Preparation method for V-Ti-based hydrogen storage alloy
A hydrogen storage alloy, v-ti technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problem of high impurity content, achieve the effect of low impurity content, speed up the reaction rate, and increase the solid-liquid contact area
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[0026] The preparation method of V-Ti base hydrogen storage alloy of the present invention comprises:
[0027] A. Mix vanadium oxides, titanium oxides, binders and additives evenly, press them into shape with a press, and sinter at high temperature to make a solid cathode;
[0028] B. Under the protection of argon, carry out molten salt electrolysis reaction;
[0029] C. Clean and dry the cathode product after electrolysis, and carry out remelting, refining and proper composition adjustment under vacuum conditions;
[0030] D, out of the furnace to obtain a V-Ti-based hydrogen storage alloy.
[0031] Wherein, the vanadium oxide described in step A is V 2 o 3 powder, the titanium oxide is a kind of high titanium slag or titanium dioxide, and the additive is H 2 TiO 3 , CaCl 2 , V 2 o 5 The addition of additives is mainly to increase the porosity of the solid-state cathode, thereby increasing the solid-liquid contact area between the cathode and the molten salt. After c...
Embodiment 1
[0036] Example 1: Mix vanadium trioxide and titanium dioxide below 200 mesh at a mass ratio of 1:1 to obtain a mixed material, and add the additive CaCl to the mixed material 2 and binder polyvinyl alcohol (0.03g / ml), CaCl 2 The dosage of the additive is 5wt% of the total amount of the mixed material, and the dosage of the binder is 5ml per 100g of the mixed material. The mixed material with additives and binders was pressed and molded at 30 MPa, and fired at 1000° C. for 4 hours in a CO atmosphere to obtain a reactive cathode. Under Ar gas atmosphere, with CaCl 2 The molten salt is used as the electrolyte, the graphite block is used as the anode, and the cathode is subjected to reduction electrolysis, the electrolysis temperature is 950°C, the voltage is 3.0V, and the time is 10h. After the electrolysis, the cathode block was cooled to room temperature under an Ar gas atmosphere, and the V-Ti master alloy was obtained after cleaning. Determined by chemical analysis, the ob...
Embodiment 2
[0047] Example 2: Mix vanadium trioxide and titanium dioxide below 200 meshes at a mass ratio of 1:1.1 to obtain a mixed material, and add additive H to the mixed material 2 TiO 3 and binder polyvinyl alcohol (0.03g / ml), H 2 TiO 3 The dosage of the additive is 10wt% of the total amount of the mixed material, and the dosage of the binder is 3ml per 100g of the mixed material. The mixed material was press-molded at 30 MPa, and fired at 1000° C. for 4 hours in a CO atmosphere to obtain a reaction cathode. Under Ar gas atmosphere, with 80wt% CaCl 2 -20wt% NaCl molten salt is used as the electrolyte, graphite block is used as the anode, and the cathode is subjected to reduction electrolysis, the electrolysis temperature is 900°C, the voltage is 3.0V, and the time is 10h. After the electrolysis, the cathode block was cooled to room temperature under an Ar gas atmosphere, and the V-Ti master alloy was obtained after cleaning. Determined by chemical analysis, the obtained master ...
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