论文标题
在聚乙烯乙二醇低聚物添加剂的存在下进行电向感染的流动
Electroconvective flow in presence of polyethylene glycol oligomer additives
论文作者
论文摘要
电池中的金属电沉积在根本上是不稳定的，并且受不同不稳定性的影响，具体取决于工作条件和化学组成。尤其是在高充电速率下，一种称为电射感的流体动力不稳定性通过在电极上产生非均匀的离子通量和优先沉积来加剧情况。在这里，我们通过实验研究了阳离子选择性界面处的流体动力不稳定性如何与流体动力的不稳定性相互作用。从电化学测量和直接可视化实验中，我们发现在存在低聚物的情况下，电射感被延迟和抑制。我们的结果还表明，除了大量效应之外，要考虑聚合物在界面中的作用很重要，以了解稳定效应及其机制。
Metal electrodeposition in batteries is fundamentally unstable and affected by different instabilities depending on operating conditions and chemical composition. Particularly at high charging rates, a hydrodynamic instability called electroconvection sets in that aggravates the situation by creating non-uniform ion flux and preferential deposition at the electrode. Here, we experimentally investigate how oligomer additives interact with the hydrodynamic instability at a cation selective interface. From electrochemical measurements and direct visualization experiments, we find that electroconvection is delayed and suppressed at all voltage in the presence of oligomers. Our results also reveal that it is important to consider the role of polymers at the interface, in addition to their bulk effects, to understand the stabilization effect and its mechanism.
