Performance of commercial aluminium alloys as anodes in gelled electrolyte aluminium-air batteries
Performance of commercial aluminium alloys as anodes in gelled electrolyte aluminium-air batteries
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DOI：
10.1016/j.jpowsour.2015.08.088
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发表时间：
2015-12-20
影响因子：
9.2
通讯作者：
Ocon, P.
中科院分区：
文献类型：
--
作者：
Pino, M.;Chacon, J.;Ocon, P.
对铝空气电池用铝合金Al 2024、Al 7475和Al 1085进行了评价。还评价了纯铝包覆的Al 2024和Al 7475。在由商业合金样品、商业空气阴极和易于合成的凝胶碱性电解质组成的凝胶Al-空气电池中测量了0.8 mA cm（-2）至8.6 mA cm（-2）的电流速率。通过EDX/SEM研究和分析了合金元素和添加到电解液中的ZnO和ZnCl_2作为缓蚀剂的影响。在1.3 - 1.4 V的平电位放电条件下，比容量可达426 mAh/g。文中还讨论了自腐蚀和氧化反应之间的竞争，以及电流对该过程的影响。Al 7475作为铝-空气一次电池的阳极具有最佳性能，包覆工艺被发现是一种额外的保护，在小电流放电时免受腐蚀。相反，Al 1085由于不利的金属组成而提供更差的结果。(C)2015 Elsevier B. V.版权所有。
The evaluation of commercial aluminium alloys, namely, Al2024, Al7475 and Al1085, for Al-air batteries is performed. Pure Al cladded Al2024 and Al7475 are also evaluated. Current rates from 0.8 mA cm(-2) to 8.6 mA cm(-2) are measured in a gel Al-air cell composed of the commercial alloy sample, a commercial air-cathode and an easily synthesizable gelled alkaline electrolyte. The influence of the alloying elements and the addition to the electrolyte of ZnO and ZnCl2, as corrosion inhibitors is studied and analysed via EDX/SEM. Specific capacities of up to 426 mAh/g are obtained with notably flat potential discharges of 1.3 -1.4 V. The competition between self-corrosion and oxidation reactions is also discussed, as well as the influence of the current applied on that process. Al7475 is determined to have the best behaviour as anode in Al-air primary batteries, and cladding process is found to be an extra protection against corrosion at low current discharges. Conversely, Al1085 provided worse results because of an unfavourable metallic composition. (C) 2015 Elsevier B.V. All rights reserved.