Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Battery cathode material precursor, battery cathode material as well as preparation method and application of battery cathode material precursor

A battery cathode and precursor technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of electrochemical performance impact, complex modification process, few material doping modification, etc. simple method effect

Active Publication Date: 2019-05-17
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) An edge reaction occurs at the interface between the electrode and the electrolyte to generate Li 2 CO 3 Or by-products such as LiOH, these shortcomings have a great impact on its electrochemical performance
Although the current method of ion doping has made great progress in stabilizing the structure and improving the electrochemical performance, most of these doping modification methods are based on the elemental modification of the material during the high-temperature calcination stage of lithium mixing after the precursor is synthesized. Doping, there are few reports on the in-situ doping modification of materials during the precursor synthesis stage
[0006] Compared with the in-situ doping modification, the ex-situ doping modification is difficult to dope the doping elements into the material body to occupy the position of the transition metal, and the ex-situ doping method also makes the modification more complicated process

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
  • Battery cathode material precursor, battery cathode material as well as preparation method and application of battery cathode material precursor
  • Battery cathode material precursor, battery cathode material as well as preparation method and application of battery cathode material precursor
  • Battery cathode material precursor, battery cathode material as well as preparation method and application of battery cathode material precursor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] As an aspect of the technical solution of the present invention, what it relates to is a kind of preparation method of the positive material precursor of battery, comprising:

[0037] Dissolving Ni-based nitrate, Co-based nitrate, Mn-based nitrate and Cd-based nitrate in absolute ethanol to obtain a mixed solution;

[0038] The mixed solution is subjected to solvothermal reaction to co-precipitate Ni, Co, Mn and Cd elements, and the obtained precipitate is post-treated to obtain a Ni-Co-Mn-Cd-based battery positive electrode material precursor.

[0039] The present invention performs in-situ doping modification on the material during the synthesis stage of the battery positive electrode material precursor, and the specific reaction principle is shown in the following equation:

[0040] 7CH 3 CH 2 OH+4NO 3 - →7CH 3 CHO+2NO↑+N 2 O+4OH - +5H 2 O; (1)

[0041] 3Ni 2+ +6OH - +2H 2 O→3Ni(OH) 2 2H 2 O↓; (2)

[0042] 2Co 2+ +Mn 2+ +6OH - →MnCo 2 o 4 ↓+3H 2 ...

Embodiment 1

[0071] The preparation and test method of lithium-ion battery positive electrode material precursor, battery positive electrode material (NCM-1), lithium-ion battery doped with 0.01mol Cd include the following:

[0072] (1) 34.545852g Ni(NO 3 ) 2 ·6H 2 O, 11.524788g Co(NO 3 ) 2 ·6H 2 O, 14.17284g Mn(NO 3 ) 2 (50wt% aqueous solution) and 0.61692g of Cd(NO 3 ) 2 4H 2 O was dissolved in 150ml of absolute ethanol, and the mixed solution was stirred at room temperature until it was completely dissolved, and then the solution was divided into three parts and moved to three 100mL polytetrafluoroethylene reactors; the reactors were moved into an oven at 150 Place it at ℃ for 12 hours; finally wash the precipitate 4 to 5 times with absolute ethanol, and then dry the precipitate in an oven at 80 ℃ for 12 hours. In order to make it have a good shape after high-temperature roasting, the First roast at 450°C for 5 hours in the furnace to obtain a 622 battery cathode material prec...

Embodiment 2

[0081] The preparation and test method of lithium-ion battery cathode material precursor, battery cathode material (NCM-2), lithium-ion battery doped with 0.02mol Cd include the following:

[0082] (1) 34.197g Ni(NO 3 ) 2 ·6H 2 O, 11.408g Co(NO 3 ) 2 ·6H 2 O, 14.0296g Mn(NO3 ) 2 (50wt% aqueous solution) and 1.234g of Cd(NO 3 ) 2 4H 2 O was dissolved in 100ml of absolute ethanol, and the mixed solution was stirred at room temperature until it was completely dissolved, and then the solution was divided into three parts and moved to three 100mL polytetrafluoroethylene reactors; the reactors were moved into an oven at 150 Place it at ℃ for 10h; Finally, wash the precipitate with absolute ethanol 4 to 5 times, and then dry the precipitate in an oven at 70°C for 14h. In order to make it have a good shape after high-temperature roasting, the First roast at 440°C for 6 hours in the furnace to obtain a 622 battery cathode material precursor with a doping amount of 0.02mol Cd; ...

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
retention rateaaaaaaaaaa
retention rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a battery cathode material precursor. The preparation method comprises the following steps: dissolving Ni-based nitrate, Co-based nitrate, Mn-based nitrate and Cd-based nitrate in absolute ethyl alcohol, so that mixed solution is obtained; performing solvothermal reaction on the mixed solution, so that Ni, Co, Mn and Cd elements are co-precipitated;and performing post treatment on the obtained precipitates, so that a Ni-Co-Mn-Cd-based battery cathode material precursor is obtained. The preparation method disclosed by the invention utilizes the characteristic that four elements, namely Ni, Co, Mn and Cd, are similar in Ksp, a solvothermal method is utilized for co-precipitating the four elements in a solvothermal synthesis process, so that the Ni-Co-Mn-Cd-based battery cathode material precursor is obtained, and then a Cd doped ternary battery cathode material is synthesized by virtue of a high temperature solid phase roasting method. Cdis taken as an inactive element with good conductivity, and a structure of the material can be stabilized and electronic conductivity of the material can be improved after the Cd is doped.

Description

technical field [0001] The invention relates to a battery positive electrode material, in particular to a battery positive electrode material precursor, a battery positive electrode material, a preparation method and application thereof. Background technique [0002] Layered high-nickel cathode materials are considered to be one of the most promising cathode materials for lithium-ion batteries due to their high capacity and low cost, however, due to their unsatisfactory cycle performance, storage performance, low Coulombic efficiency and thermal Instability limits its commercial use. The main reasons for this phenomenon are: [0003] (1) Because Ni 2+ (0.069nm) and Li + (0.076nm) have the same radius, Li occurs in the layered structure + / Ni 2+ mixed row; [0004] (2) An edge reaction occurs at the interface between the electrode and the electrolyte to generate Li 2 CO 3 Or by-products such as LiOH, these shortcomings have a great impact on its electrochemical perfor...

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): H01M4/505H01M4/525H01M10/0525
CPCY02E60/10
Inventor 周园董生德海春喜曾金波申月李翔任秀峰孙艳霞漆贵财马路祥
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com