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

Rare earth-doped power battery anode material and preparation method thereof

A technology for power batteries and positive electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low electron transfer rate and ion diffusivity, polluting environmental raw materials, unsafe batteries, etc., to achieve accurate pH adjustment, avoid The effect of spreading and maintaining uniformity

Inactive Publication Date: 2013-07-03
IRICO
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] LiNiO 2 Ni during charging 3+ are more easily reduced by the electrolyte, resulting in O 2 released, it will also lead to unsafe battery
LiMn 2 o 4 Although it has a stable structure and avoids the generation of dendrites, Mn has a variety of valence states (including +2, +3, +4, +7), and it is easy to react with the electrolyte, resulting in the attenuation of its capacity.
Ternary material LiNi x co y mn z o 2 Although it has good stability and gram capacity, it contains Co, which also has the problems of polluting the environment and scarcity of raw materials.
[0008] Currently LiFePO 4 The existing technical problem is that the capacitance will drop significantly when charging and discharging with high current
The main reason is that LiFePO 4 The electron transport rate and ion diffusivity in the medium are low, and the general method is to pass the LiFePO 4 The particle surface is coated with carbon to improve its electron transport rate, and its ion diffusivity is improved by doping transition metals

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
  • Rare earth-doped power battery anode material and preparation method thereof
  • Rare earth-doped power battery anode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Mix 0.99mol LiCl, 0.99mol FeSO 4 ·7H 2 O, 1molH 3 PO 4 , 0.01mol LaCl 3 and 0.5mol urea were dissolved in 100g deionized water to obtain a uniform solution. When the solution was heated to 60°C in a water bath, the pH of the solution was adjusted to 5.0, and the solution was stirred rapidly for 10 hours and then suction filtered to obtain a precipitate. Wash it 4 times with deionized water ;

[0033] Then put the obtained precipitate into 1L of deionized water, stir rapidly for 1 hour to form a suspension, and then spray-dry the suspension at 180°C to collect the precursor;

[0034] 2) The precursor obtained by drying is filled with N 2 / H 2 Mixed gas (N 2 :H 2 =9: 1, volume ratio) in the tube furnace for sintering:

[0035] The heating rate is 3°C / min, when the temperature reaches 200°C, it is kept for 3 hours, and the flow rate of 100ml / min H 2 ; Then continue to heat up, when the temperature reaches 680 ° C, keep warm for 5 hours, then drop to room tempe...

Embodiment 2

[0037] 1) Mix 0.98mol LiBr, 0.98mol FeSO 4 ·7H 2 O, 1molH 3 PO 4 , 0.02mol YCl 3 and 0.5mol urea were dissolved in 100g deionized water to obtain a homogeneous solution, heated the solution to 60°C in a water bath, adjusted the pH of the solution to 7.0, stirred the solution rapidly for 10 hours and then filtered it with suction to obtain a precipitate and washed it 4 times with deionized water;

[0038] Then put the obtained precipitate into 1L of deionized water, stir rapidly for 1 h to form a suspension, and then spray dry at 200°C to collect the obtained precursor;

[0039] 2) The precursor obtained by drying is filled with N 2 / H 2 Mixed gas (N 2 :H 2 =3:1, volume ratio) in the tube furnace for sintering:

[0040] The heating rate is 3°C / min, when the temperature reaches 200°C, it is kept for 3 hours, and the flow rate of 100ml / min H 2 ; Then continue to heat up, when the temperature reaches 680 ° C, keep it warm for 16 hours, then drop to room temperature, and t...

Embodiment 3

[0043] 0.99mol Li 2 CO 3 , 0.99mol FeSO 4 ·7H 2 O, 1mol NH 4 h 2 PO 4 , 0.01mol CeCl 3 and 0.5mol urea were dissolved in 100g deionized water to obtain a homogeneous solution, heated the solution to 50°C in a water bath, adjusted the pH of the solution to 5.8, stirred the solution rapidly for 24 hours and then filtered it with suction to obtain a precipitate and washed it with deionized water 5 times;

[0044] Then put the obtained precipitate into 1L of deionized water, stir rapidly for 1 hour to obtain a suspension, and then freeze-dry at -20°C to collect the precursor;

[0045] 2) The precursor obtained by drying is filled with N 2 / H 2 =99:1 (volume ratio) for sintering in a tube furnace:

[0046] The heating rate is 3°C / min. When the temperature reaches 220°C, keep it warm for 5 hours, and then continue to heat up. When the temperature is below 20-280°C, the flow rate of 150ml / min H 2 ;When the temperature reaches 750°C, keep it warm for 5h, then drop to room te...

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 rare earth-doped power battery anode material and a preparation method thereof. The rare earth-doped power battery anode material is a novel material with the chemical compositions shown as (LiFe)1-xRxPO4, which is synthesized by a liquid phase method, wherein R is La, Ce, Pr, Tb, Ho, Lu, Y or Sc, and x is more than or equal to 0.00001 and less than or equal to 0.05. By doping a rare earth element, Li+ vacant sites can be generated in LiFePO4, and the diffusion rate of the Li+ is improved; meanwhile, the doped rare earth element can capture impurities in the LiFePO4 material so as to avoid the diffusion of the impurities in the LiFePO4; therefore, the diffusion rate of the Li+ and electron transmission rate in the LiFePO4 are improved.

Description

technical field [0001] The invention belongs to the technical field of power battery materials, and relates to a lithium-ion battery nanoscale cathode material, in particular to a rare earth-doped power battery cathode material LiFeRPO 4 and its preparation method. Background technique [0002] With the huge non-renewable consumption of traditional energy and the increasingly serious environmental pollution problems in the use process, the world is paying great attention to clean energy. The current clean energy includes nuclear energy, solar energy, wind energy, hydro energy and biomass energy. Obtaining clean energy from nature has become a technology in use, and how to store and use the obtained energy will be the biggest problem at present. [0003] The consumption of oil is the largest among all fossil energy sources. The oil demanded by global automobiles accounts for more than half of the total oil consumption. At the same time, more than 42% of global air pollution...

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): H01M4/136H01M4/1397
CPCY02E60/122Y02E60/10
Inventor 王大伟陶淳
Owner IRICO
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