Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of ruthenium, aluminum co-doped lithium cobalt oxide cathode material and preparation method thereof

A cathode material, lithium cobalt oxide technology, applied in the field of preparation of electrode materials for lithium ion batteries, can solve problems such as poor cycle stability, and achieve the effects of inhibiting phase transition, changing energy band distribution, and improving discharge specific capacity

Active Publication Date: 2022-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

E.Oz et al. (E.Oz, et al.Fabrication and electrochemical properties of LiCo1-xRuxO2 cathode materials for Li-ionbattery[J].Journal of Alloys and Compounds,2016.) obtained LiCo 1-x Ru x o 2 (where x=0.0~0.5), when the optimal doping ratio x=0.1, the specific discharge capacity of doped lithium cobalt oxide in the first cycle under the discharge platform of 3.5~4.5V is 149.9mAh / g, which is not as good as that of the original lithium cobalt oxide The first release is 168.4mAh / g, and the capacity after 100 cycles is only 71.2%, and the cycle stability is also poor

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
  • A kind of ruthenium, aluminum co-doped lithium cobalt oxide cathode material and preparation method thereof
  • A kind of ruthenium, aluminum co-doped lithium cobalt oxide cathode material and preparation method thereof
  • A kind of ruthenium, aluminum co-doped lithium cobalt oxide cathode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] A method for preparing a ruthenium, aluminum co-doped lithium cobalt oxide positive electrode material, comprising the following steps:

[0027] Step 1, lithium hydroxide monohydrate LiOH · H 2 O and citric acid C 6 h 8 o 7 Add in deionized water, stir and mix evenly to obtain solution A; wherein in solution A, the concentration of lithium hydroxide is 17g / L, and the concentration of citric acid is 240g / L;

[0028] Step 2, Co(CH 3 COO) 2 4H 2 O, RuCl 3 ·3H 2 O and Al(NO 3 ) 3 9H 2 O is dissolved in deionized water to obtain solution B; wherein, in solution B, the concentration of the cobalt compound is 100g / L;

[0029] Step 3. Add solution B dropwise to solution A under constant stirring at 55°C and 300r / min to obtain solution C; in the obtained solution C, the molar ratio Li:Co:Ru:Al is about 1020:998:1 :1;

[0030] Step 4. Under constant stirring at 55°C and 300r / min, add ammonia water dropwise to the solution C until its pH=7, then place it in a water ba...

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 discloses a ruthenium and aluminum co-doped lithium cobalt oxide positive electrode material, which belongs to the technical field of preparation of lithium ion battery electrode materials. The chemical formula of the ruthenium and aluminum co-doped lithium cobaltate cathode material is LiCo 1‑x‑ y Ru x al y o 2 , where, 0.0005≤x≤0.015, 0.0005≤y≤0.015. Under the co-doping of aluminum and ruthenium, the lithium cobaltate positive electrode material of the present invention significantly improves its discharge specific capacity, and its cycle stability at 4.5V and 4.6V is also improved.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium ion battery electrode materials, in particular to a ruthenium and aluminum doped lithium cobalt oxide positive electrode material and a preparation method thereof. Background technique [0002] With the rise of electric vehicles and grid energy storage base stations, higher requirements are placed on the energy density of lithium-ion batteries. By increasing the specific capacity of positive active materials, the energy density of lithium-ion batteries can be effectively improved. Compared with other cathode materials, LiCoO 2 It has unique advantages: high working voltage (average working voltage is 3.7V), stable charge and discharge voltage, suitable for high current charge and discharge, high specific energy, good cycle performance, high conductivity, high compaction density, has been in the battery dominate the market. LiCoO 2 The theoretical specific capacity is 274mAh / g, bu...

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 Patents(China)
IPC IPC(8): H01M4/525H01M10/0525
CPCH01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 向勇张祎马祥张晓琨
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com