Positive electrode catalyst of flow battery and preparation method and application of positive electrode catalyst

A technology for flow batteries and catalysts, applied in battery electrodes, fuel cells, regenerative fuel cells, etc., can solve the problems of low selectivity and expensive cathode materials, and achieve high catalytic efficiency, low cost and high selectivity. Effect

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of high price and low selectivity of positive electrode materials in membraneless flow batteries in the prior art, the present invention provides a positive electrode catalyst for liquid flow batteries and its preparation method and application

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  • Positive electrode catalyst of flow battery and preparation method and application of positive electrode catalyst

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Embodiment 1

[0056] Positive electrode catalyst: prepare 0.25mol / L Mn(NO 3 ) 2 , 0.25mol / L Cu(NO 3 ) 2 With 1mol / L Co(NO 3 ) 2 0.05L of the mixed solution, add 4g co-precipitant ammonium sulfate (mass concentration is 5%) and 5g stabilizer polyvinyl alcohol (molecular weight is 18000), at a temperature of 180 ℃, time 8h, pH is 10 conditions to prepare the active group Divide the precursor suspension. The specific surface area of ​​17g is 300m 2 / g of carbon nanotubes at a temperature of 450 ° C, NH 3 , gas volume space velocity 5h -1 , contacted for 10h to prepare the modified carbon material. The modified carbon material was placed in the active component precursor suspension, treated with ultrasound at 60°C for 6h, then dried at 120°C for 4h under nitrogen atmosphere, and calcined at 400°C for 5h under nitrogen atmosphere to obtain the positive electrode of the flow battery catalyst.

[0057] Negative electrode catalyst: prepare 1mol / L H 4 PtCl 6 with 1mol / L FeCl 3 Equal vol...

Embodiment 2

[0061] Positive electrode catalyst: prepare 0.5mol / L Mn(NO 3 ) 2 , 0.25mol / L Cu(NO 3 ) 2 With 1mol / L Co(NO 3 ) 2 0.05L of the mixed solution, add 4g co-precipitant ammonium sulfate (mass concentration is 3%) and 5g stabilizer polyvinyl alcohol (molecular weight is 18000), at a temperature of 150 ℃, time 4h, pH is 8 conditions to prepare the active group Divide the precursor suspension. The specific surface area of ​​8g is 300m 2 / g of carbon nanotubes at a temperature of 450 ° C, through H 2 S, gas volume space velocity 5h -1 , contacted for 10h to prepare the modified carbon material. The modified carbon material was placed in the active component precursor suspension, treated with ultrasound at 60°C for 6h, then dried at 120°C for 4h under nitrogen atmosphere, and calcined at 400°C for 5h under nitrogen atmosphere to obtain the positive electrode of the flow battery catalyst.

[0062] Negative electrode catalyst: prepare 1mol / L H 4 PtCl 6 with 1mol / L FeCl 3 Equa...

Embodiment 3

[0066] Positive electrode catalyst: prepare 0.05mol / L Fe 2 (NO 3 ) 3 , 0.5mol / L Mn(NO 3 ) 2 , 0.15mol / L Cu(NO 3 ) 2 With 1mol / L Co(NO 3 ) 2 0.05L of the mixed solution, add 5g co-precipitant ammonium sulfate (mass concentration is 10%) and 5g stabilizer hexadecyltrimethylammonium bromide, at a temperature of 180 ° C, time 12h, pH 12 conditions Active component precursor suspension; 10g specific surface area 300m 2 / g of carbon nanotubes at a temperature of 450 ° C, through H 2 S, gas volume space velocity 5h -1 , and contacted for 10 hours to obtain the modified carbon material; the modified carbon material was placed in the active component precursor suspension, treated with ultrasound at 60°C for 6h, then dried at 120°C for 4h, and calcined at 400°C under a nitrogen atmosphere 5h, the positive electrode catalyst of the liquid flow battery was prepared.

[0067] Negative electrode catalyst: prepare 1mol / L H 4 PtCl 6 with 1mol / L FeCl 3 Equal volume mixed solution...

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Abstract

The invention discloses a flow battery positive electrode catalyst and a preparation method and application thereof. The positive electrode catalyst comprises a carbon material and active components, the active components comprise cobalt and metal M, the cobalt and at least part of the metal M are cobaltate of the metal M, and the metal M is selected from at least one of Mn, Ni, Fe and Cu. The preparation method of the flow battery positive electrode catalyst comprises the following steps: (1) contacting a solution containing a metal M precursor and a cobalt precursor with a coprecipitator and a stabilizer for reaction to prepare an active component precursor suspension; and (2) mixing the active component precursor suspension obtained in the step (1) with a carbon material, drying and roasting to obtain the flow battery positive electrode catalyst. The positive electrode catalyst can selectively catalyze the oxidation reaction of a high-energy compound, does not participate in the reduction reaction, and can significantly improve the efficiency of the membrane-free flow battery compared with the prior art.

Description

technical field [0001] The invention relates to a positive electrode catalyst of a liquid flow battery and a preparation method thereof, belonging to the field of organic liquid flow batteries. Background technique [0002] Driven by the global new energy power generation, electric vehicles and emerging energy storage industries, various types of energy storage technologies have made great progress in recent years. In addition to the already commercially applied pumped storage and cavernous compressed air energy storage technologies, flow battery technology has also received attention. Flow battery is a kind of high-efficiency energy storage battery, which has the characteristics of high energy density, wide application field (environment), and long cycle life. It is the best choice for current energy storage technology. Flow batteries mainly include inorganic flow batteries and organic flow batteries. Among them, organic flow batteries have the characteristics of high ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M8/18
CPCH01M4/9041H01M4/96H01M4/8825H01M4/8882H01M8/188
Inventor 童凤丫孙清王昊张涛田豪缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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