Lithium battery positive electrode material and preparation method thereof

A cathode material, lithium battery technology, applied in battery electrodes, active material electrodes, chemical instruments and methods, etc., to achieve easy control, improve low-temperature electrochemical performance, and reduce low-temperature impedance.

Active Publication Date: 2022-05-17
FOSHAN DYNANONIC +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above improved technologies did not make LiFePO 4 The battery meets the requirements of practical application at low temperature

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 battery positive electrode material and preparation method thereof
  • Lithium battery positive electrode material and preparation method thereof
  • Lithium battery positive electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] This embodiment provides a method for preparing a lithium battery positive electrode material, comprising the following steps:

[0084] (1) Take 148.68g Li 2 CO 3 , 224.93g Fe 2 o 3 , 600g (NH 4 ) 3 PO 4 , 104.96gMnO 2 , dissolved in a solution containing complexing agent, mixed evenly, and prepared LiMn by liquid phase method 0.3 Fe 0.7 PO 4 Precursor.

[0085] The complexing agent can be one or more of citric acid, tartaric acid, succinic acid, oxalic acid, sulfosalicylic acid and lactic acid, and citric acid is used in this embodiment.

[0086] (2) LiMn 0.3 Fe 0.7 PO 4 The precursor is added to water and mixed evenly. The ratio of the precursor to water is: the amount of water used is 100% of the mass of the precursor; then sand milled, and then passed through a 3000-mesh sieve, and the obtained filtrate is the slurry.

[0087] (3) The filtrate was pumped into the reaction kettle with a carbon material three-dimensional grid by a metering pump at a rate...

Embodiment 2

[0099] This embodiment provides a method for preparing a lithium battery positive electrode material, comprising the following steps:

[0100] (1) Take 148.68g Li 2 CO 3 , 224.93g Fe 2 o 3 , 600g (NH 4 ) 3 PO 4 , 104.96gMnO 2 , dissolved in a solution containing citric acid and mixed evenly, and the LiMn was obtained by the liquid phase method 0.3 Fe 0.7 PO 4 Precursor.

[0101] (2) LiMn 0.3 Fe 0.7 PO 4 Add the precursor to water, the ratio of the precursor to water is: the amount of water is 150% of the mass of the precursor, then add 25.89g of sucrose and mix evenly, sand mill and pass through a 3000-mesh screen to obtain the filtrate, which is the slurry .

[0102] (3) The filtrate is pumped from the upper, middle and lower parts of the reactor by a metering pump at a speed of 1mL / min. The reactor used is the same as in Example 1, and the carbon material three-dimensional grid 3 is formed by interconnecting carbon fiber filaments with a diameter of 3nm. netwo...

Embodiment 3

[0105] This embodiment provides a method for preparing a lithium battery positive electrode material, comprising the following steps:

[0106] (1) Take 727.51g Li 2 CO 3 , 1493.66g Fe 2 o 3 , 4000g (NH 4 ) 3 PO 4 , 85.60gMnO 2 , dissolved in a solution containing citric acid, mixed evenly, and prepared LiMn by liquid phase method 0.05 Fe 0.95 PO 4 Precursor.

[0107] (2) LiMn 0.05 Fe 0.95 PO 4 Add the precursor to water, and the ratio of the precursor to water is as follows: the amount of water is 100% of the mass of the precursor, and then 75.68g of glucose is added to mix evenly, sand-milled and passed through a 2500-mesh sieve, and the obtained filtrate is the slurry.

[0108] (3) The filtrate is pumped from the upper, middle and lower parts of the reactor by a metering pump at a speed of 1mL / min. The reactor used is the same as in Example 1, and the carbon material three-dimensional grid 3 is formed by interconnecting carbon fiber filaments with a diameter of ...

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
pore sizeaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of lithium battery materials, and particularly discloses a lithium battery positive electrode material and a preparation method thereof. The lithium battery positive electrode material is prepared by adopting a reaction kettle with a carbon material three-dimensional grid. According to the lithium battery positive electrode material provided by the invention, a plurality of long-range orderly through and communicated pore channels are formed in the positive electrode material. The electrochemical performance of the battery at low temperature can be improved by directionally constructing a long-range ordered pore channel in the positive electrode material.

Description

technical field [0001] The invention belongs to the technical field of lithium battery materials, and in particular relates to a lithium battery cathode material and a preparation method thereof. Background technique [0002] LiFePO 4 The positive electrode material has a wide range of raw materials, no environmental pollution, good safety performance, and long cycle life, making it stand out among many lithium-ion battery cathode materials, and is considered to be one of the most promising lithium-ion battery cathode materials. Using LiFePO 4 The manufactured lithium-ion battery has high safety performance, is suitable for use as a power battery, and has good medium-rate cycle performance, and the cycle life can reach thousands of times. [0003] However, LiFePO 4 As a power battery, lithium-ion batteries have poor low-temperature performance, which affects LiFePO 4 Application of lithium-ion batteries in low-temperature special environments. According to the analysis,...

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): C01B25/45H01M4/02H01M4/58B82Y30/00B82Y40/00
CPCC01B25/45H01M4/02H01M4/5825B82Y30/00B82Y40/00H01M2004/021C01P2002/72C01P2004/04C01P2004/61C01P2006/16C01P2004/64C01P2006/14C01P2006/40Y02E60/10
Inventor 徐荣益李亨利孔令涌李意能刘其峰
Owner FOSHAN DYNANONIC
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