Application notes 18 min read

ac-SECM to investigate battery electrode materials in non-aqueous electrolyte – Scanning Probes – Application Note 7

Latest updated: May 6, 2020

Abstract

Unlike dc-SECM, ac-SECM does not require the use of a redox mediator or the addition of an electrolyte salt as what is studied is the impedance of the probe. This makes ac-SECM particularly useful for corrosion applications, where the redox mediator can interact with the substrate and for battery applications, where organic electrolytes of low conductivity are commonly used.

Introduction

Energy storage is a growing field of interest for SECM applications. This note demonstrates one particular example of the use of SECM in this field. ac-SECM has been used to investigate the electrochemical activity and topography of a battery electrode provided by Sion Power. This measurement was performed in tetrabutylammonium perchlorate (TBA-ClO4) in propylene carbonate (PC).

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