Lithium ferrous silicate anode material coated with crystalline carbon and preparation method thereof
A technology of lithium ferrous silicate and positive electrode materials, which is applied in the direction of battery electrodes, structural parts, electrical components, etc., can solve the problems of reducing the volumetric energy density of positive electrode materials, low tap density of products, and poor particle contact performance. Improved electrochemical performance, fine grain size, and high powder purity
Inactive Publication Date: 2011-10-05
TIANJIN UNIV
5 Cites 19 Cited by
AI-Extracted Technical Summary
Problems solved by technology
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 moreAbstract
The invention relates to a high-purity lithium ferrous silicate anode material coated with crystalline carbon and a preparation method thereof. In the lithium ferrous silicate anode material coated with the crystalline carbon, the particle diameter of powder is 50-350 nm, and the initial discharge capacity of the anode material at the rate of C/16 is 125.7-150.3 mAhg<-1>, the weight percent of carbon is 5-15 percent by weight; a Li2FeSiO4 precursor is prepared by using a sol-gel method which comprises the following steps of: with ascorbic acids as reductants and carbon sources, catalyzing by Fe(NO3)3 while reducing ferric ions to form crystalline graphite; and uniformly coating on surfaces of Li2FeSiO4 particles, thus, the electrical property of the Li2FeSiO4/C anode material is effectively improved. Taking a carbon coating amount of 10.1 percent by weight as an example, the synthesized powder has high purity and is free of impurity phases; the initial discharge capacity at the rate of C/16 is 150.3 mAhg<-1>; and after circulation forty times, the specific ratio is 137.2 mAhg<-1>, which embodies better rate performance and better circulation performance.
Application Domain
Technology Topic
Image
Examples
- Experimental program(5)
Example Embodiment
Example Embodiment
Example Embodiment
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
Property | Measurement | Unit |
Particle size | 50.0 ~ 350.0 | nm |
Particle size | 70.0 ~ 150.0 | nm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
Description & Claims & Application Information
We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
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 Similar technology patents
Jet Mill Producing Fine Silicon Powder
Owner:INTEGRATED PHOTOVOLTAICS
Method and apparatus for processing of spent lubricating oil
InactiveUS20120205289A1High purityGuaranteed economical operationEvaporationDistillation separationBoiling pointHydrocarbon
Owner:SEQUOIA GLOBAL INC
Control of formic acid impurities in industrial glacial acetic acid
InactiveUS20080293967A1High purityLess impuritiesOrganic compound preparationCarboxylic preparation from carbon monoxide reactionProtein carbonylChemistry
Owner:SCATES MARK O +1
Synthesis method of polymethacrylate pour point depressant
Owner:QINGDAO BAIZHONG CHEM TECH
Method for preparing silicon composite cathode material of lithium ion battery
InactiveCN101510602AEvenly dispersedHigh purityElectrode manufacturing processesSiliconSolventCarbon source
Owner:SHANGHAI JIAO TONG UNIV
Classification and recommendation of technical efficacy words
- High purity
- Fine grain
Control of impurities in reaction product of rhodium-catalyzed methanol carbonylation
InactiveUS20080293966A1Improve the level ofHigh purityOrganic compound preparationCarboxylic preparation from carbon monoxide reactionProtein carbonylCarbonylation
Owner:CELANESE INT CORP
Preparation of maytansinoid antibody conjugates by a one-step process
ActiveUS20120253021A1High purityImprove stabilityOrganic active ingredientsPeptide preparation methodsChemistryBy-product
Owner:IMMUNOGEN INC
Glucosyl Stevia Composition
ActiveUS20120214752A1High purityOvercome disadvantagesMilk preparationBiocideChemistrySteviol glycoside
Owner:PURECIRCLE SDN BHD