Electrochemical potential plays a crucial role in various electrochemical systems. However, the influence distance of electrochemical potential (IDEP) remains unclear. In this study, we experimentally measured the dynamic influence range of IDEP using a designed Li|Li pouch cell with four lithium metal electrodes. The results revealed that the IDEP could reach over 1 mm, which overturns the previous understanding of its limited range. This finding may provide new insights into interface studies and interphase device design, such as batteries and capacitors.
Yang et al. (2026) studied this question.