A direct carbon fuel cell anode with dual electrocatalytic functions

A dual electrocatalysis, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems affecting battery performance and life, corrode electrolytes, etc., to prolong battery life, increase electrode reaction active sites, and extend three Effect of Phase Interface Length

Active Publication Date: 2019-02-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to improve the problem that the existing hybrid direct carbon fuel cell will corrode the electrolyte, thereby affecting the performance and life of the battery, and provide a direct carbon fuel cell anode material with dual electrocatalytic functions

Method used

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  • A direct carbon fuel cell anode with dual electrocatalytic functions
  • A direct carbon fuel cell anode with dual electrocatalytic functions
  • A direct carbon fuel cell anode with dual electrocatalytic functions

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Experimental program
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Effect test

Embodiment 1

[0032] Dissolve 2.6504g of cerium nitrate, 0.7530g of manganese nitrate, and 0.404g of ferric nitrate in deionized water, then add 10g of glycine and 10g of citric acid to the solution, place in a water bath at 80°C and evaporate to dryness for 12h to a gel state, and then place Burn at 250°C to get the precursor; roast the precursor at 1000°C for 6h to get manganese and iron co-doped CeO 2 Structural skeleton Ce of composite oxide 0.6 mn 0.3 Fe 0.1 o 2 (CMF). XRD analysis shows that the prepared composite oxide completely corresponds to the standard peak of cerium oxide (such as figure 2 shown), indicating that manganese and iron were co-doped into the cerium oxide lattice. The CMF-NiO anode material with double electrocatalytic activity was prepared by mechanical mixing method with CMF and nickel oxide according to the mass fraction of 50% and 50%. The prepared composite anode material was screen-printed on the surface of the electrolyte and assembled into a SO-DCFC. ...

Embodiment 2

[0034] Dissolve 1.35g PVP in 7.5ml DMF solvent and stir at room temperature for 4h until completely dissolved. Then, 0.4997g of cerium nitrate and 0.1003g of samarium oxide were added to the solution, stirred for 12 hours until completely dissolved, and left to stand for 12 hours to obtain a gel. The gel was electrospun to obtain the composite fiber precursor, and the prepared precursor was calcined at 800°C for 2 hours to obtain one-dimensional SDC nanofibers. SEM image (such as Figure 4 ) analysis shows that the prepared nanofibers can still maintain their fiber morphology after calcination, and there are a large number of porous structures, which is conducive to the metal impregnation inside the skeleton. Copper nitrate was impregnated into the SDC porous framework to obtain a Cu@SDC anode material with dual catalytic activity. The prepared composite anode material with a mass ratio of 1:1 was screen-printed on the surface of the electrolyte, assembled into a SO-DCFC, an...

Embodiment 3

[0036] Add 1.737g of cerium nitrate and 0.0937g of gallium oxide into deionized water, react at a high temperature of 200°C for 24h, hydrothermally synthesize the spherical structure of GDC, and obtain spherical GDC powder after roasting in an inert gas atmosphere at 600°C. The Fe@GDC anode material was obtained by combining GDC powder and ferric nitrate at a mass ratio of 3:2 through solid phase composite and calcining at 450 °C. The prepared Fe@GDC composite anode material was screen-printed on the surface of the electrolyte and assembled into SO-DCFC. The solid carbon black was mixed with lithium carbonate, potassium carbonate, and sodium carbonate at a mass ratio of 70%, 15%, 9%, and 6%. After mixing, put it in the anode cavity, and use 10ml / min CO 2 It is the anode carrier gas, 50ml / min oxygen is the oxidant, and the working temperature of the battery is 900°C. When the mass fraction of Fe in the composite anode material is 40%, the maximum output power density of the ba...

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Abstract

The invention relates to a direct carbon fuel cell anode with dual electric catalytic functions, and belongs to the technical field of clean energy. The anode material is prepared by compounding nanoparticle as a conductive phase on the inner and outer parts of transition element-codoped CeO2 as a catalytic active phase of the anode and a porous framework. The prepared anode material has dual electrocatalysis effects on carbon fuel, can be used as an excellent ion conductor, transfers O<2-> generated by a cathode to the electrode surface and increases the electrode reaction active sites; the anode material can be applied to electrochemical oxidation of an intermediate catalytic carbon; and the power output of the cell is improved. The anode material disclosed by the invention is assembled into a direct carbon fuel cell for power generation, so that the three-phase interface length is prolonged; the fuel gasification reaction rate is improved; corrosion of molten carbonate to an electrolyte is avoided; and the lifetime of the cell is prolonged.

Description

technical field [0001] The invention relates to a direct carbon fuel cell anode with dual electrocatalytic functions, belonging to the technical field of clean energy. Background technique [0002] With the rapid development of the economy, problems such as energy crisis and environmental degradation brought about by traditional high consumption and high pollution energy utilization methods have become increasingly prominent. Therefore, the research and establishment of efficient energy utilization mechanisms and clean conversion technology methods have become a hot spot in social science research today. A new type of fuel cell, Direct Carbon Fuel Cell (DCFC), has gradually attracted attention due to its outstanding advantages such as wide source of raw materials, high energy conversion efficiency, good safety, and relatively low pollution. According to the different electrolytes used, direct carbon fuel cells can be divided into three categories: molten hydroxide direct ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8647H01M4/88Y02E60/50
Inventor 乔金硕孙克宁刘佳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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