On rechargeability and reaction kinetics of sodium–air batteries
On rechargeability and reaction kinetics of sodium–air batteries
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DOI：
10.1039/c4ee01654h
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发表时间：
2014-10
影响因子：
32.5
通讯作者：
H. Yadegari;Yongliang Li;M. Banis;Xifei Li;Biqiong Wang;Qian Sun;Ruying Li;T. Sham;X. Cui;X. Sun
中科院分区：
文献类型：
--
作者：
H. Yadegari;Yongliang Li;M. Banis;Xifei Li;Biqiong Wang;Qian Sun;Ruying Li;T. Sham;X. Cui;X. Sun
可充电金属-空气电池被广泛认为是下一代高能量密度的电化学存储装置。这些金属-空气电池的性能和可充性高度依赖于正极材料，在那里发生氧还原和析出反应。在这里，我们第一次通过对经过处理的商业碳材料进行一系列精心设计的测试，详细介绍了钠-空气电池的动力学和可充性。对正极材料的比表面积和孔结构进行了控制，以获得钠-空气电池反应动力学的详细信息。结果表明，放电容量与比表面积呈线性关系，而固体放电产物的形貌强烈依赖于比表面积和孔径。此外，还发现放电反应速率对放电产物的化学成分和充电过电位有影响。
Rechargeable metal–air batteries are widely considered as the next generation high energy density electrochemical storage devices. The performance and rechargeability of these metal–air cells are highly dependent on the positive electrode material, where oxygen reduction and evolution reactions take place. Here, for the first time, we provide a detailed account of the kinetics and rechargeability of sodium–air batteries through a series of carefully designed tests on a treated commercial carbon material. Surface area and porous structure of the positive electrode material were controlled in order to gain detailed information about the reaction kinetics of sodium–air batteries. The results indicate that discharge capacity is linearly correlated with surface area while morphology of the solid discharge product is strongly dependent on specific surface area and pore size. Furthermore, it was found that the chemical composition of discharge products as well as charging overpotential is affected by discharge reaction rate.