Correlative Electrochemical Microscopy of Li-Ion (De)intercalation at a Series of Individual LiMn2O4 Particles

Binglin Tao, Lewis C. Yule, Enrico Daviddi, Cameron L. Bentley, Patrick R. Unwin

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Abstract

The redox activity (Li-ion intercalation/deintercalation) of a series of individual LiMn2O4 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.

Original languageEnglish
Pages (from-to)4606-4611
Number of pages6
JournalAngewandte Chemie - International Edition
Volume58
Issue number14
DOIs
Publication statusPublished - 26 Mar 2019
Externally publishedYes

Keywords

  • batteries
  • electrochemistry
  • LiMnO
  • Scanning electrochemical microscopy
  • single-particle analysis

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