Preparation method of alumina coated lithium titanate

A technology of lithium titanate and alumina, which is applied in the direction of electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of lithium titanate flatulence and other problems, achieve the effects of reducing water absorption, improving flatulence problems, and reducing decomposition
CN104852035AActive Publication Date: 2015-08-19HUNAN RESHINE NEW MATERIAL
5 Cites 23 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN RESHINE NEW MATERIAL
Publication Date
2015-08-19

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a preparation method of alumina coated lithium titanate. The method comprises the following steps of 1) mixing aluminum salt, lithium titanate, a first alcohol solvent and a dispersing agent to react and performing vacuum drying to obtain an aluminum salt coated lithium titanate precursor, wherein a mass ratio of lithium titanate to the first alcohol solvent is (1:0.5)-(1:4); and 2) sintering and cooling the aluminum salt coated lithium titanate precursor to obtain alumina coated lithium titanate. The aluminum salt is sufficiently and uniformly mixed with lithium titanate under the action of the first alcohol solvent and the dispersing agent, and an alumina film formed on the surface of lithium titanate is moderate in thickness, small in particle size and uniform, so that prepared alumina coated lithium titanate reduces the water absorption of lithium titanate, reduces a decomposition effect of a Ti-O bond on an electrolyte, does not react with the electrolyte under overpotential, and improves inflation of a lithium titanate battery.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of lithium battery materials, in particular to a preparation method of alumina-coated lithium titanate. Background technique

[0002] Lithium-ion batteries, also known as rocking chair batteries, store and release energy through the deintercalation of lithium ions between the positive and negative electrode materials. Lithium-ion batteries have the advantages of light weight, large capacity, no memory effect, and environmental protection. Many digital devices now use lithium-ion batteries as power sources. In lithium-ion batteries, the positive electrode material, negative electrode material and electrolyte are the main aspects that affect the performance of lithium-ion batteries. At present, the research and development of lithium-ion battery negative electrodes mainly focus on carbon materials and metal oxides with special structures. Because the graphite negative electrode has good conductivity and high crystalli...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More