2026-04-27 東北大学
図1 局所的な電気化学反応とラマン分光情報の同時計測が可能なオペランド顕微鏡の測定の概念図。レーザーの焦点とガラスピペットの先端が一致しており、微小液滴を介して電気化学反応―本論文ではリチウムイオンの脱離・挿入プロセス―とラマン分光測定による構造変化の測定を可能としました。
＜関連情報＞
- https://www.tohoku.ac.jp/japanese/2026/04/press20260427-02-raman.html
- https://www.tohoku.ac.jp/japanese/newimg/pressimg/tohokuuniv-press20260427_02web_Raman.pdf
- https://pubs.aip.org/aip/apl/article/128/16/163905/3387465/Raman-integrated-scanning-electrochemical-cell
オペランド局所分光電気化学 のためのラマン統合型走査電気化学セル顕微鏡
Raman-integrated scanning electrochemical cell microscopy for operando localized spectroelectrochemistry
Akichika Kumatani ;Eita Tachizaki;Ryonosuke Ishige;Hiroki Ida;Yasufumi Takahashi;Susumu Shiraki;Hitoshi Shiku
Applied Physics Letters Published:April 21 2026
DOI:https://doi.org/10.1063/5.0319771
Scanning electrochemical cell microscopy (SECCM) utilizes a meniscus formed between the sample surface and the tip of a glass pipette filled with electrolyte as a confined electrochemical cell, enabling highly localized electrochemical measurement. However, SECCM alone makes it challenging to monitor chemical structure changes that accompany electrochemical reactions. In this study, we developed an in operando measurement system that integrates Raman spectroscopy with an electrochemical probe of the SECCM system, allowing simultaneous acquisition of localized electrochemical and spectroscopic data. A single crystal flakes of LiFePO4, a cathode material for lithium-ion batteries, was prepared, and changes in Raman scattering during lithium-ion charge/discharge processes were successfully monitored through the meniscus formed on their surfaces. This combined system provides nanoscale insights into electrochemical reactions and the associated structural transformations.
