An olivine type NaFePO 4 Preparation method of sodium ion battery cathode material
A sodium-ion battery, olivine-type technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve problems such as the inability to meet the requirements of industrial application of sodium-ion batteries, achieve excellent electrochemical performance, rich raw material sources, Simple preparation method
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Embodiment 1
[0032] Amorphous Nano FePO 4 Mix with conductive agent (graphite (produced in Shanghai, AR): carbon black (produced in Shanghai, AR) = 4:6) according to the mass ratio of 62:30 and add to the ball mill jar, dry mill for two hours with a planetary ball mill, and then use alcohol Wet milled as a dispersant for two hours, and the obtained active substance was dried in a constant temperature drying oven. Weigh 15 mg of active material and mix it with PTFE (made in Japan, battery grade) (mass ratio 92:8) to form a slurry, and apply it on the positive shell of the 2016 button battery welded with stainless steel mesh. After compaction, put it in a vacuum drying oven, bake at 100°C for 12 hours, and then fill it with Ar 2 In the glove box, the metal Na (produced in Shanghai, CP) sheet is used as the negative electrode, and the electrolyte is 1mol / L NaClO 4 (produced in Shanghai, AR) (dissolved in EC (produced in Tianjin, AR) / DMC (produced in Shanghai, AR) with a volume ratio of 1:1)...
Embodiment 2
[0047] The present embodiment olivine type NaFePO 4 The preparation method of sodium ion battery cathode material specifically comprises the following steps:
[0048] (1) Amorphous nano-FePO 4 Add the conductive agent to the ball milling tank, mill for 2 hours, then add ethanol as a dispersant to the ball milling tank, continue ball milling for 2 hours, and dry to obtain the active substance;
[0049] (2) Weigh the active material prepared in step (1), mix it with the binder, stir thoroughly to make a slurry, and coat it on the positive electrode shell of the button battery, hold the pressure for 3min under the pressure of 3MP, and fully compact it , and vacuum-dried at 100°C for 12 hours to obtain a button battery positive shell loaded with electrode materials;
[0050] (3) In a glove box filled with argon gas, the sodium sheet is used as the negative electrode, and the positive electrode shell of the button battery loaded with the electrode material is used as the positive...
Embodiment 3
[0058] The present embodiment olivine type NaFePO 4 The preparation method of sodium ion battery cathode material specifically comprises the following steps:
[0059] (1) Amorphous nano-FePO 4 Add the conductive agent to the ball milling tank, mill for 4 hours, then add ethanol as a dispersant to the ball milling tank, continue ball milling for 4 hours, and dry to obtain the active substance;
[0060] (2) Weigh the active material prepared in step (1), mix it with the binder, stir thoroughly to make a slurry, and coat it on the positive electrode shell of the button battery, hold the pressure for 4min under the pressure of 3MP, and fully compact it , and vacuum-dried at 110°C for 10 hours to obtain a button battery positive shell loaded with electrode materials;
[0061] (3) In a glove box filled with argon gas, the sodium sheet is used as the negative electrode, and the positive electrode shell of the button battery loaded with the electrode material is used as the positive...
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Abstract
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