Spinel type lithium manganate electrode material and preparation method thereof

A type of lithium manganate and electrode material technology, applied in the field of spinel type lithium manganate electrode material and its preparation, can solve the problem of capacitance attenuation and other problems, and achieve the effect of promoting the sintering process, increasing the diffusion coefficient, and reducing BET

Active Publication Date: 2011-05-04
山东天骄新能源有限公司
View PDF2 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to avoid the deficiencies in the above-mentioned prior art, and provide a kind of spinel type lithium manganate electrode material and preparation method thereof with good high and low temperature cycle stability, solve the problem of using lithium manganate as positive electrode material The problem of capacity decay of lithium batteries during storage or discharge cycles

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
  • Spinel type lithium manganate electrode material and preparation method thereof
  • Spinel type lithium manganate electrode material and preparation method thereof
  • Spinel type lithium manganate electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Prepare the spinel type lithium manganate electrode material of the present invention according to the following steps

[0065] ①. Preparation of spherical modified lithium manganese oxide precursor by co-precipitation method

[0066] a. Preparation of raw material solution

[0067] The industrial grade content of 99.5% Mn(NO 3 ) 2 , prepared into 0.2mol / L manganese nitrate aqueous solution, for subsequent use;

[0068] The industrial grade content of 99.0% Al(NO 3 ) 3 9H 2 O, be mixed with the aluminum nitrate aqueous solution of 0.1mol / L, standby;

[0069] The industrial grade content is 99.0% Na 2 CO 3 , be prepared into a sodium carbonate aqueous solution with a concentration of 0.3mol / L for subsequent use;

[0070] b. Co-precipitation to prepare spherical lithium manganese oxide precursor

[0071] According to the proposed formula, the 0.2mol / L manganese nitrate aqueous solution prepared in step ①a was added to the co-precipitation kettle at a flow rate o...

Embodiment 2

[0082] Prepare the spinel type lithium manganate electrode material of the present invention according to the following steps

[0083] ①. Preparation of spherical modified lithium manganese oxide precursor by co-precipitation method

[0084] a. Preparation of raw material solution

[0085] The industrial grade content of 99.5% Mn(NO 3 ) 2 , prepared into 0.2mol / L manganese nitrate aqueous solution, for subsequent use;

[0086] 99.5% Mg(NO 3 ) 2 ·6H 2 O, be mixed with the magnesium nitrate aqueous solution of 0.1mol / L, for subsequent use;

[0087] The industrial grade content is 99.0% Na 2 CO 3 , be prepared into a sodium carbonate aqueous solution with a concentration of 0.3mol / L for subsequent use;

[0088] b. Co-precipitation to prepare spherical lithium manganese oxide precursor

[0089] According to the proposed formula, the 0.2mol / L manganese nitrate aqueous solution prepared in step ①a was added to the co-precipitation kettle at a flow rate of 9L / h, and the 0.1...

Embodiment 3

[0100] Prepare the spinel type lithium manganate electrode material of the present invention according to the following steps

[0101] ①. Preparation of spherical modified lithium manganese oxide precursor by co-precipitation method

[0102] a. Preparation of raw material solution

[0103] The industrial grade content of 99.5% Mn(NO 3 ) 2 , prepared into 0.2mol / L manganese nitrate aqueous solution, for subsequent use;

[0104] The industrial grade content is 99.5% Cr 2 (NO 3 ) 3 15H 2 O, prepared as 0.1mol / L chromium nitrate aqueous solution, for subsequent use;

[0105] The industrial grade content is 99.0% Na 2 CO 3 , be prepared into a sodium carbonate aqueous solution with a concentration of 0.3mol / L for subsequent use;

[0106] b. Co-precipitation to prepare spherical lithium manganese oxide precursor

[0107] According to the proposed formula, the 0.2mol / L manganese nitrate aqueous solution prepared in step ①a was added to the co-precipitation kettle at a flow...

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 spinel type lithium manganate electrode material and a preparation method thereof, belonging to a cell electrode active material, in particular to a lithium ion cell electrode active material and a preparation method thereof. Raw materials comprise lithium-source compounds and manganese-source compounds. The preparation method of the spinel type lithium manganate electrode material is characterized by comprising the following steps: a, carrying out doping modification on a spinel type lithium manganate LiMnO4 material by using a doping compound containing a metal element M, wherein the metal element M is any of Al, Mg or Cr, the doping position of M is manganese position, and the molecular formula of the modified lithium manganate electrode material is Li1-1.1Mn1.8M0.2O4; b, in the presence of buffer and fluosilicate impurity-removing agent, using a coprecipitation method to prepare a precursor of a lithium manganate material; and c, carrying out Al element coating on the lithium manganate material to form a layer of alumina coating film on the surface of the element Al. The invention provides the spinel type lithium manganate electrode material with good high-low temperature circulating stability and the preparation method of the spinel type lithium manganate electrode material; and according to the invention, the problem of capacitance attenuation existing in the process of storage or discharging circulation of a lithium cell taking lithium manganate as a positive material is solved.

Description

technical field [0001] The invention relates to a spinel lithium manganate electrode material and a preparation method thereof. It belongs to battery electrode active material. In particular, it relates to an electrode active material for a lithium ion battery and a manufacturing method thereof. Background technique [0002] The lithium manganese oxide electrode material with spinel structure has high working voltage, low price, wide source of raw materials, and no pollution to the environment. It is the most competitive electrode material especially in the field of power battery applications. Therefore, spinel-type lithium manganese oxide is considered to be one of the positive electrode materials for lithium batteries with good application prospects. [0003] However, in the prior art, lithium batteries using lithium manganate as the positive electrode material have obvious capacity decay during storage or discharge cycles, which hinders the wide application of lithium m...

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): H01M4/505H01M4/1391H01M10/0525
CPCY02E60/10
Inventor 郝伟石迪辉
Owner 山东天骄新能源有限公司
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