Solvent engineered synthesis of layered SnO for high-performance anodes
Solvent engineered synthesis of layered SnO for high-performance anodes
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DOI：
10.1038/s41699-021-00208-1
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发表时间：
2021-03-03
影响因子：
9.7
通讯作者：
Nicolosi, Valeria
中科院分区：
文献类型：
--
作者：
Jaskaniec, Sonia;Kavanagh, Sean R.;Nicolosi, Valeria
电池是电化学能量存储的最丰富的形式。锂离子和钠离子电池占据了电池市场的很大一部分，但仍需要为这些技术发现和优化高性能的电化学活性材料。最近，氧化锡（II）（SnO）已经成为非常有前途的电池电极。在这项工作中，我们提出了一种简便的合成方法来生产SnO微粒，其大小和形状可以通过改变溶剂的性质来定制。我们研究了湿化学合成条件和所得层状纳米粒子形态之间的复杂关系。此外，高层次的电子结构理论，包括分散校正占货车德瓦尔斯力，是用来提高我们的理解的基础化学机制。确定的电子真空对齐和表面能，允许的预测的vacically有利的晶体形状（武尔夫建设）和表面加权功函数。最后，将合成的纳米材料作为锂离子电池阳极进行测试，证明从特定合成条件获得的形态的电化学性能显著增强。
Batteries are the most abundant form of electrochemical energy storage. Lithium and sodium ion batteries account for a significant portion of the battery market, but high-performance electrochemically active materials still need to be discovered and optimized for these technologies. Recently, tin(II) oxide (SnO) has emerged as a highly promising battery electrode. In this work, we present a facile synthesis method to produce SnO microparticles whose size and shape can be tailored by changing the solvent nature. We study the complex relationship between wet-chemistry synthesis conditions and resulting layered nanoparticle morphology. Furthermore, high-level electronic structure theory, including dispersion corrections to account for van der Waals forces, is employed to enhance our understanding of the underlying chemical mechanisms. The electronic vacuum alignment and surface energies are determined, allowing the prediction of the thermodynamically favoured crystal shape (Wulff construction) and surface-weighted work function. Finally, the synthesized nanomaterials were tested as Li-ion battery anodes, demonstrating significantly enhanced electrochemical performance for morphologies obtained from specific synthesis conditions.