Synchrotron radiation based operando characterization of battery materials

Abstract

Synchrotron radiation based techniques are a very powerful tool for battery research and allow probing a wide range of length scales, with different depth sensitivities and spatial/temporal resolutions. Operando experiments...

Organic electrodes based on redox-active covalent organic frameworks for lithium batteries

“…New materials, including electroactive porous organic polymers, and novel redoxactive moieties beyond the well-known organic radicals, carbonyl and organosulfur compounds have been extensively investigated for different types of batteries in recent years. 9 In addition, sophisticated operando and ex situ characterisation techniques 19,20 have been developed to further investigate charge storage mechanisms in organic compounds, whereas machine learning methods are accelerating the identification and discovery of promising organic electrodes. 21 Covalent organic frameworks (COFs) are a class of crystalline porous polymers composed of organic building blocks linked by strong covalent bonds with predictable 2D or 3D structures.…”

Replica exchange molecular dynamics for Li-intercalation in graphite: a new solution for an old problem

“…In the past decade, extensive studies have been carried out to understand the correlations between structure and reversibility of active electrode materials, [1][2][3][4] which control long-term cycling stability in modern alkali-metal ion batteries. 5 Active materials in batteries undergo dynamic structural and morphological transformations during electrochemical cycling.…”

Charge Dynamics Induced by Lithiation Heterogeneity in Silicon‐Graphite Composite Anodes

“…[28][29][30][31][32][33][34] Yet, composite anodes are intrinsically complex hierarchical multiphase materials, where the interplay between reaction and aging mechanisms requires detailed information such as chemicalknowledge over time and over extended spatial dimensions, spanning from the atomic level up to device scale. [35,36] In this context, the combination of operando small and wide angle X-ray scattering (SAXS-WAXS) is enabling novel correlations, as SAXS is sensitive to changes at the nanoscale while WAXS probes the atomic order. [23,37] Recently, the alloying process of silicon and the staging process of graphite were accessed in a single operando synchrotron SAXS/WAXS experiment performed on full cells in pouch geometry.…”