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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  • Abstract
  • Description
  • Claims
  • Application Information

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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,

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

Examples

Experimental program
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Example Embodiment

[0026] Example 1

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

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

[0029] (2) Heat the sulfur / carbon black mixture obtained in step (1) at 800°C for 30 minutes in nitrogen, and then cool;

[0030] (3) Add 1g of the sulfur / carbon black mixture obtained after cooling in step (2) to 100ml of 1mol / L hydrochloric acid solution and stir for 6 hours, then filter, take the filter residue and wash with deionized water until the outflow of deionized water is neutral , Dry the filter residue until the moisture content is less than 5wt%, and collect the sample, which is the sulfur-doped carbon oxygen reduction electrocatalyst.

Example Embodiment

[0031] Example 2

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

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

[0034] (2) The sulfur / carbon black mixture obtained in step (1) is heat-treated at 500°C for 150 minutes in nitrogen and cooled;

[0035] (3) After cooling in step (2), add 10ml sulfuric acid solution with a concentration of 5mol / L and stir for 2 hours, then filter, wash the filter residue with deionized water until the effluent is neutral, and dry the filter residue until the moisture is less than 5wt%. Collect and obtain sulfur-doped carbon-oxygen reduction electrocatalyst.

Example Embodiment

[0036] Example 3

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

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

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

[0040] (3) After cooling in step (2), add a nitric acid solution with a concentration of 3mol / L1000ml and a hydrofluoric acid mixed acid solution (3mol / L nitric acid solution and 3mol / L hydrofluoric acid solution are mixed in a volume ratio of 1:1) Stir in medium for 10 hours, then filter, wash the filter residue with deionized water until the effluent is neutral, and the obtained filter residue is dried until the moisture is less than 5wt%, and collected to obtain the sulfur-doped carbon oxygen reduction electrocatalyst.

[0041] The sample prepared in Example 1...

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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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