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

A kind of ferric oxide with pomegranate structure and its preparation method and application as lithium ion negative electrode active material

A ferric oxide, pomegranate-type technology, applied in structural parts, battery electrodes, secondary batteries, etc., can solve problems such as poor conductivity and poor cycle stability, and achieve the effects of buffering volume expansion, excellent rate performance, and simple steps

Inactive Publication Date: 2020-01-07
HUNAN YOUNENG HIGH TECH +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of poor cycle stability and poor conductivity caused by volume expansion in the process of using the existing ferric oxide material as the negative electrode material of lithium-ion batteries, the purpose of the present invention is to provide a special pomegranate-type structure with micro-nano size Ferric oxide, which is not easy to agglomerate, has better processing performance, and can effectively alleviate the volume change of ferric oxide negative electrode material in the process of charging and discharging when used as a lithium ion negative electrode material, and improve the conductivity of the negative electrode material

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
  • A kind of ferric oxide with pomegranate structure and its preparation method and application as lithium ion negative electrode active material
  • A kind of ferric oxide with pomegranate structure and its preparation method and application as lithium ion negative electrode active material
  • A kind of ferric oxide with pomegranate structure and its preparation method and application as lithium ion negative electrode active material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] ①Put 4.005g of polyferric sulfate into a high temperature resistant porcelain boat, and put the porcelain boat into the muffle furnace.

[0049] ②Set the heating rate of the muffle furnace to 10°C / min, the heating time to 80 minutes, and the holding time to 220 minutes to obtain 1.388 g of ferric oxide.

[0050] ③ Grind and mix 70mg of ferric oxide and 20mg of conductive carbon black powder evenly, then stir at room temperature for 0.5-1h, then add 10mg of polyvinylidene fluoride and stir for 0.5-1h at room temperature to obtain negative electrode slurry, and use a coating machine to prepare the negative electrode The slurry was coated on a copper foil, dried in a vacuum oven at 60° C. for 24 hours, and sliced ​​to obtain a negative electrode of ferric oxide.

[0051] ④Pair the ferric oxide negative electrode obtained in ③ with lithium metal, and use 1mol L -1 LiPF 6 The EC / DMC (volume ratio 1:1) solution was used as the electrolyte, and a CR2016 lithium-ion button ba...

Embodiment 2

[0053] ① Take 4.007g of polyferric sulfate and put it into a high temperature resistant porcelain boat, and put the porcelain boat into the muffle furnace.

[0054] ②Set the heating rate of the muffle furnace to 10°C / min, the heating time to 60 minutes, and the holding time to 220 minutes to obtain 2.359 g of ferric oxide.

[0055] ③ Grind and mix 70mg of ferric oxide and 20mg of conductive carbon black powder evenly, then stir at room temperature for 0.5-1h, then add 10mg of polyvinylidene fluoride and stir for 0.5-1h at room temperature to obtain negative electrode slurry, and use a coating machine to prepare the negative electrode The slurry was coated on a copper foil, dried in a vacuum oven at 60° C. for 24 hours, and sliced ​​to obtain a negative electrode of ferric oxide.

Embodiment 3

[0057] ① Take 4.003g of polyferric sulfate and put it into a high temperature resistant porcelain boat, and put the porcelain boat into the muffle furnace.

[0058] ②Set the heating rate of the muffle furnace to 10°C / min, the heating time to 90 minutes, and the holding time to 220 minutes to obtain 1.438 g of ferric oxide.

[0059] ③ Grind and mix 70mg of ferric oxide and 20mg of conductive carbon black powder evenly, then stir at room temperature for 0.5-1h, then add 10mg of polyvinylidene fluoride and stir for 0.5-1h at room temperature to obtain negative electrode slurry, and use a coating machine to prepare the negative electrode The slurry was coated on a copper foil, dried in a vacuum oven at 60° C. for 24 hours, and sliced ​​to obtain a negative electrode of ferric oxide.

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
sizeaaaaaaaaaa
sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses pomegranate-shaped structure iron trioxide, a preparation method thereof and application thereof as a lithium ion negative electrode active material. The pomegranate-shaped structure iron trioxide is composed of micron-sized iron trioxide shell coated nanoscale iron trioxide small balls. The preparation process comprises the step of carrying out thermal decomposition on polyferric sulfate so as to obtain the pomegranate-shaped structure iron trioxide. The preparation method is simple, high in efficiency and low in cost, and the prepared pomegranate-shaped structure irontrioxide serving as a lithium ion battery negative electrode material has excellent capacity, rate and cycle performance.

Description

technical field [0001] The invention relates to a ferric oxide material, in particular to a method for preparing ferric oxide with a special pomegranate structure by direct pyrolysis of polyferric sulfate, and as a negative electrode active material in high-capacity, high-rate performance lithium The invention relates to an application in an ion battery; it belongs to the technical field of lithium ion battery materials. Background technique [0002] In recent years, a variety of portable electronic devices have higher and higher requirements for batteries. Lithium-ion batteries rely on their high operating voltage, large specific capacity, long cycle life, less self-discharge, wide working range, no memory effect and no environment. Pollution and other advantages are widely used. Ferric oxide, as a new type of lithium-ion battery negative electrode material, has a high specific capacity (1005mAhg) in theory. -1 ), much higher than commercial graphite anode materials (372m...

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): H01M4/52H01M10/0525
CPCH01M4/523H01M10/0525Y02E60/10
Inventor 易小艺王苑唐祥
Owner HUNAN YOUNENG HIGH TECH
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