Understanding the electrochemical processes and interfacial behavior at the molecular level is beneficial to the rational design and control of the interfacial structure in order to gain optimal performance, which is not only important to electroanalysis, but also to various field of electrochemistry, including electrocatalysis, electrodeposition, corrosion and energy storage devices. We have been developing operando Raman spectroscopy to investigate electrochemical system with improved sensitivity, temporal and spatial resolution. Our current study is focused in the following aspects:
1. Developing Raman microscopy to allow the full integration in real time with electrochemical techniques, including cyclic voltammetry, electrochemical impedance spectroscopy, ellipsometry, for studying the interfacial process related to various ion batteries, corrosion, electrocatalytic processes.
2. Developing single-particle electrochemical and operando full-wavelength resonant Raman system, for realizing the characterization of the intrinsic structure-activity relationship of individual active particles in commercial batteries.
3. Developing dynamic Raman imaging system of high spatio-temporal resolution, including electrochemical wide-field Raman imaging technology.
4. Developing electrochemical operando tip-enhanced Raman spectroscopy technology integrated with peak force AFM to realize the multi-modal analysis of nanoscale force-electrochemical-structure-chemical fingerprints.