Open AccessOxygen electrochemistry in Li‐O 2 batteries probed by in situ surface‐enhanced Raman spectroscopy
Author(s) -
Wang Jiawei,
Ma Lipo,
Xu Junyuan,
Xu Ye,
Sun Ke,
Peng Zhangquan
Publication year - 2021
Publication title -
susmat
Language(s) - English
Resource type - Journals
ISSN - 2692-4552
DOI - 10.1002/sus2.24
Subject(s) - raman spectroscopy , electrochemistry , electrolyte , crystallinity , characterization (materials science) , chemistry , electrode , in situ , electrochemical energy conversion , materials science , nanotechnology , analytical chemistry (journal) , organic chemistry , crystallography , physics , optics
Surface‐enhanced Raman spectroscopy (SERS), as a nondestructive and ultra‐sensitive single molecular level characterization technique, is a powerful tool to deeply understand the interfacial electrochemistry reaction mechanism involved in energy conversion and storage, especially for oxygen electrochemistry in Li‐O 2 batteries with unrivaled theoretical energy density. SERS can provide precise spectroscopic identification of the reactants, intermediates and products at the electrode|electrolyte interfaces, independent of their physical states (solid and/or liquid) and crystallinity level. Furthermore, SERS's power to resolve different isotopes can be exploited to identify the mass transport limitation and reactive sites of the passivated interface. In this review, the application of in situ SERS in studying the oxygen electrochemistry, specifically in aprotic Li‐O 2 batteries, is summarized. The ideas and concepts covered in this review are also extended to the perspectives of the spectroelectrochemistry in general aprotic metal‐gas batteries.