Cathode material, alpha-Fe2O3, of high-capacity lithium ion battery and preparation method for material
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology for lithium ion batteries and negative electrode materials, which is applied in the field of electrochemistry, can solve the problem of no reference, and achieve the effects of good cycle stability, cost reduction, and uniform distribution.
Inactive Publication Date: 2012-07-18
SICHUAN UNIV
View PDF2 Cites 6 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, most of the reported articles control the particle morphology and size distribution of the product by adding surfactants, and there is no reference to the preparation of α-Fe2O2O3 patent, so the present invention has prepared submicron and well-dispersed spherical α-Fe2O3 without adding any surfactant , and used it as an anode material for lithium-ion batteries, and found that it exhibited a high electrochemical specific capacity, and has the potential to be used as an anode material for lithium-ion batteries for large-capacity energy storage
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0045] Weigh 20.2g analytically pure Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water to make 50ml, 1 mol / L Fe(NO 3 ) 3 aqueous solution, and then measure 30ml of 5 mol / L KOH aqueous solution prepared in advance, and pour it into Fe(NO 3 ) 3 Reaction precipitation in aqueous solution to obtain a suspension, and adjust the pH value to 10 with 25% ammonia solution, stir vigorously for half an hour, transfer the mixed solution into a 100ml Teflon hydrothermal reactor, put the reactor into an oven, and keep it at 180°C for 5 hours , cooled to room temperature in the air, separated by filtration, washed, and dried at 80°C for 12 hours to obtain the α - Fe 2 o 3 .
Embodiment 2
[0047] Weigh 20.2g analytically pure Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water to make 50ml, 1 mol / L Fe(NO 3 ) 3 aqueous solution, and then measure 30ml of 5 mol / L KOH aqueous solution prepared in advance, and pour it into Fe(NO 3 ) 3 Reaction precipitation in aqueous solution to obtain a suspension, and adjust the pH value to 10 with 25% ammonia solution, stir vigorously for half an hour, transfer the mixed solution into a 100ml Teflon hydrothermal reactor, put the reactor into an oven, and keep it at 190°C for 5 hours , cooled to room temperature in the air, separated by filtration, washed, and dried at 120°C for 8 hours to obtain the α - Fe 2 o 3 .
Embodiment 3
[0049] Weigh 20.2g analytically pure Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water to make 50ml, 1 mol / L Fe(NO 3 ) 3 aqueous solution, and then measure 30ml of 5 mol / L KOH aqueous solution prepared in advance, and pour it into Fe(NO 3 ) 3 Reaction precipitation in aqueous solution to obtain a suspension, and adjust the pH value to 10 with 25% ammonia solution, stir vigorously for half an hour, transfer the mixed solution into a 100ml Teflon hydrothermal reactor, put the reactor into an oven, and keep it at 200°C for 5 hours , cooled to room temperature in the air, separated by filtration, washed, and dried at 100°C for 12 hours to obtain the α - Fe 2 o 3 .
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 diameter
aaaaa
aaaaa
Login to view more
Abstract
The invention relates to a cathode material, alpha-Fe2O3, of a high-capacity lithium ion battery and a preparation method for the cathode material. According to the preparation method, soluble trivalent molysite and an alkali metal hydroxide easy to dissolve are adopted as raw materials, and the hematite alpha-Fe2O3 is prepared by a hydrothermal method. The preparation method comprises the following specific steps that: 1) aqueous solution of the trivalent molysite with molarity being 0.5mol/L-2mol/L and aqueous solution of the alkali metal hydroxide easy to dissolve with molarity being 2mol/L-6mol/L are prepared; 2) the aqueous solution of the trivalent molysite and the aqueous solution of the alkali metal hydroxide obtained in the step 1) are mixed to generate suspension, the suspension is stirred for certain time, and then ammonia water drops into the suspension, so that the pH value of the suspension is adjusted to be 9-13; and 3) the suspension obtained in the step 2) is poured into a hydrothermal reaction kettle which can be airtight, the hydrothermal reaction kettle is put into an oven to be heated at a temperature of 160 DEG C-200 DEG C and then is subjected to thermal insulation for 3 hours to 20 hours, and after the reaction is finished, a product is subjected to solid-liquid separation, washing and drying so as to obtain the alpha-Fe2O3. When serving as the cathode material of the lithium ion battery, the alpha-Fe2O3 prepared by the method has higher specific capacity and better cycling stability. According to the method, the operation is simple, the cost is low, additives are not required, and the product quality is stable.
Description
technical field [0001] The present invention belongs to electrochemical field here, be specifically related to a kind of high-capacity lithium-ion battery anode material α-Fe 2 o 3 and its preparation method. Background technique [0002] Due to its excellent characteristics, lithium-ion batteries have become the current battery system with better comprehensive performance. The further expansion of lithium-ion batteries puts forward higher requirements on the capacity and fast charge and discharge capabilities of lithium-ion batteries. Anode materials are one of the key factors determining the overall performance of lithium-ion batteries. At present, the anode materials of commercial lithium-ion batteries are still graphite-based anodes, but they have low specific capacity, poor rate discharge performance, and easy deposition of metal lithium during charging and discharging, which will cause certain safety hazards. Therefore, actively exploring a new type of lithium-ion ...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more