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

Lithium ion battery layered perovskite structure negative electrode material and preparation method thereof

A perovskite structure, lithium-ion battery technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve problems such as low conductivity and unfavorable performance of lithium-ion batteries, and achieve a simple preparation method and safe working voltage. , the effect of high reversible capacity

Inactive Publication Date: 2021-06-11
FUDAN UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In niobium-based oxide materials, La 1 / 3 NbO 3 It has an A-site vacancy layered perovskite structure, its La atomic layers and La atomic vacancy layers are alternately distributed, and NbO 6 The octahedrons share the top connection, and the vacancy layer in the structure is very suitable for intercalating Li + site and Li + channel, but the low Li + Conductivity is detrimental to its performance in lithium-ion batteries

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 layered perovskite structure negative electrode material and preparation method thereof
  • Lithium ion battery layered perovskite structure negative electrode material and preparation method thereof
  • Lithium ion battery layered perovskite structure negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The present invention also provides a preparation method of a layered perovskite structure negative electrode material for a lithium ion battery, the process of which is as follows figure 1 shown, including the following steps:

[0036] (1) Take the lithium source, the lanthanum source and the niobium source and ball mill and mix them uniformly to obtain the mixed material;

[0037] (2) Pre-sinter the resulting mixed material, cool to room temperature, continue ball milling, sinter again, and cool to room temperature to obtain the target product Li 0.1 La 0.3 NbO 3 , which has a layered perovskite structure.

[0038] In some embodiments, in step (1), the addition amount of lithium source, lanthanum source and niobium source satisfies the molar ratio of lithium element, lanthanum element and niobium element of 1:3:10.

[0039] In some embodiments, in step (1), the lithium source is lithium carbonate; the lanthanum source is lanthanum oxide; and the niobium source is ...

Embodiment 1

[0050] (1) Lithium carbonate, lanthanum oxide, and niobium pentoxide are put into a ball mill tank with a molar ratio of 1:3:10 for ball milling for 8 hours, and the rotating speed is 900 rpm, and are mixed uniformly by high-energy ball milling;

[0051] (2) Put the uniformly mixed raw materials into the muffle furnace, pre-sinter at 750°C for 5 hours, the heating rate is 5°C / min, and take it out after naturally cooling to room temperature;

[0052] (3) Then put the sintered powder into the ball mill jar for ball milling for 5 hours, and the rotating speed is 900rpm;

[0053] (4) Finally, put the powder into the muffle furnace, sinter at 1050°C for 10h, the heating rate is 5°C / min, and take it out after natural cooling to room temperature to obtain the pure phase Li 0.1 La 0.3 NbO 3 powder.

Embodiment 2

[0055] (1) Lithium carbonate, lanthanum oxide, and niobium pentoxide are put into a ball mill tank with a molar ratio of 1:3:10 for ball milling for 8 hours, and the rotating speed is 900 rpm, and are mixed uniformly by high-energy ball milling;

[0056] (2) Put the uniformly mixed raw materials into the muffle furnace, pre-sinter at 700°C for 4h, the heating rate is 5°C / min, and take it out after naturally cooling to room temperature;

[0057] (3) Then put the sintered powder into the ball mill jar for ball milling for 5 hours, and the rotating speed is 900rpm;

[0058] (4) Finally, put the powder into the muffle furnace, sinter at 1100°C for 10h, the heating rate is 5°C / min, take it out after natural cooling to room temperature, and the obtained powder is Li 0.1 La 0.3 NbO 3 , but with impurities.

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 relates to a lithium ion battery layered perovskite structure negative electrode material and a preparation method thereof. The chemical formula of the negative electrode material is Li0.1La0.3NbO3, and the preparation method specifically comprises the following steps: (1) weighing a lithium source, a lanthanum source and a niobium source, ball-milling and uniformly mixing to obtain a mixed material; (2) presintering the obtained mixed material, cooling to room temperature, continuing ball milling, sintering for the second time, and cooling to room temperature to obtain a target product. The lithium ion battery negative electrode material provided by the invention has the advantages of high coulombic efficiency, good rate capability, excellent cyclic charge-discharge stability and the like; besides, the preparation method is simple, is mainly oriented to the field of rapid charging and discharging equipment, and has a wide application prospect in the field of lithium ion batteries, in general, more choices are provided for the negative electrode material of the lithium ion battery, and development and further development of the electrode material of the lithium ion battery are facilitated.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and relates to a lithium ion battery layered perovskite structure negative electrode material and a preparation method thereof. Background technique [0002] From everyday electronic products to ubiquitous electric vehicles, lithium-ion batteries have been widely used in various areas of our lives. At present, graphite and spinel-structured Li 4 Ti 5 o 12 It is the two most popular anode materials for lithium-ion batteries, but they both have some shortcomings, which hinder the further development of lithium-ion batteries. Graphite has low cost, high reversible capacity and long cycle life at the same time, and its theoretical specific capacity is 375mAh g -1 . However, the use of graphite as a lithium ion anode material has great potential safety hazards. The working potential of graphite is extremely low, and its voltage platform is close to the potential of lithium metal depos...

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
IPC IPC(8): H01M4/485H01M10/0525C01G33/00
CPCH01M4/485H01M10/0525C01G33/006C01P2002/72Y02E60/10
Inventor 张捷车仁超熊旭辉杨利廷梁贵生
Owner FUDAN UNIV
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