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Scanning electrochemical cell microscopy for visualization and local electrochemical activities of lithium‐ion (de) intercalation process in lithium‐ion batteries electrodes
Author(s) -
Kumatani Akichika,
Takahashi Yasufumi,
Miura Chiho,
Ida Hiroki,
Inomata Hirotaka,
Shiku Hitoshi,
Munakata Hirokazu,
Kanamura Kiyoshi,
Matsue Tomokazu
Publication year - 2019
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6538
Subject(s) - lithium (medication) , electrode , electrochemistry , electrolyte , analytical chemistry (journal) , lithium vanadium phosphate battery , cyclic voltammetry , materials science , chemistry , electrochemical cell , reference electrode , ion , inorganic chemistry , chromatography , medicine , organic chemistry , endocrinology
Scanning electrochemical cell microscopy with a single barrel micro‐/nano‐pipette (SECCM) was applied to lithium iron phosphate (LiFePO 4 ) composite positive electrodes and an isolated LiFePO 4 secondary particle for lithium‐ion batteries. To analyze lithium‐ion (Li + ) charge or discharge process on the electrodes using local probe, a pipette filled with LiCl electrolyte solution and Ag/AgCl quasi‐reference counter electrode (QRCE) was used. Both the local electrochemical activities of LiFePO 4 on the composite electrodes and a single particle were revealed by SECCM as in‐situ direct measurement of current response‐related Li + transport from mapping and cyclic voltammogram at confined area by the pipette. The mapping has visualized Li + deintercalation process from LiFePO 4 at +0.65 V (applied between the sample‐QRCE). We show that the SECCM system is a strong analytical tool for a characterization of local Li + behavior of active electrode materials in lithium‐ion batteries.