ORALS
SESSION: ElectrochemistryTueAM-R2
| Amatore International Symposium on Electrochemistry for Sustainable Development |
| Tue Nov, 6 2018 / Room: Copacabana B (150/1st) | |
| Session Chairs: Tsuyoshi Hoshino; Session Monitor: TBA |
11:45: [ElectrochemistryTueAM02]
Nanoscale Electrochemical Imaging for Functional Energy Materials Akichika
Kumatani1 ; Yasufumi
Takahashi
2 ; Tomokazu
Matsue
3 ;
1Tohoku University, Sendai, Japan;
2Kanazawa University, Kanazawa, Japan;
3Tohoku University, Sendai, Japan;
Paper Id: 405
[Abstract] Emergence of energy harvesting and storage applications is an essential in next generation with electrochemical reactions including ion transport for secondary batteries and electrocatalytic reactions for hydrogen evolution and oxygen reduction. For introducing their high functionality, active materials can be synthesized in micro-/nano-meter scale. Indeed, their exotic phenomena are induced by nanoscale effects in the comparison with the materials in bulk scale. Therefore, one of key issues is to standardize a quantitative technique for nanoscale electrochemical analysis and imaging [1]. Scanning probe microscopies are good candidates for this purpose in resolution. For example, scanning tunneling microscopy and conductive atomic force microscopy can analyze materials at atomic scale precisely. On the other hand, their information is mainly limited to electronic properties which would be indirect information related to their electrochemical properties. In recent years, scanning electrochemical microscopy (SECM) has become popular as a spatially resolved electrochemical analysis. As the challenge for SECM, it is still remained to satisfy the distance control between the sample and probe, sensitivity, spatial and temporal resolution. In this talk, as a family of SECM techniques, we will introduce our scanning electrochemical cell microscopy (SECCM) system with a single barrel nanopipette [2]. The SECCM uses a meniscus as a nanoscale electrochemical cell simulator which created between the sample and nanopipette. Further, our recent progress of nanoscale electrochemical imaging will be presented on battery electrodes and two dimensional materials for electrocatalyst [3-4].
References:
[1] Y. Takahashi et al., Anal.Chem., 2017, 89, 342.
[2] Y. Takahashi et al., Nature Commun., 2014, 5, 6450.
[3] A. Kumatani et al., Surf. Interface Anal. in press.
[4] A. Kumatani et al., submitted.
