Vanadium-lithium phosphate composite material for positive electrode of lithium ion battery and preparation method thereof
A lithium-ion battery and lithium vanadium phosphate technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as high-rate charge and discharge performance of lithium-ion batteries, and achieve safe use and excellent high-rate performance , The effect of high charge and discharge capacity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0015] Example 1:
[0016] Press Li 3 V 2 (PO 4 ) 3 The stoichiometric ratio of the raw material Li 2 CO 3 , NH 4 H 2 PO 4 And NH 4 VO 3 Mix, add 10% of the total mass of raw materials MWCNTs and PVA, the weight ratio of MWCNTs:PVA is 1:1, add 15ml of absolute ethanol and ball mill on a ball mill for 10 hours, and set the ball mill speed to 350 rpm. The raw materials are taken out and dried and put into a tube furnace. They are calcined in an argon atmosphere (air flow rate of 80ml / min) at 850℃ for 10 hours to obtain in-situ coated Li amorphous carbon modified by multi-walled carbon nanotubes. 3 V 2 (PO 4 ) 3 The powder formed on the surface (Li 3 V 2 (PO 4 ) 3 / C), containing 98% Li by mass percentage 3 V 2 (PO 4 ) 3 , 2% carbon.
[0017] The obtained product was analyzed by XRD, which showed that all were Li 3 V 2 (PO 4 ) 3 , There is no impurity phase, the particle size of the product can be obtained by SEM is 200-600nm, and the MWCNTs are evenly distributed among the particles. ...
Example Embodiment
[0021] Example 2:
[0022] Press Li 3 V 2 (PO 4 ) 3 The stoichiometric ratio of the raw material Li 2 CO 3 , NH 4 H 2 PO 4 And NH 4 VO 3 Mix, add 20% of the total mass of the raw materials MWCNTs and PVA, the weight ratio of MWCNTs:PVA is 1:1, add 15ml of absolute ethanol to ball mill on a ball mill for 10 hours, and set the ball mill speed to 350 rpm. The raw materials are taken out and dried and put into a tube furnace. They are calcined at 850°C for 10 hours in an argon atmosphere (air flow rate is 80ml / min) to obtain MWCNTs modified Li 3 V 2 (PO 4 ) 3 / C Cathode material, containing 96.5% Li by mass percentage 3 V 2 (PO 4 ) 3 , 3.5% carbon.
[0023] The obtained product was analyzed by XRD, which showed that all were Li 3 V 2 (PO 4 ) 3 , There is no impurity phase, the particle size of the product can be obtained by SEM is 200-600nm, and the MWCNTs are evenly distributed among the particles.
[0024] The prepared MWCNTs modified Li 3 V 2 (PO 4 ) 3 / C The positive electrode materi...
Example Embodiment
[0027] Example 3:
[0028] Press Li 3 V 2 (PO 4 ) 3 The stoichiometric ratio of the raw material Li 2 CO 3 , NH 4 H 2 PO 4 And NH 4 VO 3 Mixing, adding 30% of the total mass of the raw materials MWCNTs and PVA, the weight ratio of MWCNTs:PVA is 1:1, adding 15 ml of absolute ethanol and ball milling on the ball mill for 10 hours, the ball mill speed is set to 350 rpm. The raw materials are taken out and dried and put into a tube furnace. They are calcined at 850°C for 10 hours in an argon atmosphere (air flow rate is 80ml / min) to obtain MWCNTs modified Li 3 V 2 (PO 4 ) 3 / C Cathode material, containing 95% Li by mass percentage 3 V 2 (PO 4 ) 3 , 5% carbon.
[0029] The obtained product was analyzed by XRD, which showed that all were Li 3 V 2 (PO 4 ) 3 , There is no impurity phase, the particle size of the product can be obtained by SEM is 200-600nm, and the MWCNTs are evenly distributed among the particles.
[0030] The prepared MWCNTs modified Li 3 V 2 (PO 4 ) 3 / C The positive elect...
PUM
Property | Measurement | Unit |
---|---|---|
Particle size | aaaaa | aaaaa |
Electronic conductivity | 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.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap