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首页> 外文期刊>Journal of Applied Electrochemistry >Influence of initial surface condition of lithium metal anodes on surface modification with HF
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Influence of initial surface condition of lithium metal anodes on surface modification with HF

机译：锂金属阳极初始表面条件对HF表面改性的影响

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Surface modification of as-received lithium foils was carried out using acid-base reactions of the native surface films on lithium metal with HF. Two types of as-received lithium foils covered with different native films were used as samples for this surface modification. One was a lithium foil having a very thin native surface film and the other one had a thicker native surface film. The surface condition of the lithium metal was analysed by X-ray photoelectron spectroscopy before and after the surface modification using HF, and the coulombic efficiency was measured electrochemically. The thickness of the surface film on the modified lithium foils was related to the Li sub 2 O layer thickness in the native film on the as-received lithium foils. The modified lithium foil which had the thinner native surface film provided more uniform deposition of lithium and a higher coulombic efficiency during charge and discharge cycles when propylene carbonate electrolyte with 1.0 M LiPF sub 6 was used as the electrolyte. These results show that the initial condition of the native surface film plays an important role in surface modification with HF.
机译：使用锂金属上的天然表面膜与HF的酸碱反应对收到的锂箔进行表面改性。两种类型的原样覆盖有不同天然薄膜的锂箔被用作该表面改性的样品。一个是具有非常薄的自然表面膜的锂箔，另一个是具有更厚的自然表面膜的锂箔。在使用HF进行表面改性之前和之后，通过X射线光电子能谱分析锂金属的表面状态，并且通过电化学测量库仑效率。改性锂箔上的表面膜的厚度与所接收的锂箔上的天然膜中的Li sub 2 O层的厚度有关。当将具有1.0M LiPF sub 6的碳酸亚丙酯电解质用作电解质时，具有更薄的自然表面膜的改性锂箔在充电和放电循环期间提供了更均匀的锂沉积和更高的库伦效率。这些结果表明，天然表面膜的初始条件在HF表面改性中起着重要作用。

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