編號(hào)：CYYJ03357
篇名：粉末粒徑對(duì)等離子噴涂固體氧化物燃料電池陽(yáng)極微觀結(jié)構(gòu)及性能的影響
作者：朱志剛 宋琛 胡永俊 鄧暢光 劉太楷 文魁 董東東 毛杰 劉敏
關(guān)鍵詞： 陽(yáng)極 粉末粒徑 等離子噴涂 微觀結(jié)構(gòu) 固體氧化物燃料電池
機(jī)構(gòu)： 廣東工業(yè)大學(xué)材料與能源學(xué)院 廣東省科學(xué)院新材料研究所/現(xiàn)代材料表面工程技術(shù)國(guó)家工程實(shí)驗(yàn)室/廣東省現(xiàn)代表面工程技術(shù)重點(diǎn)實(shí)驗(yàn)室
摘要： As a solid oxide fuel cell anode material,NiO/Gd0.2Ce0.8O1.9(GDC)is used to replace the conventional NiO/Y0.16Zr0.92O2.08,which can effectively extend the triple-phase boundaries and improve the cell performance.In this paper,the evolution of anode microstructure and its effect on cell performance is studied by regulating the particle size of NiO/GDC agglomerated powder via atmospheric plasma spraying technique.The results show that the powder particle size affects the melting degree,and the small particle size powder melts sufficiently so that more GDC is exposed in the coating to increase the reactive sites.The large particle size powder melts insufficiently,and particle stacking creates gaps leading to more cracks and pores in the coating,thus exhibiting a larger gas flux with a leakage rate of 14.8×10-6 cm4·gf-1·s-1.The output peak power density of single cells formed by anode with small and large particle sizes is close to each other,reaching 1158.46 and 1147.0 mW·cm-2 at 800℃.The impedance spectrum fitting reveals the difference in interfacial charge transfer and gas transport capability of the anodes.By analyzing the mechanism of powder particle size on electrochemical performance,it was found that the small-particle-size anode has more interfacial active sites and shows a faster charge transfer rate,while the largeparticle-size anode has excellent gas permeability and can pass through more fuel to effectively excite active sites.Therefore,the two cells exhibit almost the same electrochemical performance.
