Energy Storage Science and Technology ›› 2017, Vol. 6 ›› Issue (1): 1-10.doi: 10.12028/j.issn.2095-4239.2016.0017

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Research progresses of the analytical applications of scanning electrochemical microscopy in Li-ion batteries

WANG Yujiao1, WANG Wei1, FENG Pingyuan1, WANG Kangli2, CHENG Shijie2, JIANG Kai1,2     

  1. 1State Key Laboratory of Materials Processing and Die & Mould Technology, College of Materials Science and Engineering;
    2 State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
  • Received:2016-05-10 Revised:2016-05-26 Online:2017-01-03 Published:2017-01-03

Abstract: Scanning electrochemical microscopy (SECM) is a kind of in-situ analysis technology based on electrochemical principle of ultra-micro electrode. It used the ultra-micro-disc electrode which can move toward three dimensional directions as working probe immersed in the electrolyte solution. As scanning at a few micro meters from the basal position, the varied probe currents can reflect the morphology and properties of the substrate. SECM has several operations modes, and benefit from fast electrochemical responses with high spatial and temporal resolution at non-invasive detection mode, which enables the technology applicated in analysis of Li-ion batteries. This paper mainly introduced the theory and working modes of SECM, and reviewed the research progresses of in situ analysis of SECM in cathode and anode materials in lithium ion batteries. Particularly, SECM analysis of cathode materials mainly focused on kinetics of intercalation/deintercalation of Li+ and its mechanism during charging/discharging processes. On the anode side, the progress of SECM applications in the formation processes and properties of solid electrolyte interface (SEI) are mainly reviewed in this paper.

Key words: scanning electrochemical microscopy, Li-ion batteries, in situ analysis