Anode material for nickel-base lithium ion battery and preparation method of anode material

A lithium-ion battery and cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high energy consumption in industrialization, easy water absorption, and affecting the cycle stability of materials in the battery system, and achieve lithium-nickel mixed discharge Less, the effect of improving cycle stability

Active Publication Date: 2015-03-11
BTR NEW MATERIAL GRP CO LTD
View PDF4 Cites 105 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid phase method of mixing and doping raw materials consumes a lot of energy in industrialization, and doping alone cannot hinder the high oxidative Ni in the charging process. 4+ Side reaction with the electrolyte, the surface of the doped nickel-based multi-layered material still has soluble alkali, which is easy to absorb water, which affects the cycle stability of the material in the battery system

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
  • Anode material for nickel-base lithium ion battery and preparation method of anode material
  • Anode material for nickel-base lithium ion battery and preparation method of anode material
  • Anode material for nickel-base lithium ion battery and preparation method of anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) Ni prepared by hydroxide coprecipitation method 0.82 co 0.18 (OH) 2 As the precursor, lithium hydroxide monohydrate is used as the lithium source, the precursor and lithium hydroxide monohydrate are weighed according to the lithium metal ratio of 1.05, polyurethane balls are added, the ball material ratio is 2:1, and three-dimensional mixing is obtained at a frequency of 30 Hz for 4 hours. Homogenously mixed materials, at 0.6Nm 3 / hO 2 Air flow, heating up to 720°C at a heating rate of 3°C / min for 6 hours, then cooling naturally, crushing, pulverizing, and grading to obtain the matrix core of the nickel-based lithium-ion battery cathode material;

[0074] (2) Weigh the core of the nickel-based lithium-ion battery positive electrode material matrix and 5.0wt% Al 2 o 3 Solid powder (analytical purity ≥ 99.0%), add polyurethane balls, the ratio of balls to materials is 1:1, after three-dimensional mixing at 35Hz for 2 hours, at 0.6Nm 3 / hO 2 Air flow, 3°C / min he...

Embodiment 2

[0077] (1) Ni prepared by hydroxide coprecipitation method 0.85 co 0.15 (OH) 2 As a precursor, lithium hydroxide monohydrate and lithium acetate are used as lithium sources, wherein lithium hydroxide monohydrate accounts for 80% of the total lithium requirement, and lithium acetate accounts for 20% of the total lithium requirement. Weigh the precursor, lithium hydroxide monohydrate, and lithium acetate at a lithium-to-metal ratio of 1.05. By adding polyurethane balls, the ratio of balls to materials is 2:1, three-dimensional mixing at a frequency of 30Hz for 4 hours to obtain a homogeneous mixture, and then at 50Nm 3 / hO 2 Airflow, 720°C for 6 hours at a heating rate of 2°C / min, then naturally cooled, crushed, pulverized, and classified to obtain the core of the nickel-based lithium-ion battery cathode material matrix;

[0078] (2) Weigh the core of the nickel-based lithium-ion battery positive electrode material matrix and 1.0wt% Al 2 o 3 Solid powder (analytical purity...

Embodiment 3

[0080] (1) Ni prepared by hydroxide coprecipitation method 0.85 co 0.1 mn 0.03 Mg 0.02 (OH) 2 As the precursor, lithium acetate was used as the lithium source, and the precursor and lithium acetate were weighed according to the lithium metal ratio of 1.05. Polyurethane balls were added, and the ball-to-material ratio was 2:1. After three-dimensional mixing at a frequency of 10 Hz for 12 hours, a uniform mixture was obtained. At 1.2 N m 3 / hO 2 Airflow, 600°C heat preservation for 6 hours at a heating rate of 3°C / min, then natural cooling, crushing, crushing, and classification to obtain the core of the nickel-based lithium-ion battery cathode material matrix;

[0081] (2) Weigh the core of the nickel-based lithium-ion battery positive electrode material matrix and 0.5wt% Al 2 o 3 Required Al(OH) after conversion 3 Solid powder (analytical purity ≥ 99.0%), add polyurethane balls, the ratio of balls to materials is 1:1, after three-dimensional mixing at 35Hz 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

No PUM Login to view more

Abstract

The invention provides an anode material for a nickel-base lithium ion battery and a preparation method of the anode material. The anode material comprises an inner core, a doping layer and a cladding layer, wherein the chemical formula of the inner core is LiaNixCoyMzO2; the doping layer is another inner core containing M'; at least M' and oxygen elements are contained in the cladding layer; the anode material is of a core-shell structure, and comprises the inner core, the doping layer and the cladding layer from inside to outside. The anode material for the nickel-base lithium ion battery provided by the invention is little in lithium-nickel mixing, and the cycling stability of the material is obviously improved.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery cathode materials, in particular to a simultaneously doped and coated double-modified nickel-based lithium-ion battery cathode material and a preparation method thereof. Background technique [0002] With the increase of nickel content, nickel-based lithium-ion battery cathode material LiNi x co y m z o 2 (M is one of Mn, Al, Cr, Mg or a combination of at least two metal elements, 0.7≤x<1.0, 0<y≤0.2, 0≤z≤0.1, x+y+z=1) preparation Accompanied by many technical difficulties, such as Ni 2+ Difficult to oxidize to Ni 3+ , and Ni 3+ Unstable, prone to spontaneous reduction to Ni at temperatures above 600°C 2+ , which leads to the increase of lithium-nickel mixing in the positive electrode material with high nickel content, which affects the activity and cycle stability of the material; the increase of the surface soluble alkali content makes the material moisture content high, resulting ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/1391H01M4/362H01M4/505H01M4/525H01M4/62H01M10/0525Y02E60/10
Inventor 傅儒生杨顺毅黄友元任建国
Owner BTR NEW MATERIAL GRP CO LTD
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