Premium
Correlative Electrochemical Microscopy of Li‐Ion (De)intercalation at a Series of Individual LiMn 2 O 4 Particles
Author(s) -
Tao Binglin,
Yule Lewis C.,
Daviddi Enrico,
Bentley Cameron L.,
Unwin Patrick R.
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201814505
Subject(s) - intercalation (chemistry) , cyclic voltammetry , electrochemistry , scanning electron microscope , crystallinity , materials science , electrode , particle (ecology) , correlative , analytical chemistry (journal) , microscopy , ion , chemistry , crystallography , inorganic chemistry , composite material , optics , organic chemistry , linguistics , oceanography , philosophy , physics , geology
The redox activity (Li‐ion intercalation/deintercalation) of a series of individual LiMn 2 O 4 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.