Copper-doped vanadate electrode material as well as preparation method and application thereof
An electrode material, copper doping technology, applied in the direction of positive electrode, battery electrode, active material electrode, etc., can solve the problems of low voltage and small diffusion coefficient crystal structure of sodium ion battery
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Embodiment 1
[0032] A method for preparing a copper-doped vanadate electrode material with a three-dimensional network structure, comprising the following steps:
[0033] Step 1, put 1.0×10 -3 mol of NH 4 VO 3 , 5.0×10 -4 mol of Na 2 CO 3 and 1.0×10 -3 mol of Cu(NO 3 ) 2 ·3H 2 O was added to a beaker with 50 mL of distilled water, and stirred thoroughly until the mixture was dissolved to form a mixed solution;
[0034] Step 2, adding 3×10 -3 mol citric acid saturated solution of citric acid, then heated and stirred in a water bath at 80°C for 5 hours, and then put it into a ventilated drying oven at 80°C for 24 hours to form a xerogel precursor;
[0035] Step 3. Put the xerogel precursor into a muffle furnace for calcination. The calcination temperature is 500° C. and the calcination time is 6 hours to obtain a copper-doped vanadate electrode material with a three-dimensional network structure.
[0036] Carry out X-ray diffractometer test to the three-dimensional network structu...
Embodiment 2
[0040] This embodiment is basically the same as the steps in embodiment 1, the difference is that in step 1, the added VO 2 NO 3 1.5×10 -3 mol, NaHCO 3 1×10 -3 mol; in step 2, add 3.5×10 -3 mol citric acid citric acid solution, the temperature of hydrothermal reaction is 100°C, the time is 4h, the temperature of drying is 100°C, and the drying time is 18h.
[0041] The X-ray test, scanning electron microscope test, selected area electron diffraction and electrochemical performance test of the button cell were carried out on the three-dimensional network structure copper-doped vanadate electrode material. The X-ray test showed that the prepared product was Cu-doped NaVO 3 , Scanning electron microscope test shows that the obtained product is granular, and interconnected, interlaced to form a three-dimensional network structure, from the selected area electron diffraction (SAED) pattern, it can be clearly seen that the synthesized sample is a single crystal structure.
Embodiment 3
[0043] The steps in this embodiment are basically the same as in Example 1, the difference is that in step 1, the added (NH 4 ) 3 VO 4 1×10 -3 mol, NaHCO 3 1×10 -3 mol; in step 2, the calcination temperature is 400°C, and the calcination time is 7.5h.
[0044] The X-ray test, scanning electron microscope test, selected area electron diffraction and electrochemical performance test of the button cell were carried out on the three-dimensional network structure copper-doped vanadate electrode material. The X-ray test showed that the prepared product was Cu-doped NaVO 3 , Scanning electron microscope test shows that the obtained product is granular, and interconnected, interlaced to form a three-dimensional network structure, from the selected area electron diffraction (SAED) pattern, it can be clearly seen that the synthesized sample is a single crystal structure.
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