基于DLP技术制备SOFC电解质及性能研究

Preparation and Properties of SOFC Electrolytes Based on DLP Technology

固体氧化物燃料电池(SOFC)作为一种清洁、高效的新型燃料电池,其电解质是决定电池整体性能的关键因素。以改性后的氧化钇稳定氧化锆(YSZ)为原料,光敏树脂作为固化剂,利用数字光处理技术(DLP)将固含量为20%YSZ进行逐层打印,通过控制变量的方法进行探究不同分散剂YSZ悬浮液稳定性影响,以及不同烧结温度下,YSZ电解质片致密度的影响。研究结果表明:以吐温-80和聚乙二醇400(PEG-400)作为分散剂的YSZ悬浮液稳定性较好,其中以吐温-80为分散剂的YSZ悬浮液最为稳定。将打印后的固含量为20%的YSZ电解质前驱体分别在1400℃、1450℃和1500℃进行烧结后,其收缩率分别为41.01%、48.81%和49.36%。在1500℃的烧结温度下,YSZ电解质在800℃的总电导率为3.19×10^(-2)S/cm。

A solid oxide fuel cell(SOFC)is a new type of clean and efficient fuel cell,and its electrolyte is a key factor that determines the overall performance of the cell.In this paper,modified yttrium-stabilized zirconia oxide(YSZ)is used as a raw material and photosensitive resin as a curing agent.With digital light processing technology(DLP),YSZ,with a solid content of 20%,is printed layer by layer.The study investigated the effect of different dispersants on the stability of YSZ suspension and the influence of different sintering temperatures on the density of YSZ electrolyte using a controlled variable method.The results show that the YSZ suspension with Tween-80 and polyethylene glycol 400(PEG-400)as dispersants has excellent stability,and the YSZ suspension with Tween-80 as dispersants is the most stable.The printed YSZ electrolyte precursors with 20%solid content are sintering at 1400℃,1450℃and 1500℃,with shrinkage rates of 41.01%,48.81%and 49.36%,respectively.At a sintering temperature of 1500℃,the total conductivity of the YSZ electrolyte at 800℃is 3.19×10^(-2)S/cm.