Olivine type NaFePO4 sodium ion battery positive electrode material preparation method
A sodium-ion battery, olivine-type technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve problems that cannot meet the requirements of industrial application of sodium-ion batteries, and achieve excellent electrochemical performance and high electrochemical activity , the effect of rich sources of raw materials
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Embodiment 1
[0032] Amorphous Nano FePO 4 Mix with conductive agent (graphite (made in Shanghai, AR): carbon black (made in Shanghai, AR) = 4:6) in a mass ratio of 62:30 and add it to the ball mill tank, dry it in a planetary ball mill for two hours, and then use alcohol Wet grinding for two hours as a dispersant, and the resulting active substance was dried in a constant temperature drying oven. 15 mg of active material was weighed and mixed with PTFE (made in Japan, battery grade) (mass ratio 92:8) to form a slurry, which was coated on the positive shell of a 2016 type button battery welded with a stainless steel mesh. After compaction, it was placed in a vacuum drying oven, dried at 100 °C for 12 h, and then filled with Ar. 2 In the glove box, metal Na (produced in Shanghai, CP) was used as the negative electrode, and the electrolyte was 1 mol / L NaClO. 4 (made in Shanghai, AR) (dissolved in EC (made in Tianjin, AR) / DMC (made in Shanghai, AR) with a volume ratio of 1:1), using glass ma...
Embodiment 2
[0047] Olivine type NaFePO in this example 4 The preparation method of the positive electrode material of the sodium ion battery specifically comprises the following steps:
[0048] (1) The amorphous nano FePO 4 Add the conductive agent into the ball mill tank, and mill it for 2 hours, then add ethanol to the ball mill tank as a dispersant, continue the ball mill for 2 hours, and dry to obtain the active substance;
[0049] (2) Weigh the active material obtained in step (1), mix it with a binder, stir well, make a slurry, and coat it on the positive shell of the button battery, hold the pressure for 3 minutes under the pressure of 3MP, and fully compact it , and vacuum-dried at 100 °C for 12 h to obtain a positive case of a button battery loaded with electrode materials;
[0050] (3) In a glove box filled with argon gas, the sodium sheet is used as the negative electrode, the positive electrode shell of the button battery loaded with the electrode material is the positive el...
Embodiment 3
[0058] Olivine type NaFePO in this example 4 The preparation method of the positive electrode material of the sodium ion battery specifically comprises the following steps:
[0059] (1) The amorphous nano FePO 4 Add the conductive agent into the ball mill jar, ball mill for 4 hours, then add ethanol to the ball mill jar as a dispersant, continue ball milling for 4 hours, and dry to obtain the active substance;
[0060] (2) Weigh the active material obtained in step (1), mix it with a binder, stir well to make a slurry, and coat it on the positive shell of the button battery, keep the pressure for 4 minutes under the pressure of 3MP, and fully compact it , and vacuum-dried at 110 °C for 10 h to obtain a positive electrode shell of a button battery loaded with electrode materials;
[0061] (3) In a glove box filled with argon gas, the sodium sheet is used as the negative electrode, the positive electrode shell of the button battery loaded with the electrode material is the pos...
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