【摘要】 采用单体电池放电实验,研究了LiSi/FeS₂热电池中放电温度、FeS₂粒径和正极中电解质含量对正极活性材料FeS₂利用率的影响,并通过脉冲放电实验和场发射扫描电镜测试,从极化和微观形貌方面阐释了相关影响机理。研究结果表明,在450℃条件下,FeS₂利用率随着其粒径（小于250μm）的减小和电解质含量（10%³0%）的升高而增大;在550℃条件下,当FeS₂粒径在120²50μm时,FeS₂利用率随着电解质含量的增加而增大,当FeS₂粒径为75¹20μm和<75μm时,FeS₂利用率随着电解质含量的增加先增大后减小。更多还原

【Abstract】 The single-cell discharge experiments were applied to investigate the effect of discharge temperature,particle diameter of FeS₂ and electrolyte concentration in cathode on the utility ratio of active cathode material in LiSi/FeS₂ thermal battery.The relative mechanisms were explained in aspects of polarization and microcosmic appearance by pulse discharge experiments and test of field emission scanning electron microscope.The results indicate that the utility ratio of FeS₂ increases with the diminishing FeS₂ particle size（less than 250μm）and the rising electrolyte concentration（10%-30%）in the condition of 450℃.In the condition of 550℃,the utility ratio of FeS₂ increases with the higher electrolyte concentration when theparticle size of FeS₂ is in the range of 120-250μm,but,when the FeS₂ particle size is 75-120μm and less than 75μm,the utility ratio of FeS₂ first increases,and then decreases,with the increasing electrolyte concentration.更多还原