Oxygen vacancy-contained and Fe site-doped lithium ferric phosphate and rapid solid-phase sintering method thereof
A technology of lithium iron phosphate and solid phase sintering, applied in chemical instruments and methods, phosphorus compounds, structural parts, etc., can solve problems such as unstable product performance, high energy consumption, and long sintering time, and achieve excellent processing performance of pole pieces , reduce the reaction temperature, the effect of fast reaction speed
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0039] Embodiment 1: Preparation of lithium iron phosphate cathode material LiFe of the present invention 0.8 Mg 0.1 Na 0.1 PO 3.95
[0040] First, weigh lithium hydroxide monohydrate, iron oxide, magnesium hydroxide, sodium fluoride and ammonium dihydrogen phosphate according to the molar ratio of 1:0.8:0.1:0.1:1, and add glucose with a mass ratio of 12% of the mixture, and put Put it into a sand mill, the ratio of ball material to water is 2:1:1, and mix for 3.5 hours. The mixed slurry is oven-dried, then made into a block using a continuous extruder, and put into a microwave reaction furnace, under 10 liters / minute of high-purity Ar gas and hydrogen gas mixture (wherein the hydrogen volume ratio is 8 %) protection, the temperature was raised to 650° C. at a rate of 50° C. / min, kept for 45 minutes, and then cooled to room temperature. After the sintered material is crushed with a crusher, it is classified on a jet mill to obtain lithium iron phosphate with uniform parti...
Embodiment 2
[0047] Preparation of lithium iron phosphate material LiFe containing oxygen vacancies of the present invention 0.98 mn 0.02 PO 3.97 N 0.02
[0048] First, take lithium hydroxide monohydrate, iron oxide, trimanganese tetraoxide, ammonium dihydrogen phosphate and lithium nitride according to the molar ratio of 0.94: 0.49: 0.0067: 1: 0.02, and add glucose with a mass ratio of 10% of the mixture, Put it into a sand mill, the ratio of balls to water is 2:1:1, and mix for 3 hours. Spray-dry the mixed slurry with a spray-drying tower, put it into a microwave reaction furnace, under the protection of 10 liters / min of high-purity Ar gas and hydrogen gas mixture, wherein the volume ratio of hydrogen is 6%, at 50°C / min The temperature was raised to 630°C at a certain rate, kept for 45 minutes, and then cooled to room temperature. After the sintered material is crushed with a crusher, it is classified on a jet mill to obtain lithium iron phosphate with uniform particles.
[0049] T...
Embodiment 3-6 and comparative example 1-3
[0053] According to the method of Example 2, the positive electrode material for the secondary lithium ion battery of the present invention composed of Table 1 is prepared, the difference is that, for the samples replaced by Fe sites and oxygen vacancies, the required dose is added to the precursor Ratio of precursors for corresponding doping elements. The rest of the preparation steps are the same as in Example 2.
PUM
Property | Measurement | Unit |
---|---|---|
density | aaaaa | aaaaa |
density | aaaaa | aaaaa |
particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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