Photo-Enhanced Magnesium-Ion Capacitors Using Photoactive Electrodes.
Photo-Enhanced Magnesium-Ion Capacitors Using Photoactive Electrodes.
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DOI：
10.1002/smll.202202785
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发表时间：
2022-08
期刊：
影响因子：
13.3
通讯作者：
S. Park;B. D. Boruah;A. Pujari;Byung-Man Kim;M. D. De Volder
中科院分区：
文献类型：
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作者：
S. Park;B. D. Boruah;A. Pujari;Byung-Man Kim;M. D. De Volder
离网电源在从自主传感器网络到对抗能源贫困等应用中变得越来越重要。光与某些类型的电池和电容器材料的相互作用最近引起了人们的关注，以提高倍率性能，甚至直接用光给储能装置充电。有趣的是，这些设备有可能减少自主电源的体积和成本。如图所示，是一个光增强镁离子电容器。后者很有趣，因为镁的天然丰度很大，而且它能够在低成本和不易燃的水性电解质中运行。使用二氧化钒和还原氧化石墨烯组合的光电极可以在光照下实现高达56%的电容增强，同时能量密度提高21%，达到20.5 mAh kg-1。
Off-grid power sources are becoming increasingly important for applications ranging from autonomous sensor networks to fighting energy poverty. Interactions of light with certain classes of battery and capacitor materials have recently gained attention to enhance the rate performance or to even charge energy storage devices directly with light. Interestingly, these devices have the potential to reduce the volume and cost of autonomous power sources. Here, a light-enhanced magnesium (Mg)-ion capacitor is shown. The latter is interesting because of the large natural abundance of Mg and its ability to operate in low cost and non-flammable aqueous electrolytes. Photoelectrodes using a combination of vanadium dioxide and reduced graphene oxide can achieve capacitance enhancements of up to 56% under light exposure alongside a 21% higher energy density of 20.5 mAh kg-1 .