comprises contacting at a conversion temperature ranging from about 850° C. to about 1100° C. in an inert atmosphere coal with a molten salt to produce a graphene-structured product. In an alternate embodiment, the method comprises contacting at a conversion temperature ranging from about 850° C. to about 1100° C. in an inert atmosphere coal with a molten salt to produce a graphene-structured product; and, separating a rare earth element from the graphene-structured product.

2-DIMENSIONAL MICROPOROUS GRAPHENE AND METHOD FOR PREPARING THE SAME
20220402762 · 2022-12-22 ·

Provided are a 2-dimensional microporous graphene and a method for preparing the same. The 2-dimensional microporous graphene has an average pore size of about 0.1 nm to about 2 nm, interpore spacing of about 0.3 nm to about 10 nm, and a standard deviation of the interpore spacing of less than or equal to about 5 nm.

Methods of Synthesizing Single-Crystal LiNixMnyCo1-x-yO2 and Applications of these Materials

This disclosure provides systems, methods, and apparatus related to lithium-ion batteries. In one aspect, a method includes synthesizing an intermediate selected from a group of a nickel-manganese-cobalt nitrate, a nickel-manganese-cobalt acetate, a nickel-manganese-cobalt sulfate, a nickel-manganese-cobalt chloride, and a nickel-manganese-cobalt phosphate. The intermediate is mixed with a lithium salt selected from a group of LiOH, LiCl, LiNO.sub.3, LiSO.sub.4, LiF, LiBr, Li.sub.3PO.sub.4, Li.sub.2CO.sub.3, and combinations thereof to form a mixture. The mixture is annealed at a sequence of temperatures and times to form a plurality of single crystals of a lithium nickel-manganese-cobalt oxide, with no cooling of the mixture between operations of the sequence of temperatures and times.

Method of manufacturing MoS.SUB.2 .having 1T crystal structure

Provided is a method of manufacturing MoS.sub.2 having a 1T crystal structure. The method includes performing phase transition from a 2H crystal structure of MoS.sub.2 to the 1T crystal structure by reacting MoS.sub.2 having the 2H crystal structure with CO gas. The phase transition includes annealing the MoS.sub.2 having the 2H crystal structure in an atmosphere including CO gas.

COBALT-FREE CATHODE MATERIAL FOR LITHIUM ION BATTERY, METHOD FOR PREPARING COBALT-FREE CATHODE MATERIAL AND LITHIUM ION BATTERY
20220393166 · 2022-12-08 ·

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.

Lithium metal complex oxide and manufacturing method of the same

The present invention relates to a lithium metal complex oxide and a preparation method thereof, and more particularly, to a lithium metal complex oxide mixed with a metal compound for a lithium reaction, stirred and heat-treated to allow residual lithium and a metal compound for reducing lithium (or a metal compound for lithium reduction) to react with each other on a surface to form a product, which is included in the lithium metal complex oxide, in which the content of Ni.sup.3+ is higher than the content of Ni.sup.2+ and a ratio of Ni.sup.3+/Ni.sup.2+ is 1.5 or greater so that life characteristics and capacity characteristics are improved, while residual lithium is reduced, and a preparation method thereof.

POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY

A positive electrode active material that can achieve high thermal stability at low cost is provided.

Provided is a positive electrode active material for a lithium ion secondary battery, the positive electrode active material containing a lithium-nickel-manganese composite oxide, in which metal elements constituting the lithium-nickel-manganese composite oxide include lithium (Li), nickel (Ni), manganese (Mn), cobalt (Co), titanium (Ti), niobium (Nb), and optionally zirconium (Zr), an amount of substance ratio of the elements is represented as Li:Ni:Mn:Co:Zr:Ti:Nb=a:b:c:d:e:f:g (provided that, 0.97≤a≤1.10, 0.80≤b≤0.88, 0.04≤c≤0.12, 0.04≤d≤0.10, 0≤e≤0.004, 0.003<f≤0.030, 0.001<g≤0.006, and b+c+d+e+f+g=1), and in the amount of substance ratio, (f+g)≤0.030 and f>g are satisfied.

Synthesis of Janus nanomaterials
11572282 · 2023-02-07 · ·

Synthesizing Janus nanoparticles including forming a lamellar phase having water layers, organic layers, and a surfactant, and reacting chemical precursors in the lamellar phase to form the Janus nanoparticles at interfaces of the water layers with the organic layers.

PROCESS FOR PREPARING LITHIUM TRANSITION METAL OXIDES
20230030652 · 2023-02-02 ·

A process for producing a lithium transition metal oxide is provided. The process comprises pre-calcination of a transition metal precursor in the absence of a lithium source followed by a high-temperature calcination of the pre-calcined intermediate compound in the presence of a lithium source.

Lithium, nickel, manganese mixed oxide compound and electrode comprising the same

A compound of the general formula: (i) wherein x has a value greater than 0.06 and equal to or less than 0.4. The compound is also formulated into a positive electrode for use in an electrochemical cell.