Air electrode catalyst of aluminum-air battery, air electrode and preparation method of air electrode catalyst
A technology of aluminum-air battery and air electrode, which is applied to battery electrodes, fuel cell half-cells, primary battery-type half-cells, circuits, etc., can solve the problem of high manufacturing cost, complicated manufacturing process and low catalytic activity of oxygen reduction catalysts and other issues, to achieve the effects of electron and material transport, high-efficiency catalytic activity, and high catalytic activity.
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[0017] One aspect of the present invention provides an air electrode catalyst for an aluminum-air battery, the chemical formula of which is CoFe 2-x m x o 4 , M is one of Ni, Zn and Mn, 02-x Ni x o 4 、CoFe 2-x Zn x o 4 or CoFe 2-x mn x o 4 , and 02-x Ni x o 4 . This catalyzer can be made by solid-phase reaction method, and concrete preparation method comprises the following steps successively:
[0018] (1) Solid phase mixing
[0019] Weigh the cobalt source, iron source and M source according to the ratio of the chemical formula, and mix them with glucose;
[0020] (2) Grinding, drying and calcining.
[0021] Wherein, the cobalt source is cobalt nitrate, the iron source is ferric nitrate, and the M source is metal M acetate. Nitrate and acetate are chosen because their raw materials are convenient and readily available, and they are thermally decomposed into non-reactive gaseous products. The molar ratio of the total molar weight of the metals of the cobalt sou...
Embodiment 1
[0027] Air Electrode Catalyst CoFe 1.85 Ni 0.15 o 4 The preparation method comprises the following steps in sequence:
[0028] (1) Solid phase mixing
[0029] Take cobalt nitrate, ferric nitrate and nickel acetate according to the proportioning of chemical formula and grind after mixing uniformly, add the glucose that the molar ratio with total metal ion is 3:5 and mix;
[0030] (2) Continue to grind until the mixture becomes viscous, put it into an oven to dry to obtain a precursor, and move it into an atmosphere furnace for calcination at 600°C for 4h.
[0031] The preparation of the air electrode, the steps include: according to the CoFe 1.85 Ni 0.15 o 4 Catalyst, carbon powder, NaHCO 3 The mass ratio with PTFE emulsion is 10:1:1:8 to weigh, and CoFe 1.85Ni 0.15 o 4 Catalyst, carbon powder and NaHCO 3 Disperse evenly with absolute ethanol, add PTFE emulsion with a mass content of 30% and stir to prepare a catalyst slurry; set a waterproof layer on one side of the...
Embodiment 2
[0033] Air Electrode Catalyst CoFe 1.85 Zn 0.15 o 4 The preparation method comprises the following steps in sequence:
[0034] (1) Solid phase mixing
[0035] Take cobalt nitrate, ferric nitrate and nickel acetate according to the proportioning of chemical formula and grind after mixing uniformly, add the glucose that the molar ratio with total metal ion is 3:5 and mix;
[0036] (2) Continue to grind until the mixture becomes viscous, put it into an oven to dry to obtain a precursor, and move it into an atmosphere furnace for calcination at 600°C for 4h.
[0037] The preparation of the air electrode, the steps include: according to the CoFe 1.85 Zn 0.15 o 4 Catalyst, carbon powder, NaHCO 3 The mass ratio with PTFE emulsion is 10:1:1:8 to weigh, and CoFe 1.85 Zn 0.15 o 4 Catalyst, carbon powder and NaHCO 3 Disperse evenly with absolute ethanol, add PTFE emulsion with a mass content of 30% and stir to prepare a catalyst slurry; set a waterproof layer on one side of th...
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