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首页> 外文期刊>Environmental Science & Technology >Trash to Treasure: From Harmful Algal Blooms to High-Performance Electrodes for Sodium-Ion Batteries
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Trash to Treasure: From Harmful Algal Blooms to High-Performance Electrodes for Sodium-Ion Batteries

机译：垃圾到宝藏：从有害的藻华到用于钠离子电池的高性能电极

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摘要

Harmful algal blooms (HABs) are frequently reported around the globe. HABs are typically caused by the so-called blue-green algae in eutrophic waters. These fast-growing HABs could be a good source for biomass. Unlike terrestrial plants, they need no land or soil. If HABs could be harvested on a large scale, it could not only possible to mitigate the issue of HABs but also provide a source of biomass. Herein, we demonstrate a facile procedure for converting the HABs into a promising high-performance negative-electrode material for sodium-ion batteries (SIBs). The carbon material derived from blue-green algae demonstrated promising electrochemical performance in reversible sodium storage. The algae used in this work was collected directly from Lake Erie during the algal blooms that affected 500 000 residents in Toledo in 2014. The carbon, derived from the freshly collected HABs by calcination in argon without any additional purification process, delivered a highly stable reversible specific capacity (～230 mAh/g at a testing current of 20 mA/g) with nearly 100% Columbic efficiency in sodium storage. Impressive rate performance was achieved with a capacity of-135 mAh/g even after the testing current was increased fivefold. This proof of concept provides a promising route for mitigating the issue of HABs as "trash" and for generating high-capacity, low-cost electrodes for SIBs as "treasure".
机译：在全球范围内经常报告有害藻华（HAB）。 HAB通常是由富营养化水中的所谓蓝绿藻引起的。这些快速增长的HAB可能是生物质的良好来源。与陆生植物不同，它们不需要土地或土壤。如果可以大规模收获HAB，则不仅可以减轻HAB的问题，而且可以提供生物质的来源。在这里，我们展示了一种简便的程序，可将HAB转换为用于钠离子电池（SIB）的有前途的高性能负极材料。源自蓝绿色藻类的碳材料在可逆钠存储中表现出令人鼓舞的电化学性能。 2014年，这项工作中使用的藻类是从伊利湖中直接采集的，当时藻类大量繁殖，这影响了托莱多的500 000居民。碳是通过在氩气中煅烧而从新鲜收集的HAB中煅烧而得的，无需任何额外的纯化工艺，即可提供高度稳定的可逆性比容量（在20 mA / g的测试电流下约为230 mAh / g），在钠存储中的哥伦布效率接近100％。即使将测试电流增加了五倍，容量仍为-135 mAh / g时，仍实现了令人印象深刻的速率性能。这一概念证明为减轻HAB的“废品”问题和为SIB生成大容量，低成本的电极提供了“希望”的有希望的途径。

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  • 来源
    《Environmental Science & Technology》 |2015年第20期|12543-12550|共8页
  • 作者

    Xinghua Meng; Phillip E. Savage; Da Deng;

  • 作者单位

    Department of Chemical Engineering and Materials Science, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan, 48202, United States;

    Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States;

    Department of Chemical Engineering and Materials Science, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan, 48202, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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