Space Charge Layer Evolution in All-Solid-State Batteries Probed via Operando Kelvin Probe Force Microscopy and Nuclear Reaction Analysis.

ABSTRACT: The current controversies about the role of space charge layers hinder the development of better solid-solid interfaces and, thus, the improvement of solid-state batteries (ASSBs). To overcome this, we have combined high spatial resolution and nondestructive techniques, operando heterodyne Kelvin probe force microscopy (KPFM), and operando nuclear reaction analysis (NRA) to conduct a study of space charge layers in ASSBs. A model thin-film ASSB was fabricated from lithium (Li)|Li₃PO₄ (LPO)|LiCoO₂ (LCO) for this study. This battery excels due to negligible interfacial defects and side reactions. For a working battery voltage range from 3.0 to 4.3 V vs Li/Li⁺, a space charge layer mainly exists at the LPO|LCO interface. This space charge layer with

SUBMITTER: Zhu C 

PROVIDER: S-EPMC12632181 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature