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Investigation on the lithium intercalation of Sn-Zn alloy as anode materials for lithium ion battery

机译:Sn-Zn合金作为锂离子电池负极材料的锂嵌入研究

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Based on First-principle plane wave pseudo-potential method, we have carried out an in-dept study on the lithium intercalation mechanism of Sn-Zn alloy as anode materials for lithium ion batteries. All of the calculation were carried out under material studio 4.1. Through investigation, we found that Lithium intercalating into Sn-Zn alloy react into separated phases made up of Li-Sn phases and Li-Zn phases. The Li5Sn2 phase and LiZn phase contribute to cycle performance, while Li13Sn5 phase and Li2Sn2 phase lead to irreversible capacity loss due to high formation energy and high volume expansion. And we found that the first-principle investigation method is of far-reaching significance in synthesizing new commercial anode materials with high capacity and good cycle performance.
机译:基于第一性原理平面波拟电位方法,我们对作为锂离子电池负极材料的Sn-Zn合金的锂嵌入机理进行了深入研究。所有计算均在Material Studio 4.1下进行。通过研究,我们发现嵌入到Sn-Zn合金中的锂会反应成由Li-Sn相和Li-Zn相组成的分离相。 Li5Sn2相和LiZn相有助于循环性能,而Li13Sn5相和Li2Sn2相由于形成能量高和体积膨胀大而导致不可逆的容量损失。并且我们发现,第一性原理研究方法在合成具有高容量和良好循环性能的新型商业阳极材料方面具有深远的意义。

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