Correlative Electrochemical Microscopy of Li‐Ion (De)intercalation at a Series of Individual LiMn2O4 Particles. (21st February 2019)

• Record Type: Journal Article
• Authors: Tao, Binglin; Yule, Lewis C.; Daviddi, Enrico; Bentley, Cameron L.; Unwin, Patrick R.
• Is Part Of: Angewandte Chemie. Volume 131:Number 14(2019)
• Page Start: 4654
• Page End: 4659
• Publication Date: 2019-02-21
• Subjects: Batterien -- Einzelpartikelanalyse -- Elektrochemie -- Elektrochemische Scan-Mikroskopie -- LiMn2O4; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201814505
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The redox activity (Li‐ion intercalation/deintercalation) of a series of individual LiMn2 O4 particles of known geometry and (nano)structure, within an array, is determined using a correlative electrochemical microscopy strategy. Cyclic voltammetry (current–voltage curve, I – E ) and galvanostatic charge/discharge (voltage–time curve, E – t ) are applied at the single particle level, using scanning electrochemical cell microscopy (SECCM), together with co‐location scanning electron microscopy that enables the corresponding particle size, morphology, crystallinity, and other factors to be visualized. This study identifies a wide spectrum of activity of nominally similar particles and highlights how subtle changes in particle form can greatly impact electrochemical properties. SECCM is well‐suited for assessing single particles and constitutes a combinatorial method that will enable the rational design and optimization of battery electrode materials. Abstract : Die Teilchen des Ganzen : Die Elektrochemie einer Serie von LiMn2 O4 ‐Kathodenmaterialien wurde auf Einzelpartikelebene untersucht. Vielfältige charakteristische Merkmale wurden aufgedeckt, die der mikroskopisch ermittelten Struktur und Morphologie des Partikels zugeordnet werden können.