Process for preparing lithium ion battery anode material MnFe2O4/rGO with hydrothermal method

A lithium-ion battery and anode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of limited application, large volume expansion rate, high resistivity, etc., and achieve improved recombination degree, excellent electrochemical performance, crystallization degree of improvement

Active Publication Date: 2016-04-20
CHANGZHOU UNIV
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its shortcomings such as high resistivity, low conductivity, and large volume expansion rate, its application as a negative electrode material for lithium-ion batteries is limited.

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
  • Process for preparing lithium ion battery anode material MnFe2O4/rGO with hydrothermal method
  • Process for preparing lithium ion battery anode material MnFe2O4/rGO with hydrothermal method
  • Process for preparing lithium ion battery anode material MnFe2O4/rGO with hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) adopt improved Hummers method to prepare graphite oxide powder;

[0034] (2) Disperse 20 mg of the graphite oxide powder obtained in step (1) in 20 mL of water, stir for 10 min, and sonicate for 3 h to form dispersion A;

[0035] (3) Add 20 mL of ethylene glycol to the dispersion A obtained in step (2), and add 0.2 g of polyvinylpyrrolidone (molecular weight: 58,000), and sonicate for 10 minutes to form dispersion B;

[0036] (4) 10mL of MnCl 2 4H 2 O solution (1mol / L) and 10mL of FeCl 3 ·6H 2 O solution (2mol / L) joins in the dispersion liquid B that obtains in step (3), stirs 30min, forms mixed liquid C;

[0037] (5) Slowly add 1.5 mL of ammonia water with a mass concentration of solute of 25% to the mixed solution C obtained in step (4), and stir for 1 hour to form mixed solution D;

[0038] (6) Add 20 mg of sodium borohydride to the mixed liquid D obtained in step (5), stir for 10 min, then transfer to the reaction kettle, and react at 180° C. for 10 h;

[...

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
Reversible specific capacityaaaaaaaaaa
Current densityaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of preparation of lithium ion battery anode materials and particularly relates to a process method for preparing a lithium ion battery anode material MnFe2O4 / rGO with a hydrothermal method. According to the anode material MnFe2O4 / rGO, bivalent manganese salt, trivalent ferric salt and ammonia water are taken as raw materials and composited with a PVP (polyvinyl pyrrolidone) surface modified graphene material, and the defects of low conductivity and poor electrochemical performance of a single ferrite material serving as the lithium ion battery anode material are overcome. Lattice parameters of the original single ferrite material are changed through doping of Mn<2+>, more defect vacancies are formed in the material, and disembedding of lithium ions in the anode material is better facilitated; defects of large volume change rate and poor circulation stability of the single metallic oxide material serving as the lithium ion battery anode material are overcome with the addition of rGO. The prepared MnFe2O4 / rGO material has excellent electrochemical circulation and rate performance and meets the demands for novel lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical category of lithium ion battery negative electrode material preparation, and in particular relates to a hydrothermal method for preparing lithium ion battery negative electrode material MnFe 2 o 4 / rGO crafting method. Background technique [0002] Lithium-ion batteries, as an excellent energy storage device, have always had their own unique status in the field of modern energy storage due to their large capacity and good cycle performance. Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, and electrolytes. Its working principle is realized by the continuous intercalation and release of lithium ions between the positive and negative electrode materials. [0003] The selection of anode materials for lithium-ion batteries is of great significance to the improvement of the electrochemical performance of the entire lithium-ion battery. There are many classifica...

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): H01M4/36H01M4/52H01M4/587H01M10/0525
CPCH01M4/362H01M4/523H01M4/587H01M10/0525Y02E60/10
Inventor 任玉荣王佳伟贾树勇丁建宁
Owner CHANGZHOU UNIV
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