Keggin type phosphomolybdate-graphene composite material for lithium ion battery and preparation method thereof
A lithium-ion battery, phosphomolybdate technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor rate performance and low conductivity, and achieve good reproducibility, high specific capacity, and improved rate performance. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0019] Preparation steps:
[0020] (1) Preparation of insoluble Keggin type phosphomolybdate [(CH 3 CH 2 CH 2 CH 2 ) 4 N] 3 PMo 12 o 40 :
[0021] Under constant stirring conditions, 120ml containing 1.13g (3.5mmol) tetra-n-butylammonium bromide ([(CH 3 CH 2 CH 2 CH 2 ) 4 N]Br) aqueous solution was added dropwise to be dissolved with 1.83g (1mmol) phosphomolybdic acid (H 3 PMo 12 o 40 ) in 100ml aqueous solution, the mixed solution was reacted for 24h under the protection of nitrogen (at 80°C), and the obtained precipitate was washed three times with absolute ethanol and distilled water in turn; then vacuum-dried at 80°C for more than 24h to obtain insoluble Keggin Type phosphomolybdate [(CH 3 CH 2 CH 2 CH 2 ) 4 N] 3 PMo 12 o 40 .
[0022] (2)[(CH 3 CH 2 CH 2 CH 2 ) 4 N] 3 PMo 12 o 40 - Preparation of graphene composite material:
[0023] Dissolve 0.25g of graphene oxide in 300ml of water and ultrasonically vibrate (can be 1h), then add dropwis...
Embodiment 2
[0029] Preparation steps:
[0030] (1) Preparation of insoluble Keggin type phosphomolybdate K 3 PMo 12 o 40 :
[0031] Under the condition of constant stirring, 100ml of aqueous solution containing 0.26g (3.5mmol) potassium chloride was added dropwise to the solution containing 1.83g (1mmol) phosphomolybdic acid (H 3 PMo 12 o 40 ) in a 100ml aqueous solution, the mixed solution was reacted at 80°C for 24h under the protection of nitrogen, and the obtained precipitate was washed three times with absolute ethanol and distilled water; Salt K 3 PMo 12 o 40 .
[0032] (2)K 3 PMo 12 o 40 - Preparation of graphene composite material:
[0033] Dissolve 0.10g of graphene oxide in 400ml of water and ultrasonically vibrate for 1h, then add 5ml of 5% hydrazine solution dropwise and stir at 25°C for 2h, then add the K prepared in step (1) 3 PMo 12 o 40 , so that the added graphene oxide and K 3 PMo 12 o 40 The mass ratio is 5:100; after stirring at 25°C for 2h, ultrason...
Embodiment 3
[0037] Preparation steps:
[0038] (1) Preparation of insoluble Keggin-type phosphomolybdate Cs 3 PMo 12 o 40 :
[0039] Under the condition of constant stirring, 100ml of the aqueous solution containing 0.59g (3.5mmol) cesium chloride was added dropwise to the solution containing 1.83g (1mmol) phosphomolybdic acid (H 3 PMo 12 o 40 ) in a 100ml aqueous solution, the mixed solution was reacted at 80°C for 24h under the protection of nitrogen, and the obtained precipitate was washed three times with absolute ethanol and distilled water; Salt Cs 3 PMo 12 o 40 .
[0040] (2)Cs 3 PMo 12 o 40 - Preparation of graphene composites:
[0041] Dissolve 0.56g of graphene oxide in 600ml of water and vibrate ultrasonically for 1h, then add 6ml of 5% hydrazine solution dropwise and stir at 25°C for 2h, then add the Cs prepared in step (1) 3 PMo 12 o 40 , so that the added graphene oxide and Cs 3 PMo 12 o 40 The mass ratio is 25:100; after stirring at 25°C for 2 hours, ultr...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More