Scalable Synthesis of Alkali Sulfide Nanocrystals Using a Bubble Column Reactor
Scalable Synthesis of Alkali Sulfide Nanocrystals Using a Bubble Column Reactor
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DOI：
10.1021/acs.iecr.8b01600
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发表时间：
2018-06
影响因子：
4.2
通讯作者：
Kristen T. Hietala;Yangzhi Zhao;Yongan Yang;C. Wolden
中科院分区：
文献类型：
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作者：
Kristen T. Hietala;Yangzhi Zhao;Yongan Yang;C. Wolden
碱金属硫化物纳米晶体（Li 2S和Na 2S）是用于制造先进电池技术的固态电解质和阴极的关键材料。我们最近开发了一种绿色化学方法，通过在环境温度下使有机溶液与硫化氢接触来反应沉淀合成这些材料。在这项工作中，开发了泡罩塔的使用，作为这些纳米材料的可扩展制造的平台。重现间歇反应器合成的初始尝试由于纳米颗粒堵塞分布器而变得复杂。这是通过在喷射器和溶液之间引入惰性流体柱来解决的。使用该4相鼓泡塔，在探索的全部条件范围内合成无水、相纯的Li 2S和Na 2S纳米晶体。X-射线衍射分析表明，初始晶粒尺寸为20-40 nm，聚集成数百nm的聚集体。这项工作验证了气泡柱的潜力。
Alkali sulfide nanocrystals (Li2S and Na2S) are critical materials used to make solid-state electrolytes and cathodes for advanced battery technologies. We have recently developed a green chemistry for the synthesis of these materials through reactive precipitation by contacting organic solutions with hydrogen sulfide at ambient temperature. In this work, the use of bubble columns was developed as a platform for scalable manufacturing of these nanomaterials. Initial attempts to reproduce the batch reactor synthesis were complicated by nanoparticles clogging the sparger. This was resolved through the introduction of an inert column of fluid between the sparger and the solution. Using this 4-phase bubble column, anhydrous, phase-pure Li2S and Na2S nanocrystals were synthesized across the full range of conditions explored. X-ray characterization showed that the primary crystallite size was 20–40 nm, assembling into aggregates of hundreds of nanometers in size. This work validates the potential of bubble colu...