Scanning Electrochemical Microscopy for Chemical Imaging and Understanding Redox Activities of Battery Materials  

作　　者：Lyndi E.Strange Xiao Li Eric Wornyo Md Ashaduzzaman Shanlin Pan 

机构地区：[1]Pacific Northwest National Laboratory,Energy and Environment Directorate,Richland,Washington 99352,United States of America [2]The University of Alabama,Department of Chemistry and Biochemistry,Tuscaloosa,Alabama 99354,United States of America

出　　处：《Chemical & Biomedical Imaging》2023年第2期110-120,共11页化学与生物医学影像（英文）

基　　金：supporting this work under Award Number CBET-2113505;support of the Marilyn Williams Elmore and John Durr Elmore Professor fellowship and the Alabama Transportation Institute(ATI)Seed Funding Program.

摘　　要：Improving the charge storage capacity and lifetime and charging/discharging efficiency of battery systems is essential for large-scale applications such as long-term grid storage and long-range automobiles.While there have been substantial improvements over the past decades,further fundamental research would help provide insights into improving the cost effectiveness of such systems.For example,it is critical to understand the redox activities of cathode and anode electrode materials and stability and the formation mechanism and roles of the solid−electrolyte interface(SEI)that forms at the electrode surface upon an external potential bias.The SEI plays a critical role in preventing electrolyte decay while still allowing charges to flow through the system while serving as a charge transfer barrier.While surface analytical techniques such as X-ray photoelectron(XPS),X-ray diffraction(XRD),time-of-flight secondary ion mass spectrometry(ToF-SIMS),and atomic force microscopy(AFM)provide invaluable information on anode chemical composition,crystalline structure,and morphology,they are often performed ex situ,which can induce changes to the SEI layer after it is removed from the electrolyte.While there have been efforts to combine these techniques using pseudo-in situ approaches via vacuum-compatible devices and inert atmosphere chambers connected to glove boxes,there is still a need for true in situ techniques to obtain results with improved accuracy and precision.Scanning electrochemical microscopy(SECM)is an in situ scanning probe technique that can be combined with optical spectroscopy techniques such as Raman and photoluminescence spectroscopy methods to gain insights into the electronic changes of a material as a function of applied bias.This Review will highlight the potential of SECM and recent reports on combining spectroscopic measurements with SECM to gain insights into the SEI layer formation and redox activities of other battery electrode materials.These insights provide invaluable information for improv

关 键 词：SECM SEI BATTERY scanning probe imaging LIB in situ imaging electrochemical characterization energy storage development redox-flow battery 

分 类 号：TM912[电气工程—电力电子与电力传动]