Na3V2(BO3)3 compound, and preparation and application thereof
A compound and oxide technology, applied in boron compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of difficult preparation, limited practical application of materials, poor cycle stability, etc., and achieve the effect of large cycle stability
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Embodiment 1
[0037] Example 1 Na 3 V 2 (BO 3 ) 3 High-temperature solid-phase preparation of compounds
[0038] 0.03mol of Na 2 CO 3 , 0.02mol of V 2 o 3 and 0.06mol of H 3 BO 3 Put it in an agate mortar and grind for half an hour. Then the hands were transferred to the crucible, and the crucible was placed in a tube furnace protected by inert gas Ar. Raise the furnace to 200-400°C at a rate of 1-10°C / min, keep it warm for 3-10 hours, and finally lower it to room temperature at a rate of 1-10°C / min. The synthesized materials were taken out, ground into powder and transferred to the crucible again, and put into a tube furnace protected by inert gas Ar. Raise the furnace to 600-900°C at a heating rate of 1-10°C / min, keep it warm for 10-40 hours, and finally lower it to room temperature at a rate of 1-10°C / min. The obtained product is taken out of the grinding component to obtain Na 3 V 2 (BO 3 ) 3 compound.
[0039] like figure 1 As shown, it is a gray-green powder with a t...
Embodiment 2
[0040] Example 2 Na 3 V 2 (BO 3 ) 3 Sol-gel preparation of compounds
[0041] Dissolve 0.03mol of oxalic acid in a beaker filled with deionized water, then add 0.02mol of VBO 3 , stirred in a constant temperature water bath at 70-80°C until a blue solution appeared, then added 0.01mol of H 3 BO 3 , 0.015mol of Na 2 CO 3 , continue stirring to form a blue-green sodium vanadium borate sol. The sol was baked in an oven at 80°C for about 10 hours to obtain a blue fluffy precursor. The precursor was ground into powder and placed in a crucible, which was placed in a tube furnace protected by inert gas Ar. Raise the furnace to 200-400°C at a rate of 1-10°C / min, keep it warm for 3-10 hours, and finally lower it to room temperature at a rate of 1-10°C / min. The synthesized materials were taken out, ground into powder and transferred to the crucible again, and put into a tube furnace protected by inert gas Ar. Raise the furnace to 600-900°C at a heating rate of 1-10°C / min, keep...
Embodiment 3
[0042] Example 3 Na 3 V 2 (BO 3 ) 3 High-temperature solid-phase preparation of / C cathode materials
[0043] 0.03mol of Na 2 CO 3 , 0.02mol of V 2 o 3 , 0.06mol of H 3 BO 3 and Na 3 V 2 (BO 3 ) 3 Put 20% sucrose by mass into an agate mortar and grind for half an hour. Then the hands were transferred to the crucible, and the crucible was placed in a tube furnace protected by inert gas Ar. Raise the furnace to 200-400°C at a rate of 1-10°C / min, keep it warm for 3-10 hours, and finally lower it to room temperature at a rate of 1-10°C / min. The synthesized materials were taken out, ground into powder and transferred to the crucible again, and put into a tube furnace protected by inert gas Ar. Raise the furnace to 600-900°C at a heating rate of 1-10°C / min, keep it warm for 10-40 hours, and finally lower it to room temperature at a rate of 1-10°C / min. The obtained product is taken out of the grinding component to obtain Na 3 V 2 (BO 3 ) 3 / C cathode material.
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