Lithium ion battery positive pole material layered transition metal composite oxide and method of preparation

A cathode material layer, lithium-ion battery technology, applied in the directions of alkali metal compounds, lithium compounds, electrode manufacturing, etc., can solve the problems of electrochemical specific capacity decay, slow electrochemical specific capacity decay, easy to change and other problems, achieve layered Complete structure, good cycle performance, easy operation effect

Inactive Publication Date: 2005-04-13
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a layered transition metal composite oxide for lithium-ion battery cathode material and its preparation method, which solves the problem that the layered oxide is easy to change as an electrode material structure, and the electrochemical specific capacity rapidly decays during the charging and discharging process. problems, achieving stable structure and slow electrochemical specific capacity decay

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
  • Lithium ion battery positive pole material layered transition metal composite oxide and method of preparation
  • Lithium ion battery positive pole material layered transition metal composite oxide and method of preparation
  • Lithium ion battery positive pole material layered transition metal composite oxide and method of preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1). Accurately weigh 0.04mol of Ni(NO 3 ) 2 ·6H 2 O and 0.02mol Mn(NO 3 ) 2 50% aqueous solution of 100mL of water to form a mixed salt solution A with a Ni / Mn molar ratio equal to 2; another accurately weigh 0.1mol of NaOH and 0.05mol of NaOH 2 CO 3 , use 100mL water to make mixed alkali solution B;

[0027] (2). Slowly drop the mixed alkali solution B into the vigorously stirred mixed salt solution A under air flow conditions for about 5 hours; the resulting slurry was crystallized at 30°C for 10 hours, centrifuged and washed to obtain Ni- Mn LDH wet cake;

[0028] (3). Weigh 0.066mol of LiOH·H 2 O (Li / Ni+Mn molar ratio is 1.1), add 10mL water to dissolve, mix evenly with LDH wet filter cake, dry at 70°C for 12h, then roast at 750°C for 24h, heating rate 10°C / min, and cool down to room temperature naturally, After calcination, the sample was fully washed with water until the pH was 7, and dried at 70 °C for 24 h to obtain a layered Li[Ni 0.67 mn 0.33 ]O 2 ...

Embodiment 2

[0034] (1). Accurately weigh 0.048mol of Co(NO 3 ) 2 ·6H 2 O and 0.012mol Mn(NO 3 ) 2 50% aqueous solution of 100mL of water to form a mixed salt solution A with a Ni / Mn molar ratio equal to 2; another accurately weigh 0.1mol of NaOH and 0.05mol of NaOH 2 CO 3 , use 100mL water to make mixed alkali solution B;

[0035] (2). Slowly drop the mixed alkali solution B into the vigorously stirred mixed salt solution A under air flow conditions for about 5 hours; the resulting slurry is crystallized at 30°C for 10 hours, centrifuged and washed to obtain Co- Mn LDH wet cake;

[0036] (3). Weigh 0.066mol of LiOH·H 2 O (Li / Co+Mn molar ratio is 1.1), add 10mL water to dissolve, mix evenly with LDH wet filter cake, dry at 70°C for 12h, then roast at 750°C for 24h, heating rate 10°C / min, naturally cool down to room temperature, After calcination, the sample was fully washed with water until the pH was 7, and dried at 70 °C for 24 h to obtain a layered Li[Co 0.80 mn 0.20 ]O 2 . ...

Embodiment 3

[0041] (1). Accurately weigh 0.015mol of Ni(NO 3 ) 2 ·6H 2 O, 0.03mol of Co(NO 3 ) 2 ·6H 2 O and 0.015mol Mn(NO 3 ) 2 50% aqueous solution of 100mL water to make a mixed salt solution A with a Ni / Co / Mn molar ratio equal to 1 / 2 / 1; another accurately weigh 0.1mol of NaOH and 0.05mol of NaOH 2 CO 3 , use 100mL water to make mixed alkali solution B;

[0042] (2). Slowly drop the mixed alkali solution B into the vigorously stirred mixed salt solution A under air flow conditions for about 5 hours; the resulting slurry was crystallized at 30°C for 10 hours, centrifuged and washed to obtain Ni- Co-Mn LDH wet cake;

[0043] (3). Weigh 0.066mol of Li 2 CO 3 (Li / Ni+Co+Mn molar ratio is 1.1), add 10mL water to dissolve, mix evenly with LDH wet filter cake, dry at 70°C for 12h, then roast at 800°C for 24h, heating rate 10°C / min, and cool down to room temperature naturally After calcination, the sample was fully washed with water until the pH was 7, and dried at 70°C for 24 hour...

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

This invention provides a laminated transition metal composite oxide of Li ionic cell positive material by distributing binary or triple transition metals on a board uniformly. The positive material is prepared by applying laminated cathode ion material water talc fore-body method, first of all, applying the common deposition method to prepare the M-N water talc then to carryout the dehydroxy step by lamination boards to turn those with positive charges to those with negative, at the same time, the interlamination cathode ions get out and Li ions are inserted into them to get a laminated positive material with the advantage of getting composite oxide electrode material in lamination structure and uniform distribution of CoNi and Mn transition metal on the board.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular provides a layered transition metal composite oxide for lithium ion battery anode materials and a preparation method thereof. The layered transition metal composite oxide is prepared by an anion layered precursor method. Background technique [0002] In lithium-ion batteries, the reversible specific capacity of positive electrode materials is low and the cycle performance is poor. It is a controlling factor affecting the overall performance of lithium-ion batteries and an important link in the research and development of lithium-ion batteries, especially the research and development of new high specific capacity and long cycle life. Cathode materials have always attracted people's attention. [0003] At present, people's research on lithium-ion battery cathode materials mainly focuses on LiCoO 2 , LiNiO 2 and spinel LiMn 2 o 4 several materials, among which LiC...

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): C01D15/00C01G1/02H01M4/02H01M4/04H01M4/48H01M4/50H01M4/52H01M4/58H01M10/36
CPCH01M4/131H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 段雪卫敏路艳罗
Owner BEIJING UNIV OF CHEM TECH
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