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Preparation method for sulfur-doped carbon oxygen reduction electrocatalyst

An electrocatalyst and sulfur doping technology, which is applied to circuits, electrical components, battery electrodes, etc., can solve the problems of difficulty in recycling waste lithium thionyl chloride batteries, cumbersome reaction steps, and high equipment requirements, and achieves good catalytic effect and preparation method. Simple, low production cost effect

Active Publication Date: 2017-05-10
GUANGXI UNIV
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Problems solved by technology

[0005] The present invention aims to solve the current problem of difficult recovery of waste lithium thionyl chloride batteries and the problems of high equipment requirements, long reaction time, extremely poisonous raw materials, In view of the problems of cumbersome reaction steps, low yield, and high cost, a method for preparing a sulfur-doped carbon-oxygen reduction electrocatalyst was invented. The sulfur-doped carbon-oxygen reduction catalyst was prepared by using the discharged lithium thionyl chloride battery, which is simple and easy to implement. Can be mass-produced, economical and environmentally friendly

Method used

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  • Preparation method for sulfur-doped carbon oxygen reduction electrocatalyst
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  • Preparation method for sulfur-doped carbon oxygen reduction electrocatalyst

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Embodiment 1

[0027] A preparation method of sulfur-doped carbon-oxygen reduction electrocatalyst, the operation steps are as follows:

[0028] (1) Disassemble the waste lithium thionyl chloride battery (ER14250), and collect the sulfur / carbon black mixture in the battery after discharge;

[0029] (2) keeping the sulfur / carbon black mixture obtained in step (1) at a temperature of 800° C. for heat treatment for 30 minutes in nitrogen, and cooling;

[0030] (3) adding 1 g of the obtained sulfur / carbon black mixture after cooling in the step (2) into 100 ml concentration is 1mol / L hydrochloric acid solution and stirred for 6 hours, then filtered, and the filter residue was washed with deionized water until the deionized water flowing out was neutral , dry the filter residue until the water content is less than 5wt%, and collect the obtained sample, which is the sulfur-doped carbon-oxygen reduction electrocatalyst.

Embodiment 2

[0032] A preparation method of sulfur-doped carbon-oxygen reduction electrocatalyst, the operation steps are as follows:

[0033] (1) Disassemble the waste lithium thionyl chloride battery (ER14250), and collect the sulfur / carbon black mixture in the battery after discharge;

[0034] (2) keep the sulfur / carbon black mixture obtained in the step (1) at a temperature of 500° C. for heat treatment for 150 minutes in nitrogen, and cool;

[0035] (3) Gained adding concentration after cooling in step (2) is to stir in 5mol / L10ml sulfuric acid solution for 2 hours, then filter, clean the filter residue with deionized water until the effluent is neutral, and the gained filter residue is dried to moisture less than 5wt%, Collect the sulfur-doped carbon-oxygen reduction electrocatalyst.

Embodiment 3

[0037] A preparation method of sulfur-doped carbon-oxygen reduction electrocatalyst, the operation steps are as follows:

[0038] (1) Disassemble the waste lithium thionyl chloride battery (ER14250), and collect the sulfur / carbon black mixture in the battery after discharge;

[0039] (2) keep the sulfur / carbon black mixture obtained in the step (1) at a temperature of 1100° C. for heat treatment for 10 minutes in hydrogen, and cool;

[0040] (3) Add the nitric acid solution and hydrofluoric acid mixed acid solution (the nitric acid solution of 3mol / L and the 3mol / L hydrofluoric acid solution volume ratio 1:1 mixing) that the concentration obtained after cooling in step (2) is 3mol / L1000ml Stir for 10 hours, then filter, wash the filter residue with deionized water until the effluent is neutral, dry the obtained filter residue until the water content is less than 5wt%, and collect the sulfur-doped carbon-oxygen reduction electrocatalyst.

[0041] Carry out X-ray diffraction, s...

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Abstract

The invention discloses a preparation method for a sulfur-doped carbon oxygen reduction electrocatalyst. The preparation method comprises the steps of (1) detaching waste lithium thionyl chloride batteries, and collecting a sulfur / carbon black mixture from discharged batteries; (2) performing heat treatment in an inert gas at a temperature of 500-1,100 DEG C for 10-150min, and cooling; and (3) adding an acid solution and stirring for 2-10h, then filtering, cleaning filtering residue by clean water until effluent liquid is neutral, drying the filtering residue until water content is less than 5wt%, and collecting the dried filtering residue. The sulfur-doped carbon oxygen reduction electrocatalyst obtained by the preparation method is good in catalysis effect; the preparation method is simple, and batch production can be realized easily; by recycling waste, the production cost is greatly lowered while the problems of difficulty in recycling the waste lithium thionyl chloride batteries and caused environment pollution are effectively solved; the preparation method is simple and easy to implement, economical and environmentally friendly, capable of realizing large-scale production easily, wide in application prospect, and high in economic benefit and social environment protection value.

Description

technical field [0001] The invention relates to a preparation method of an electrocatalyst, in particular to a preparation method of a sulfur-doped carbon-oxygen reduction electrocatalyst. Background technique [0002] Fuel cells have the advantages of environmental friendliness, low operating temperature and high energy conversion rate, and are considered to be the ultimate energy source for human beings [Chem.Rev.2004, 104, 4245; New Materials Industry, 2015, 4, 58]. However, the high overpotential and slow reaction kinetics of the cathode oxygen reduction reaction restrict the large-scale commercial application of fuel cells. Platinum catalyst is currently the best catalyst for oxygen reduction reaction, but platinum catalyst is expensive, vulnerable to carbon monoxide poisoning and scarcity of platinum resources [J.PowerSources, 2006, 156, 171; Electrochim.Acta, 2011, 56, 9186]. The development of low-cost non-precious metal catalysts to replace platinum catalysts is an...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M10/54
CPCH01M4/9083H01M10/54Y02E60/50Y02W30/84
Inventor 朱金良马少健沈培康张伶俐张颖朦潘智毅
Owner GUANGXI UNIV
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