钠离子在燃料电池中作用机制的研究

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文章以镧锶钴铁氧化物(LSCF)-钐掺杂氧化铈(SDC)复合碳酸钠(Na2CO3)为电解质,组装固体氧化物燃料电池,分析Na+对电池性能的影响及其作用机制。Na2CO3在电解质中以无定形状态存在,起到粘合剂的作用,提高了电解质的气密性。电解质致密的微结构有利于隔绝电池两端的燃料和氧化剂,提高燃料电池性能。LSCF-SDC中掺入Na2CO3和NaOH后,燃料电池的输出功率密度峰值分别由未掺杂时的375 mW/cm2上升到450 mW/cm2和430 mW/cm2,说明Na+对燃料电池的性能有着积极的影响。掺入K2CO3后燃料电池的输出功率反而降低,说明燃料电池性能的提升来源于Na+,而非CO32-。
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