クマタニ　アキチカ   Akichika Kumatani   熊谷　明哉    所属   千葉工業大学  工学部 電気電子工学科    千葉工業大学  工学研究科 工学専攻    職種   教授
発行・発表の年月	2019/01
形態種別	学術雑誌
査読	査読あり
標題	Scanning electrochemical cell microscopy for visualization and local electrochemical activities of lithium-ion (de) intercalation process in lithium-ion batteries electrodes
執筆形態	共著
掲載誌名	Surface and Interface Analysis
掲載区分	国外
巻・号・頁	51(1),27-30頁
著者・共著者	Akichika Kumatani,Yasufumi Takahashi,Chiho Miura,Hiroki Ida,Hirotaka Inomata,Hitoshi Shiku,Hirokazu Munakata,Kiyoshi Kanamura,Tomokazu Matsue
概要	Scanning electrochemical cell microscopy with a single barrel micro-/nano-pipette (SECCM) was applied to lithium iron phosphate (LiFePO4) composite positive electrodes and an isolated LiFePO4 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 LiFePO4 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 LiFePO4 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.
DOI	10.1002/sia.6538
ISSN	0142-2421/1096-9918