【摘要】 熔融碳酸盐燃料电池(MCFC)首次启动的隔膜烧结中,组装压力对隔膜电化学性能有一定的影响,最佳值为2.4MPa。隔膜烧结初期的短期内,组装压力在一定的范围内对隔膜电化学性能无影响。在隔膜烧结初期,高温(650℃)下浸满电解质烧结的隔膜中的粉粒发生重排和滑移,隔膜的最大孔径(Dmax)逐步变小;在合适的组装压力下,隔膜的Dmax最大值和滑移速率分别小于和反向高于同温度常压下浸入少量(5%)电解质烧结的隔膜的相应值。组装压力促使隔膜粉粒重排和滑移的发生,但又抑制和减小隔膜内缺陷的发展。经过长时间烧结的隔膜,Dmax小于隔膜寿命极限值7.92μm,满足了电池长期性能稳定的需要。更多还原

【Abstract】 The stacking pressure influenced the matrix electrochemical performance during the matrix sintering in the first start-up of molten carbonate fuel cell(MCFC);the optimum value was 2.4 MPa.In the short-term of the initial stage of matrix sin-tering,the stacking pressure had no influence on the matrix electrochemical performance in some range.In the initial matrix sintering stage,in the matrix impregnated fully with electrolyte at high temperature(650 ℃),the rearrangement and slip of powder particles brought out the maximum pore diameter(Dmax) altering to be a smaller one.The Dmax in the matrix and its alteration rate were smaller and opposite higher than those in the sintered matrix impregnated with less(5%) electrolyte under the ordinary pressure and at same temperature.The stacking pressure facilitated the rearrangement and slip of powder particles,but suppressed and diminished defect development in the matrix.The Dmax in matrix after long time sintering was smaller than that one(7.92 μm) limited by lifetime of the matrix,satisfied the need for the long-term stable duration of the cell performance.更多还原