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Low-cost vanadium-titanium-manganese alloy for fuel battery hydrogen storage and preparation method thereof

A fuel cell and manganese alloy technology, applied in the field of hydrogen storage materials, can solve the problems of high production cost and insufficient hydrogen storage capacity to meet the needs of fuel cells, and achieve the effects of reduced production cost, excellent mechanical strength, and low hydrogen embrittlement

Inactive Publication Date: 2018-10-23
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects that the existing vanadium-titanium alloy hydrogen storage materials have high preparation costs and insufficient hydrogen storage capacity to meet the needs of fuel cells, the present invention provides a low-cost vanadium-titanium-manganese alloy for hydrogen storage in fuel cells and its preparation method. The prepared vanadium Titanium-manganese alloy hydrogen storage material The hydrogen storage alloy material has excellent hydrogen adsorption and desorption capabilities, and at the same time, the preparation cost is low, and it is suitable for large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Use industrial-grade vanadium pentoxide containing 0.1% iron and 1.2% carbon as raw material, wash with alcohol, acetone, deionized water, and filter to obtain clean vanadium pentoxide raw material, and then mix with titanium oxide, Manganese oxide raw materials are mechanically mixed, and the molar ratio of vanadium, titanium and manganese is 0.3:0.65:0.05 to obtain mixed raw material powder;

[0036] (2) Dissolve the mixed raw material powder in a mixed solution of dilute hydrochloric acid and dilute nitric acid heated in a water bath, and stir for 40 minutes at a stirring speed of 120 rpm. Slowly add concentrated ammonia water with a concentration of 12% until no more precipitation occurs, after filtration, the filter residue is washed and dried to obtain a hydroxide precipitate with a grain size of 50 nanometers;

[0037] (3) Mix the hydroxide precipitate and carbon powder evenly, wherein the molar ratio of the hydroxide precipitate to the carbon powder is 1:1, ...

Embodiment 2

[0041] (1) Use industrial-grade vanadium pentoxide containing 0.2% iron and 1.0% carbon as raw material, wash with alcohol, acetone, deionized water, and filter to obtain clean vanadium pentoxide raw material, and then mix with titanium oxide, Manganese oxide raw materials are mechanically mixed, and the molar ratio of vanadium, titanium and manganese is 0.5:0.35:0.05 to obtain mixed raw material powder;

[0042] (2) Dissolve the mixed raw material powder in a mixed solution of dilute hydrochloric acid and dilute nitric acid heated in a water bath, and stir for 20 minutes at a stirring speed of 60 rpm. Slowly add concentrated ammonia water with a concentration of 17% until no more precipitation occurs, after filtration, the filter residue is washed and dried to obtain a hydroxide precipitate with a grain size of 20 nanometers;

[0043] (3) Mix the hydroxide precipitate and carbon powder evenly, wherein the molar ratio of the hydroxide precipitate to the carbon powder is 1:1.1,...

Embodiment 3

[0047] (1) Use industrial-grade vanadium pentoxide containing 0.18% iron and 1.2% carbon as raw material, wash with alcohol, acetone, deionized water, and filter to obtain clean vanadium pentoxide raw material, and then mix with titanium oxide, Manganese oxide raw materials are mechanically mixed, and the molar ratio of vanadium, titanium and manganese is 0.55:0.25:0.2 to obtain mixed raw material powder;

[0048] (2) Dissolve the mixed raw material powder in a mixed solution of dilute hydrochloric acid and dilute nitric acid heated in a water bath, and stir for 35 minutes at a stirring speed of 320 rpm. Slowly add concentrated ammonia water with a concentration of 17% until no more precipitation occurs, and after filtration, the filter residue is washed and dried to obtain a hydroxide precipitate with a grain size of 45 nanometers;

[0049] (3) Mix the hydroxide precipitate and carbon powder evenly, wherein the molar ratio of the hydroxide precipitate to the carbon powder is ...

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PUM

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Abstract

The invention provides a low-cost vanadium-titanium-manganese alloy for fuel battery hydrogen storage and a preparation method thereof. Industrial-grade vanadium pentoxide serves as a raw material, ismixed with titanium oxide and manganese oxide and then is dissolved in an acid liquor mixed solution heated in a water bath, and after a full reaction is completed, undissolved substances react withstronge ammonia water till no precipitate is generated any more, filter residues are washed and dried to be evenly mixed with carbon powder after filtering is carried out, shock cooling is carried outafter thermal treatment is carried out at high temperature, finally carbon deposits on the surface are removed in a physical means, and thus a vanadium-titanium-manganese alloy hydrogen storage material is obtained. As the industrial-grade vanadium pentoxide is adopted as the raw material, the prepared alloy hydrogen storage raw material is low in cost, a hydrogen desorption platform of the alloyis improved and the hydrogen desorption amount is increased due to introduction of iron impurities and manganese impurities, the mechanical strength of the alloy is improved due to introduction of the carbon impurities, and the defects that a vanadium-titanium alloy hydrogen storage material is high in preparation cost and the hydrogen storage capacity is not high enough to meet the requirementsof fuel batteries are overcome, and furthermore, the low-cost vanadium-titanium-manganese alloy for fuel battery hydrogen storage and the preparation method thereof are simple in preparation procedureand suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a low-cost vanadium-titanium-manganese alloy for fuel cell hydrogen storage and a preparation method. Background technique [0002] A fuel cell is a device that converts chemical energy stored in fuel and oxidant into electrical energy. The fuel cell directly converts the chemical energy of the fuel into electrical energy. The energy conversion efficiency is high, the specific energy and specific power are high, and the reaction process can be controlled. The energy conversion process can be carried out continuously, so it is an ideal battery for automobiles. A fuel cell is mainly composed of an anode, an electrolyte and a cathode. The fuel (typically hydrogen) at the anode is oxidized by the catalyst so that the fuel becomes a positively charged ion and negatively transports electrons. Fuel cells only produce water and carbon dioxide during work, especially compared w...

Claims

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Application Information

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IPC IPC(8): C22C27/02C22C32/00C22B5/10C22F1/18
CPCC22B5/10C22C27/025C22C32/0052C22F1/18Y02P10/20
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD