Electrical resistance of the current collector controls lithium morphology.

ABSTRACT: The electrodeposition of low surface area lithium is critical to successful adoption of lithium metal batteries. Here, we discover the dependence of lithium metal morphology on electrical resistance of substrates, enabling us to design an alternative strategy for controlling lithium morphology and improving electrochemical performance. By modifying the current collector with atomic layer deposited conductive (ZnO, SnO₂) and resistive (Al₂O₃) nanofilms, we show that conductive films promote the formation of high surface area lithium deposits, whereas highly resistive films promote the formation of lithium clusters of low surface area. We reveal an electrodeposition mechanism in which radial diffusion of electroactive species is promoted on resistive substrat

SUBMITTER: Oyakhire ST 

PROVIDER: S-EPMC9276694 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature