Recently, the reporter learned from the Institute of Process Engineering of the Chinese Academy of Sciences that Zhao Junmei, an associate researcher at the Institute of Green Chemical Research, developed a low-cost and convenient room temperature controllable technology for polyanionic compounds, and synthesized the high-voltage positive electrode material fluoride for sodium ion batteries for the first time. Sodium vanadate phosphate, which has excellent rate performance and long cycle performance without any Post-treatment, can be said that the laboratory research on sodium vanadium fluorophosphate has reached the international leading level. The research results were recently published in "The Cell" magazine's energy flagship journal "Joule."
In view of the high price of lithium resources and limited geological reserves, the sodium ion battery with similar working principle as lithium ion battery is expected. "Sodium reserves in the earth's crust are much higher than lithium, and it is expected to support the sustainable development of large-scale energy storage technology." Zhao Junmei told the journal Chinese Journal.
The large-scale, low-cost preparation of a kind of important sodium ion battery cathode material "polyanion compound sodium vanadium fluorophosphate" is restricting its commercialization process. These materials have an energy density of up to 480 Wh/kg. If sodium vanadium fluorophosphate can be industrially applied, the energy density of a full battery can be comparable to that of a lithium ion battery. This material was developed by French scientist J. in 1999. -M. Since Le Meins first reported, the high-temperature solid phase synthesis method has been used, and high energy consumption has led to high cost of the material.
The Zhao Junmei team has long been committed to low-energy green synthesis of sodium vanadium fluorophosphate. Recently, after a series of hydrothermal/solvent thermal synthesis methods were studied for sodium vanadium fluorophosphate, they further proposed that sodium metavanadate solution obtained by extracting vanadium from vanadium slag is used as raw material of vanadium to directly prepare sodium vanadium fluorophosphate. A convenient room temperature controllable preparation technology has been developed which will greatly reduce the production cost of the material.
The researchers introduced that sodium vanadium fluorophosphate obtained by this method is a microsphere with a multi-shell microstructure. The formation mechanism is mainly based on the in-situ generated bubbles as a soft template, and the gas-liquid-solid interface occurs. The result of layer self-assembly.
"The results of this research will certainly accelerate the industrialization of sodium vanadium fluorophosphate." Zhao Junmei believes.
It is reported that this is the first report of a one-step controllable synthesis of a polyanion compound at room temperature, which is also a challenge to conventional high temperature solid phase methods and hydrothermal synthesis methods for positive electrode materials.
Crimped Wire Mesh
Material: S.S./Iron/Steel Wire/Brass Wire
Features: Weaving with pre-crimped wire, offering strong structure
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Wire Mesh for Roast: Wire mesh for roast is woven and welded of stainless steel or low carbon Galvanized Wire. It is heat resisting, corrosion resisting, nonpoisonous, tasteless and convenient for handling. It has a fixed shape and can be used to roast flour food and meat. The shape can be round, square, curve and so on.
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Materials: Black steel wire, white steel wire, lead wire, stainless steel wire, etc.
Weaving and characteristics: Crimped before woven, stable structure.
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Specification List Of Crimped Wire Mesh/Wire Mesh For Roast |
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|
Wire Gauge SWG |
Wire Diameter mm |
Mesh/Inch |
Aperture mm |
Weight Kg/m² |
|
14 |
2.0 |
21 |
1 |
4.2 |
|
8 |
4.05 |
18 |
1 |
15 |
|
25 |
0.50 |
20 |
0.61 |
2.6 |
|
23 |
0.61 |
18 |
0.8 |
3.4 |
|
24 |
0.55 |
16 |
0.1 |
2.5 |
|
24 |
0.55 |
14 |
0.12 |
4 |
|
22 |
0.71 |
12 |
0.14 |
2.94 |
|
19 |
1 |
2.3 |
0.18 |
1.45 |
|
6 |
4.8 |
1.2 |
2 |
20 |
|
6 |
4.8 |
1 |
2 |
20 |
|
6 |
4.8 |
0.7 |
3 |
14 |
|
14 |
2.0 |
5.08 |
0.3 |
12 |
|
14 |
2.0 |
2.1 |
1 |
2.5 |
|
14 |
2.0 |
3.6 |
1.5 |
1.9 |
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