Method for preparing aluminum-doped zinc oxide coated lithium-ion battery positive-pole material

A lithium-ion battery, aluminum-doped zinc oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient cycle performance, unstable structure, low conductivity, etc. simple effect

Inactive Publication Date: 2013-06-12
TIANJIN POLYTECHNIC UNIV
View PDF0 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above cathode materials have their own disadvantages: LiCoO 2 The structure is unstable at high potential, and the actual capacity is only half of the theoretical capacity; LiNiO 2 The crystal stability is poor and the cycle performance is seriously insufficient; LiMn 2 o 4 Medium Mn 2+ It is easy to dissolve in the electrolyte and cause rapid capacity decay; LiFePO 4 The poor conductivity of Li makes it difficult to deintercalate lithium ions, while LiNi x co y mn 1-x-y o 2 There are problems of low initial charge and discharge efficiency, structural stability and cycle stability to be improved
Therefore, all electrode materials ge

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing aluminum-doped zinc oxide coated lithium-ion battery positive-pole material
  • Method for preparing aluminum-doped zinc oxide coated lithium-ion battery positive-pole material
  • Method for preparing aluminum-doped zinc oxide coated lithium-ion battery positive-pole material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve zinc nitrate and aluminum nitrate in absolute ethanol, place in 50°C water and stir to completely dissolve zinc nitrate and aluminum nitrate, and Zn 2+ and Al 3+ The total concentration of Al is 0.6mol / L, Al 3+ / (Al 3+ +Zn 2+ ) The molar ratio is 1.5%. Add stabilizer monoethanolamine (MEA) then, MEA and (Al 3+ +Zn 2+ ) in a molar ratio of 1:1. The solution was stirred at 50° C. for 2 h to yield a colorless and transparent sol. LiCo 0.5 Ni 0.5 o 2 The positive electrode material is added into the sol, and the stirring is continued until the solvent in the sol is completely evaporated. The product was completely dried in an oven at 120°C to obtain a black surface coated with hydrolyzed LiCo0.5 Ni 0.5 o 2 The material is then placed in a high-temperature furnace, raised to 500°C at a rate of 3°C / min, kept for 2 hours, and cooled to room temperature naturally to obtain a lithium-ion battery LiCo with aluminum-doped zinc oxide on the surface. 0.5 Ni 0....

Embodiment 2

[0033] Dissolve zinc acetate and aluminum nitrate in absolute ethanol, place in water at 60°C and stir to completely dissolve zinc acetate and aluminum nitrate, and Zn 2+ and Al 3+ The total concentration of Al is 0.75mol / L, Al 3+ / (Al 3+ +Zn 2+ ) The molar ratio is 1%. Add stabilizer monoethanolamine (MEA) then, MEA and (Al 3+ +Zn 2+ ) in a molar ratio of 1:1. . The solution was stirred at 60 °C for 2 h to produce a colorless and transparent sol. LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The positive electrode material is added into the sol, and the stirring is continued until the solvent in the sol is completely evaporated. The product was completely dried in an oven at 100°C to obtain a black LiNi surface coated with hydrolyzed products. 1 / 3 co 1 / 3 mn 1 / 3 o 2 Cathode material. Put the lithium-ion battery positive electrode material coated with hydrolyzate on the surface in a high-temperature furnace, raise the temperature to 500°C at a rate of 3°C / min, keep it for 2 hours...

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

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing an aluminum-doped zinc oxide coated lithium-ion battery positive-pole material and belongs to the technical field of lithium-ion battery pole materials and preparation thereof. The method has the following steps of: preparing aluminum-doped zinc sol by adopting a sol-gel method, adding a positive pole material into the aluminum-doped zinc sol, stirring until a solvent in the sol is completely evaporated so as to obtain a black positive pole material of which the surface is coated with a hydrolysis product, and then carrying out high-temperature calcination treatment in an air atmosphere, thereby obtaining the lithium-ion battery positive-pole material of which the surface is coated with aluminum-doped zinc oxide. The preparation method disclosed by the invention is simple in process, convenient to operate, low in cost and little in pollution; and the prepared positive-pole material of which the surface is coated with aluminum-doped zinc oxide has good cycle performance, power multiplying performance, overcharge resistance and thermal stability, and meanwhile, the initial discharge capacity of the positive-pole material is not lowered.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode materials and preparation thereof, and in particular provides an aluminum-doped zinc oxide-coated lithium-ion battery positive electrode material and a preparation method thereof. Background technique [0002] Lithium-ion battery is the leader of new high-energy green battery. It is a new type of secondary battery developed on the basis of lithium battery. Lithium-ion batteries have the advantages of high energy density, high power density, high working voltage, long cycle life, good safety performance, no memory effect, and no pollution. It is currently the most advanced green secondary battery. Since its inception, it has been widely used in portable electronic devices such as mobile communication tools, cameras, and notebook computers, and is gradually applied to vehicles such as electric bicycles and electric vehicles. A lithium-ion battery generally includes a positive ...

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

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/62H01M4/48
CPCY02E60/10
Inventor 梁小平刘建李冬梅左蕊刘凯毛新钰李建新王虹
Owner TIANJIN POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap