三維石墨氈陽極自呼吸微流體燃料電池性能數(shù)值模擬
發(fā)布時(shí)間：2018-12-11 02:40
【摘要】：針對采用三維石墨氈可滲透陽極的空氣自呼吸無膜微流體燃料電池,建立了三維等溫穩(wěn)態(tài)數(shù)學(xué)模型,對電池中燃料及電解液的流動和傳輸、電極過程動力學(xué)及電荷傳遞過程進(jìn)行了模擬,計(jì)算獲得了具有石墨氈陽極的微流體燃料電池內(nèi)的傳質(zhì)和燃料滲透特性,研究了石墨氈厚度及反應(yīng)物(燃料和電解液)流量對電池性能的影響。結(jié)果表明:當(dāng)入口流量為333μl·min-1時(shí),采用石墨氈可滲透陽極相比碳紙和碳布可滲透陽極,極限電流密度和極限功率密度分別提升12%和50%;電池電壓為0.8V時(shí)燃料滲透引起的寄生電流密度僅占電流密度的0.86%。電池性能隨著石墨氈電極厚度增加而升高,但增幅逐漸減小;反應(yīng)物流量增大,電池的性能先增加后逐漸趨于穩(wěn)定。
[Abstract]:In this paper, a three-dimensional isothermal steady state mathematical model is established for the air self-breathing membrane free microfluid fuel cell with three dimensional graphite felt permeable anode. The flow and transmission of fuel and electrolyte in the cell are studied. The kinetics of electrode process and charge transfer process were simulated, and the mass transfer and fuel permeation characteristics in microfluid fuel cell with graphite felt anode were calculated. The effects of the thickness of graphite felt and the flow rate of reactants (fuel and electrolyte) on the performance of the battery were studied. The results show that when the inlet flow rate is 333 渭 l min-1, the limit current density and the limit power density of graphite felt permeable anode are increased by 12% and 50%, respectively, compared with those of carbon paper and carbon cloth permeable anode. The parasitic current density caused by fuel permeation is only 0.86% of the current density when the cell voltage is 0.8 V. The performance of the battery increases with the increase of graphite felt electrode thickness, but the increase decreases gradually, and the reaction mass flow increases, the performance of the battery increases first and then tends to be stable.
【作者單位】： 重慶大學(xué)低品位能源利用技術(shù)及系統(tǒng)教育部重點(diǎn)實(shí)驗(yàn)室;重慶大學(xué)工程熱物理研究所;
【基金】：國家杰出青年科學(xué)基金項(xiàng)目(51325602) 國家自然科學(xué)基金重點(diǎn)國際(地區(qū))合作研究項(xiàng)目(1620105011);國家自然科學(xué)基金項(xiàng)目(5313762)~~
【分類號】：TM911.4
本文編號：2371708
[Abstract]:In this paper, a three-dimensional isothermal steady state mathematical model is established for the air self-breathing membrane free microfluid fuel cell with three dimensional graphite felt permeable anode. The flow and transmission of fuel and electrolyte in the cell are studied. The kinetics of electrode process and charge transfer process were simulated, and the mass transfer and fuel permeation characteristics in microfluid fuel cell with graphite felt anode were calculated. The effects of the thickness of graphite felt and the flow rate of reactants (fuel and electrolyte) on the performance of the battery were studied. The results show that when the inlet flow rate is 333 渭 l min-1, the limit current density and the limit power density of graphite felt permeable anode are increased by 12% and 50%, respectively, compared with those of carbon paper and carbon cloth permeable anode. The parasitic current density caused by fuel permeation is only 0.86% of the current density when the cell voltage is 0.8 V. The performance of the battery increases with the increase of graphite felt electrode thickness, but the increase decreases gradually, and the reaction mass flow increases, the performance of the battery increases first and then tends to be stable.
【作者單位】： 重慶大學(xué)低品位能源利用技術(shù)及系統(tǒng)教育部重點(diǎn)實(shí)驗(yàn)室;重慶大學(xué)工程熱物理研究所;
【基金】：國家杰出青年科學(xué)基金項(xiàng)目(51325602) 國家自然科學(xué)基金重點(diǎn)國際(地區(qū))合作研究項(xiàng)目(1620105011);國家自然科學(xué)基金項(xiàng)目(5313762)~~
【分類號】：TM911.4
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