Hongchao Wang , Jian Wang , Zhijiang Jin , Hongxin Li , Haoran Dou , Jie Shi , Cundi Wei , Qian Gao
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引用次数: 1
摘要
研制了一种用于可穿戴电子产品的高性能液态合金活化阳极柔性铝空气电池。通过在铝阳极上构建由Ga-In液体颗粒(GILPs)组成的活化界面,提高了柔性铝空气电池的电化学性能。这项工作验证了GILPs不仅可以作为Al原子氧化反应的活性位点,避免钝化膜的生成,而且可以进一步扩大Al的活性范围,提高电池的整体性能。这些gilp还表现出令人满意的导电性,以减少铝阳极在放电过程中的机械损耗,从而提高电池的能量利用率。在电流密度为1 mA cm−2时,含有150 μg cm−2 GILPs的Al-air电池的容量达到2345 mA h g−1,是未加载GILPs的Al-air电池的1.6倍。对铝阳极的厚度和面积进行了放大实验。结果表明,增大铝阳极厚度可延长电池寿命,电池整体放大效率大于93.5%。本研究为铝空气电池在柔性可穿戴电源领域的应用开辟了前景。
High-performance flexible Al-air batteries with liquid alloy-activated anode
A high-performance flexible Al-air battery with liquid alloy-activated anode system is developed for wearable electronics. By constructing activation interface composed of Ga–In liquid particles (GILPs) on the Al anode, the electrochemical performance of the flexible Al-air battery is enhanced. This work validated that GILPs can not only serve as active sites for the oxidation reaction of Al atoms to avoid the generation of passivation film, but also can further expand the active Al range and improve overall performance of the battery. These GILPs also exhibit satisfying electrical conductivity to reduce the mechanical loss of the Al anode during discharge, resulting in a high energy utilization of the battery. The Al-air battery with 150 μg cm−2 GILPs displays remarkable capacities of 2345 mA h g−1 at the current density of 1 mA cm−2, 1.6 times higher than that of Al-air battery without GILPs loading. Amplification experiment of Al anodes’ thickness and area are performed. The results indicate that the lifetime of battery can be extended by scaling up thickness of Al anode, and overall battery amplification efficiency is greater than 93.5%. This study opens up a prospect for the application of Al-air batteries in the field of flexible wearable power supply devices.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems