论文标题
锂金属电沉积的动力学：气泡的影响
Dynamics of the lithium metal electrodeposition: Effects of a gas bubble
论文作者
论文摘要
由于全球运输电气化的趋势，最近对可充电锂金属电池进行了广泛的研究。了解锂金属电沉积的动力学对于设计安全可靠的锂金属阳极至关重要。在这项研究中，我们开发了一个基于巨大的潜在相位场模型，以研究静态气泡的影响，该静态气泡的作用是由于复杂的内部侧反应对电沉积过程中树突生长动力学的动力学而形成的。据观察，由于存在气泡的存在，由于锂离子在气泡远离阳极表面的远端积累，树突的生长大大加速，这可以用作树突生长的离子“储层”，从而导致岩石木叶状树状弯曲的lith/倾斜。同时，进一步研究了气泡尺寸和距离阳极距离的影响，表明气泡尺寸越大，靠近阳极越靠近阳极，锂树突生长的时间就越长。我们希望这项研究可以作为利用外部因素对树突生长动态的影响的一个例子。
Rechargeable lithium metal batteries have been widely investigated recently, driven by the global trend for the electrification of transportation. Understanding the dynamics of lithium metal electrodeposition is crucial to design safe and reliable lithium metal anodes. In this study, we developed a grand potential-based phase-field model to investigate the effect of a static gas bubble, which forms due to the complicated internal side reactions, on the dynamics of the dendrite growth during electrodeposition. It is observed that with the presence of a gas bubble, the dendrite growth is largely accelerated, due to the accumulation of lithium ions on the far side of the bubble away from the anode surface, which could serve as an ion "reservoir" for the dendrite growth, leading to the bending/tilting of the lithium dendrites toward the bubble. Meanwhile, the effects of the bubble size and distance to the anode are further studied, demonstrating that the larger the bubble size and the closer to the anode, the longer the lithium dendrites grow. We hope this study could serve as an example to exploit the effect of extrinsic factors on the dendrite growth dynamics.
