Recent Progress on In Situ/Operando Characterization of Rechargeable Alkali Ion Batteries. Issue 10 (21st October 2021)

• Record Type: Journal Article
• Authors: Sun, Zehang; Zhang, Yamin; Liu, Yang; Hou, Linrui; Yuan, Changzhou
• Is Part Of: ChemPlusChem. Volume 86:Issue 10(2021)
• Page Start: 1487
• Page End: 1496
• Publication Date: 2021-10-21
• Subjects: alkali ion batteries -- energy storage -- electrochemistry -- electrode materials -- in situ/operando techniques; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cplu.202100393
• Languages: English
• ISSNs: 2192-6506

Abstract

Abstract: The specific chemical and physical evolutions of electrode materials under operating conditions should be understood to optimize their electrochemical performances. The in‐situ /operando techniques including Raman spectrum, transmission electron microscope, X‐ray diffraction, X‐ray absorption spectrum, and magnetization are powerful tools, which can provide the real‐time surficial/interfacial changes of electrodes, the transformation of crystal lattice structures, the adjustment of electronic states and even the influence of magnetic properties under operating conditions. In this Review, the advantages and limitations of these in‐situ /operando techniques in investigating the inner energy storage mechanisms of various type electrode materials are analyzed. The representative research results such as the ion dependent storage mechanism, step‐alloying processes and space charge storage theory are highlighted. In addition, the challenges and opportunities of in‐situ /operando characterizations are proposed as well. Abstract : Recent progresses on in‐situ /operando Raman, TEM, XRD, XAS and magnetometry probing towards in‐depth understanding of intrinsic electrochemical behaviors are summarized for rechargeable alkali ion batteries. The results demonstrated that unique properties of alkali‐ions, composition of electrolytes, and element compositions, crystal structures, even construction methods of electrodes all affects electrochemical mechanism to some content. More importantly, the advantages/limitations of these in‐situ /operando techniques are analyzed, along with the involved challenges and future opportunities.