阳极
退火(玻璃)
材料科学
电压
化学工程
粒度
开路电压
冶金
电池电压
多孔性
电池(电)
复合材料
分析化学(期刊)
电极
化学
电气工程
热力学
功率(物理)
物理
物理化学
工程类
色谱法
作者
Weili Cheng,Xu Li,Fan Chen,Lei Zhang,Jinhui Wang,Hui Yu,Lifei Wang,Zeqin Cui,Cheng Chen
标识
DOI:10.1016/j.jallcom.2024.174264
摘要
This study investigates the microstructural characteristics and discharge performance of the as-rolled Mg-0.3Sn-0.3Al-0.1Zn anodes with and without annealing. The results demonstrate that as-rolled anode exhibits a bimodal grain structure with local elements segregated regions. After annealing, the anode presents the bimodal sized grain structure without elements segregation. The Mg-air battery assumed by the as-annealed Mg-0.3Sn-0.3Al-0.1Zn anode endows a high synergy between cell voltage and specific capacity at 10 mA cm-2 (1.4132 V and 1472.76 mA h g-1). The improvement in cell voltage can be mainly attributed to the more negative open-circuit potential, lower discharge resistance and more porous discharge product film. The enhanced specific capacity is ascribed to the lower surface voltage potential difference on the anode, suppression of the chunk effect and real-time hydrogen evolution rate.
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