Sodium manganese fluosilicate positive electrode material for sodium ion battery and preparation method for sodium manganese fluosilicate positive electrode material
A sodium-ion battery and positive electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of short cycle life, only reversible capacity, and low capacity of positive electrode materials, achieve high energy density, improve stability and Cycle life and wide application prospects
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Embodiment 1
[0026] A method for preparing a sodium manganese fluorosilicate positive electrode material for a sodium ion battery, comprising the steps of: accurately weighing 0.2 mol of sodium bicarbonate, 0.002 mol of magnesium hydroxide, 0.098 mol of manganese oxalate, and 0.1 mol of tetraethyl orthosilicate , 0.1mol sodium fluoride, 106g sucrose, add appropriate amount of deionized water, ball mill into a rheological state with a ball mill, then put it into a stainless steel tank lined with polytetrafluoroethylene, keep it warm at 250°C for 6 days, take out the rheological mixture, Dry and sinter at 750°C for 8 hours in an inert atmosphere to obtain the anode material Na 3 Mg 0.02 mn 0.98 SiO 4 F.
[0027] figure 1 For the sodium ion battery cathode material Na that embodiment 1 synthesizes 3 Mg 0.02 mn 0.98 SiO 4 SEM image of F.
[0028] Performance test: the prepared sodium ion battery cathode material Na 3 Mg 0.02 mn 0.98 SiO 4 Mix F with acetylene black and polytetrafl...
Embodiment 2
[0030] A method for preparing a sodium manganese fluorosilicate positive electrode material for a sodium ion battery, comprising the steps of: accurately weighing 0.1mol sodium oxalate, 0.005mol ferrous oxalate, 0.095mol manganese oxalate, 0.1mol tetraethyl orthosilicate, 0.1mol sodium fluoride, 80g polyethylene glycol, add appropriate amount of deionized water, ball mill into a rheological state with a ball mill, then put it into a stainless steel tank lined with polytetrafluoroethylene, keep it warm at 300°C for 3 days, and make the rheological mixture Take it out, dry it, and sinter it at 700 ° C for 10 hours in an inert atmosphere to obtain the positive electrode material Na 3 Fe 0.05 mn 0.95 SiO 4 F.
[0031] Performance test: the prepared sodium ion battery cathode material Na 3 Fe 0.05 mn 0.95 SiO 4 Mix F with acetylene black and polytetrafluoroethylene at a mass ratio of about 85:10:5, press it into a film with a thickness of about 1mm with a film laminator, dry...
Embodiment 3
[0034] A method for preparing a sodium manganese fluorosilicate positive electrode material for a sodium ion battery, comprising the steps of: accurately weighing 0.1 mol of sodium carbonate, 0.001 mol of zinc oxide, 0.099 mol of manganese citrate, 0.1 mol of tetraethyl orthosilicate, 0.1mol sodium fluoride, 92g citric acid, add appropriate amount of deionized water, ball mill into a rheological state with a ball mill, then put it into a stainless steel tank lined with polytetrafluoroethylene, keep it warm at 200°C for 7 days, take out the rheological mixture, Dry and sinter at 800°C for 6 hours in an inert atmosphere to obtain the anode material Na 3 Zn 0.01 mn 0.99 SiO 4 F.
[0035] Performance test: the prepared sodium ion battery cathode material Na 3 Zn 0.01 mn 0.99 SiO 4 Mix F with acetylene black and polytetrafluoroethylene at a mass ratio of about 85:10:5, press it into a film with a thickness of about 1mm with a film laminator, dry it fully in an oven at 120°C,...
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