A process for preparing a cathode material comprising a compound of the form Li.sub.aMn.sub.1-x-zFe.sub.xNi.sub.zO.sub.2-dCl.sub.d is provided. In addition, a Li.sub.aMn.sub.1-x-zFe.sub.xNi.sub.zO.sub.2-dCl.sub.d cathode material for electrochemical systems is provided. Furthermore, a lithium or lithium-ion rechargeable electrochemical cell is provided, incorporating the Li.sub.aMn.sub.1-x-zFe.sub.xNi.sub.zO.sub.2-dCl.sub.d cathode material in a positive electrode.

High surface area, high entropy oxides comprising multiple metal cations in a single-phase fluorite lattice material enables intrinsic catalytic activity without platinum group metals, tunable oxygen storage capacity, and thermal stability. These properties can be obtained through a facile sol-gel synthesis to provide a low-temperature route for production of phase-pure multi-cationic oxides. The resulting materials achieved significantly higher surface area and catalytic performance, taking advantage of all the properties endowed by the various cations in the composition.

A binder-free, self-supporting electrode including an electrochemically active material in the absence of a binder and a current collector is claimed. The electrochemically active material is a self-supporting transition metal oxide. A method of regenerating the electrode to restore capacity of the electrode is also claimed.

The present disclosure provides a positive electrode active material having a spinel-type crystal structure that can reduce an increase in resistance and a decrease in capacity retention rate due to repeated charging and discharging of a non-aqueous electrolyte secondary battery. The positive electrode active material disclosed herein is configured of a lithium manganese composite oxide having a spinel-type crystal structure, wherein the lithium manganese composite oxide includes secondary particles in which a plurality of primary particles are aggregated, an average particle diameter of the secondary particles based on a SEM image is 10 μm or more and 20 μm or less, an average particle diameter of the primary particles based on a SEM image is 4 μm or more and 8 μm or less, and nickel atoms are provided in the surface layer portion of the secondary particles.

A class of compositions in the Li—Mn—O—F chemical space for Li-ion cathode materials. The compositions are cobalt-free, high-capacity Li-ion battery cathode materials synthesized with cation-disordered rocksalt (DRX) oxide or oxyfluorides, with the general formula Li.sub.xMn.sub.2-xO.sub.2-yF.sub.y (1.1≤x≤1.3333; 0≤y≤0.6667). The compositions are characterized by: (i) high capacities (e.g., >240 mAh/g); (ii) high energy densities (e.g., >750 Wh/kg between 1.5-4.8V); (iii) favorable cyclability; and (iv) low cost.

The present disclosure relates to methodologies, systems and apparatus for generating lithium ion battery materials. Starting materials are combined to form a homogeneous precursor solution including lithium, and a droplet maker is used to generate droplets of the precursor solution having controlled size. These droplets are introduced into a microwave generated plasma, where micron or sub-micron scale lithium-containing particles are formed. These lithium-containing particles are collected and formed into a slurry to form lithium ion battery materials.

A positive electrode active material for a secondary battery includes a lithium metal composite oxide having a crystal structure based on a rock salt structure belonging to a space group Fm-3m, wherein the lithium metal composite oxide includes Ti and a metal element M.sup.1 other than Li and Ti. The metal element M.sup.1 preferably further includes at least one selected from the group consisting of Fe, Ge, Si, and Ga.

The present invention relates to a positive electrode active material and a lithium secondary battery including the same, and more particularly, to a positive electrode active material, which includes an overlithiated lithium manganese-based oxide, which is a solid solution with a phase belonging to a C2/m space group and a phase belonging to an R3-m space group and in which stability degradation caused by excessive amounts of lithium and manganese in the lithium manganese-based oxide is mitigated and/or prevented because there are regions with different proportions of the phase belonging to the C2/m space group and the phase belonging to the R3-m space group in the lithium manganese-based oxide, and a lithium secondary battery including the same.

Stabilized lithium- and manganese rich manganese-nickel-oxide electrode materials for Li-ion batteries with structurally-integrated layered, lithiated spinel- and rock salt components are described, as are methods to synthesize them. In these methods, selected annealing temperatures and times are used to control the amount of a stabilizing lithiated spinel component, as well as the extent of disorder in the composite electrode structure to optimize electrochemical performance. The stabilized lithium- and manganese rich manganese-nickel-oxide electrode materials can be structurally-integrated with other lithium-metal-oxide or lithium-metal-polyanionic components, as well.

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.