Nanometer prussian blue sodium ion battery positive electrode material and preparation method thereof
A technology for sodium ion batteries and cathode materials, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of low coulombic efficiency and poor cycle stability, and achieve high coulombic efficiency, stable voltage platform, and complete crystal form.
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Embodiment 1
[0031] Weigh 0.4g polyvinylpyrrolidone ((C 6 h 9 NO) n ), 0.2g sodium dodecylbenzenesulfonate (C 18 h 29 NaO 3 S), 0.798g vitamin C (C 6 h 8 o 6 ) was added to 160mL deionized water, stirred to dissolve it, and obtained a transparent solution;
[0032] Weigh 0.484g sodium ferrocyanide (Na 4 Fe(CN)6 10H 2 O) be dissolved in above-mentioned solution, stir to make it dissolve, obtain sodium ferrocyanide aqueous solution;
[0033] Add 180mL of acetone and 30mL of acetic acid to the above mixed solution, stir and mix thoroughly to obtain a uniform salt solution;
[0034] The mixed solution was stirred at 400r / min at 80°C for 22h, then washed twice with water and once with ethanol, and washed with water and ethanol alternately until all organic matter was completely removed, and dried in vacuum at 100°C for 24h to obtain the sodium Ion battery electrode material Na 7.01 Fe[Fe(CN) 6 ] 2.49 1.28H 2 O's light blue powder.
[0035] The nanometer Prussian blue sodium ion ...
Embodiment 2
[0039] Weigh 0.4g of polyvinylpyrrolidone, 0.2g of sodium dodecylbenzenesulfonate, and 0.798g of vitamin C into 140mL of deionized water, stir to dissolve, and obtain a transparent solution;
[0040] Weigh 0.484g sodium ferrocyanide (Na 4 Fe(CN) 6 10H 2 O) be dissolved in above-mentioned solution, stir to make it dissolve, obtain sodium ferrocyanide aqueous solution;
[0041] Add 160mL ethanol and 30mL acetic acid to the above mixed solution, stir and mix thoroughly to obtain a uniform salt solution;
[0042] The mixed solution was stirred at 300r / min at 60°C for 20h, then washed twice with water and once with ethanol, and washed with water and ethanol alternately until all organic matter was completely removed, and dried in vacuum at 90°C for 20h to obtain the sodium Ion battery electrode material Na 6.98 Fe[Fe(CN) 6 ] 2.46 1.26H 2 O's light blue powder.
[0043] The nanometer Prussian blue sodium ion battery cathode material prepared by the present embodiment was tes...
Embodiment 3
[0047] Weigh 0.2g of polyvinylpyrrolidone, 0.2g of sodium dodecylbenzenesulfonate, and 0.798g of vitamin C into 140mL of deionized water, stir to dissolve, and obtain a transparent solution;
[0048] Weigh 0.363g sodium ferrocyanide (Na 4 Fe(CN) 6 10H 2 O) be dissolved in above-mentioned solution, stir to make it dissolve, obtain sodium ferrocyanide aqueous solution;
[0049] Add 140mL of acetic acid to the above mixed solution, stir and mix thoroughly to obtain a uniform salt solution;
[0050] The mixed solution was stirred at 600r / min at 85°C for 24h, then washed twice with water and once with ethanol, and washed with water and ethanol alternately until all organic matter was completely removed, and dried in vacuum at 85°C for 30h to obtain the sodium Ion battery electrode material Na 7.04 Fe[Fe(CN) 6 ] 2.48 1.32H 2 O's light blue powder.
[0051] The nanometer Prussian blue sodium ion battery cathode material prepared by the present embodiment was tested, and the r...
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