Preparation method of iron-phosphorus oxynitride applied to zinc-air battery and fuel battery

A technology for fuel cells and zinc-air batteries, applied in iron compounds, nitrogen compounds, battery electrodes, etc., can solve problems such as unstable performance, accelerate the promotion and application of fuel cells and zinc-air batteries, and expensive Pt catalysts. Low, conducive to large-scale development and utilization, excellent oxygen reduction activity effect

Inactive Publication Date: 2018-08-28
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Combined with the current research status of Fe-based catalysts and non-metallic catalysts, how to give full play to the synergistic effect of transition metals and heteroatom elements in electrocatalysis, put forward the idea of ​​Fe doping with P, N, O, through the doping of heteroatoms To affect the electron arrangement of Fe and C in the catalyst to improve the catalytic performance of the catalytic ORR reaction, at the same time reduce the cost of the catalyst, overcome the problems of expensive Pt catalyst and unstable performance, so that it can be applied to fuel cells and zinc-air batteries to reduce The cost of the catalyst has important practical significance to accelerate the promotion and application of fuel cells and zinc-air batteries

Method used

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  • Preparation method of iron-phosphorus oxynitride applied to zinc-air battery and fuel battery
  • Preparation method of iron-phosphorus oxynitride applied to zinc-air battery and fuel battery
  • Preparation method of iron-phosphorus oxynitride applied to zinc-air battery and fuel battery

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Effect test

Embodiment 1

[0034] Step 1: At room temperature, add 0.25g of ferric acetate to quantitative phytic acid and ultrasonically dissolve all the metal salts; then add excess acetone to the solution to produce metal colloid precipitation, finally pour out the solvent, and wash the metal colloid with acetone repeatedly for 3 times . In the second step, the metal glue obtained in the first step was transferred to the porcelain boat of the tube furnace, and the temperature was raised to 800°C in an argon atmosphere, then kept at a constant temperature for 2 hours, and finally cooled down to room temperature naturally. The third step is to fully grind the sample obtained in the previous step, transfer it to a single-necked flask, add excess hydrochloric acid, then sonicate until uniform, and then reflux for 24 hours. The solid was isolated by suction filtration and washed with a large amount of deionized water until neutral, and the solid was vacuum-dried at 80° C. for several hours. The fourth st...

Embodiment 2

[0041] The first step, at room temperature, add 0.1g of ferric acetate to quantitative phytic acid and ultrasonically dissolve all the metal salts; then add excess acetone to the solution to produce metal colloid precipitation, finally pour out the solvent, and wash the metal colloid with acetone repeatedly for 3 times . In the second step, the metal glue obtained in the first step was transferred to the porcelain boat of the tube furnace, and the temperature was raised to 700°C in an argon atmosphere, then kept at a constant temperature for 2 hours, and finally cooled down to room temperature naturally. The third step is to fully grind the sample obtained in the previous step, transfer it to a single-necked flask, add excess hydrochloric acid, then sonicate until uniform, and then reflux for 20 hours. The solid was isolated by suction filtration and washed with a large amount of deionized water until neutral, and the solid was vacuum-dried at 80° C. for several hours. The fi...

Embodiment 3

[0043] The first step, at room temperature, add 0.1g of ferric acetate to quantitative phytic acid and ultrasonically dissolve all the metal salts; then add excess acetone to the solution to produce metal colloid precipitation, finally pour out the solvent, and wash the metal colloid with acetone repeatedly for 3 times . In the second step, the metal glue obtained in the first step is transferred to the porcelain boat of the tube furnace, and the temperature is raised to 1000°C in an argon atmosphere, then kept at a constant temperature for 2 hours, and finally cooled down to room temperature naturally. The third step is to transfer the obtained solid to the porcelain boat in the tube furnace, raise the temperature to 1000°C at 5°C / min under an argon atmosphere, then pass through ammonia gas, keep the constant temperature for several hours, finally turn off the ammonia gas and The argon gas was adjusted back to the original flow rate, and the iron phosphorus oxynitride was obt...

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Abstract

The invention discloses a preparation method of iron-phosphorus oxynitride applied to a zinc-air battery and a fuel battery. The method comprises the following specific steps that firstly, metal glueformed by coordinating transition metal with phytic acid is synthesized, the metal glue of the transition metal is used as a precursor and subjected to high-temperature calcination under the inert atmosphere, the calcinated product is subjected to acid pickling treatment, finally, ammonia is used as an N source, N doping is conducted at the high temperature, and final transition metal phosphorus oxynitride is obtained. Transition metal phosphorus oxynitride is used as an oxygen reduction catalyst and has high electrical conductivity and specific surface area, the overpotential of ORR is effectively lowered, and it is expressed through a rotating disk electrode (RDE) and a rotating ring disk electrode (RRDE) that the ORR process is a four-electronic catalytic mechanism and is an ideal ORR process. According to the electrocatalyst, the transition metal and heteroatom elements sufficiently have the synergistic effect in electrocatalysis, and the electrocatalyst shows excellent catalytic performance in application of the zinc-air battery.

Description

technical field [0001] The invention belongs to the field of new energy material technology and electrochemical catalysis, and specifically relates to a preparation method of iron phosphorus oxynitride applied to zinc-air batteries and fuel cells. Background technique [0002] With the world's increasing demand for energy and increasingly serious environmental problems, we urgently need an efficient, low-cost and environmentally friendly energy conversion and storage system. Fuel cells and fuel cells have attracted the attention of researchers due to their high energy conversion efficiency, environmental friendliness and freedom from Carnot cycle limitations. However, the application of fuel cells and zinc-air batteries still faces severe challenges, especially the slow kinetics of the cathode oxygen reduction reaction (ORR), which greatly limits the commercial application of fuel cells. At present, the best catalyst for ORR is Pt-based catalysts, but Pt reserves are small,...

Claims

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Application Information

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IPC IPC(8): C01G49/00C01B32/05H01M4/90
CPCH01M4/90C01B21/097C01P2004/04C01P2004/03C01P2002/85C01P2006/40C01P2004/80Y02E60/50
Inventor 刘希恩李平
Owner QINGDAO UNIV OF SCI & TECH
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