Suppression of dendrite growth in electrochemical reactions based on modeling of growing interfaces

研究了对可充电电池中枝晶生长的抑制。我们发现疏水多孔电极，如多孔硅，导致多孔结构内电沉积的极大增强。借助于统计力学理论，揭示了当表面呈现疏水性时，金属离子的表面浓度会大大增加。以多孔硅为基体可明显抑制电沉积过程中枝晶的生长。这一结果源于高电流效率，即使施加的电流密度远高于极限电流。

Suppression of dendrite growth in rechargeable batteries was studied. We have found that hydrophobic porous electrodes such as porous silicon lead to an extreme enhancement of electrodeposition within the porous structures. With an aid of the statistical-mechanical theory, it has been revealed that the surface concentration of metal ions was greatly enriched when the surface shows hydrophobic property. The growth of dendrites in electrodeposition was strongly suppressed when using porous silicon as a host matrix. This result originates from a high current efficiency even when applying a current density much higher than the limiting current.