The invention discloses a preparation method of a lithium titanate cathode material with high tap density. The preparation method comprises the following steps: weighing a lithium source and a titanate source according to the mole ratio of Li to Ti being (0.80-0.85): 1, and taking deionized water as a medium; carrying out uniform stirring and spray drying; then, carrying out high-temperature calcination, wet ball-milling, secondary spray drying, secondary high-temperature sintering, and screening to obtain the lithium titanate cathode material. The lithium titanate cathode material obtained according to the preparation method has the advantages that the tap density can be improved to 1.2 g/cm or above; lithium titanate particles obtained during the preparation are spherical, solid in structure and high in dispersity.

Preparation method of lithium titanate cathode material with high tap density

This application describes a process for the preparation of carbon-coated particles, where the particles comprise an electrochemically active material. The process comprises the steps of emulsion polymerization, drying and thermally treating the polymer to obtain a nano-layer of carbon on the particles, where the carbon layer comprises fibers and nitrogen-containing polyaromatics have a graphene-like structure. The application also further relates to the particles produced by the method as well as to electrode materials, electrodes and electrochemical cells comprising the particles.

Carbon-coated active particles and processes for their preparation

The invention discloses an aqueous binding agent for a lithium ion battery. The aqueous binding agent is prepared from 0.2-9wt% of long-chain polyether compound containing dual bonds, 7-11wt% of vinylmonomer, 0.001-1wt% of initiator and 0.02-2wt% of emulgator with the balance being water. High strength and high elasticity of the aqueous binding agent for the lithium ion battery prepared by the method can be maintained within a relatively wide temperature range, the aqueous binding agent is particularly and suitably used for binding an electrode, and the transmission capability of lithium ionsin the electrode is effectively improved.

Aqueous binding agent for lithium ion battery and preparation method of aqueous binding agent

A method for preparing an electrode active material of a lithium-ion battery. The method comprises the following steps: providing a lithium source and titanium oxide, and mixing the lithium source and titanium oxide into a mixture, performing first grinding on the mixture, so as to obtain multiple precursor particles; performing pre-sintering on the precursor particles at a temperature of 500 to 600 degrees centigrade, so as to obtain multiple first intermediate particles; performing second grinding on the multiple first intermediate particles, and performing second sintering at a temperature of 800 to 1000 degrees centigrade, so as to obtain multiple second intermediate particles; and performing third grinding on the multiple second intermediate particles, and performing third sintering at a temperature of 500 to 700 degrees centigrade, so as to obtain spinel lithium titanate particles.

Method for preparing electrode active material of lithium-ion battery

The invention discloses a preparation method of a lithium manganese titanate positive electrode material and belongs to the technical field of preparation of a lithium battery material. The method comprises the following steps: (1) adding a lithium source, a titanium source and a manganese source into a monomer copolymerization reaction system for initiating a copolymerization reaction, and drying to obtain a precursor; and (2) sintering the precursor for 3h-24h under the air atmosphere and at the temperature of 500-1000 DEG C to obtain the lithium manganese titanate positive electrode material. Compared with an existing sol-gel method, the method does not need to use raw materials with high price and can overcome the defects of long reaction period of a solid-phase method and the like; and the preparation method has the advantages of simple process, simplicity and convenience for operation and environment friendliness, and can meet the circulating stability of the materials.

Preparation method of lithium manganese titanate positive electrode material

The invention relates to a preparation method of a lithium ion battery electrode active material. The method comprises the steps that: lithium source and titanium oxide are provided, and are mixed into a mixture; the mixture is subjected to first grinding, such that a plurality of precursor particles are obtained; the precursor particles are pre-sintered under a temperature of 500-600 DEG C, such that a plurality of first intermediate particles are obtained; the plurality of first intermediate particles are subjected to second grinding, and are subjected to second sintering under a temperature of 800-1000 DEG C, such that a plurality of second intermediate particles are obtained; and the plurality of second intermediate particles are subjected to third grinding, and are subjected to third sintering under a temperature of 500-700 DEG C, such that spinel lithium titanate particles are obtained.

Preparation method of lithium ion battery electrode active material

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Preparation method of lithium ion battery electrode active material

Method for preparing electrode active material of lithium-ion battery