A positive electrode for a rechargeable lithium battery includes a positive active material for a rechargeable lithium battery that includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least a portion of the primary particles has a radial arrangement structure, and a second positive active material having a monolith structure, wherein the first and second positive active materials each include a nickel-based positive active material, and an X-ray diffraction (XRD) peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3. Further embodiments provide a method of manufacturing the positive electrode for rechargeable lithium battery, and a rechargeable lithium battery including the same.

The present disclosure relates to compositions comprising at least one carbonaceous particulate material comprised of synthetic graphite particles having a BET specific surface area (SSA) of equal to or less than 4 m.sup.2/g, and further comprising between about 5 and about 75% (w/w) of at least one carbonaceous particulate material comprised of natural graphite particles coated with non-graphitic carbon and having a BET SSA of equal to or less than 8 m.sup.2/g. Such compositions are particularly useful as active material for negative electrodes in, e.g., lithium-ion batteries and the like in view of their overall favorable electrochemical properties, particularly for automotive and energy storage applications. The present disclosure also relates to the use of said non-graphitic carbon-coated natural graphite particles for preparing compositions that are suitable for being used as an active material in a negative electrode of, e.g., a lithium ion battery. The non-graphitic carbon-coated natural graphite particles described herein are also useful as a carbonaceous additive to increase, e.g., the energy density and charge rate performance of a lithium-ion battery while maintaining the power density of the cell compared to a cell with an anode absent the carbonaceous additive.

The present invention belongs to the field of battery materials, and relates to a process for preparing a particulate lithium manganese nickel spinel compound, and materials produced by the process. The process of the invention uses Mn-containing precursors, Ni-containing precursors, Li-containing precursors and optionally M-containing precursor which form substantially no NOx ases during calcination. The particulate lithium manganese nickel spinel compound product of the process may find use in a lithium ion battery.

Disclosed are novel precursor particles for preparing a cathode active material including transition metal precursor particles containing one or more transition metals, and one or more of an alkali metal and an alkaline earth metal, wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particles, and a novel precursor powder including the novel precursor particles.

The present disclosure relates to the technical field of lithium ion battery, and discloses a Lithium-Manganese-rich material and a preparation method and a use thereof.

Process for making a manganese composite (oxy)hydroxide with a mean particle diameter D50 in the range from 2 to 16 μm comprising the step(s) of combining (a) an aqueous solution containing salts of nickel and of manganese, and, optionally, at least one of Al, Mg, or transition metals other than nickel and manganese wherein at least 50 mole-% of the metal is manganese, (b) with an aqueous solution of an alkali metal hydroxide and (c) an organic acid or its alkali or ammonium salt wherein said organic acid bears at least two functional groups per molecule and at least one of the functional groups is a carboxylate group.

A positive electrode active material that has high capacity and excellent charge and discharge cycle performance for a secondary battery is provided. The positive electrode active material includes a group of particles including a first group of particles and a second group of particles. The group of particles includes lithium, cobalt, nickel, aluminum, magnesium, oxygen, and fluorine. When the number of cobalt atoms included in the group of particles is taken as 100, the number of nickel atoms is greater than or equal to 0.05 and less than or equal to 2, the number of aluminum atoms is greater than or equal to 0.05 and less than or equal to 2, and the number of magnesium atoms is greater than or equal to 0.1 and less than or equal to 6. When particle size distribution in the group of particles is measured by a laser diffraction and scattering method, the first group of particles has a first peak and the second group of particles has a second peak; the first peak has a local maximum value at longer than or equal to 2 μm and shorter than or equal to 4 μm, and the second peak has a local maximum value at longer than or equal to 9 μm and shorter than or equal to 25 μm.

The positive electrode active material is capable of reducing positive electrode resistance, exhibiting better output characteristics, and having high mechanical strength when the positive electrode active material is used in a lithium ion secondary battery. Secondary particles have a d50 of 3.0 to 7.0 μm, a BET specific surface area of 2.0 to 5.0 m.sup.2/g, a tap density of 1.0 to 2.0 g/cm.sup.3, and an oil absorption amount of 30 to 60 ml/100 g. In each of a plurality of primary particles having a primary particle size of 0.1 to 1.0 μm, a coefficient of variation of the concentration of an additive element M is 1.5 or less. The volume of a linking section between the primary particles per primary particle, obtained from the total volume of the linking section and the number of primary particles constituting the secondary particles, is 5×10.sup.5 to 9×10.sup.7 nm.sup.3.

A spheronized carbonaceous negative electrode active material and a method of preparing a spheronized carbonaceous negative electrode active material, which has an average particle diameter (D.sub.50) of 8.5-10.5 μm, a minimum particle diameter (D.sub.min) of 2.3 μm or more, and a tap density of 1.00-1.20 g/cc.

A negative electrode active material including natural graphite. The negative electrode active material has a ratio of D.sub.90 to D.sub.10, which is D.sub.90/D.sub.10, of 2.0 to 2.2, a tap density of 1.11 g/cm.sup.3 to 1.19 g/cm.sup.3, and a BET specific surface area of 2.02 m.sup.2/g to 2.30 m.sup.2/g.