Understanding the Impacts of Li Stripping Overpotentials at the Counter Electrode by Three-Electrode Coin Cell Measurements

Jeesoo Seok, Cara N. Gannett, Seung Ho Yu, Héctor D. Abruña

    Research output: Contribution to journalArticlepeer-review

    21 Citations (Scopus)

    Abstract

    The evaluation of new materials, interfaces, and architectures for battery applications are routinely conducted in two-electrode coin cell experiments, which although convenient, can lead to misrepresentations of the processes occurring in the cell. Few three-electrode coin cell designs have been reported, but those which have involve complex cell assembly, specialized equipment, and/or cell configurations which vary drastically from the standard coin cell environment. Herein, we present a novel, facile three-electrode coin cell design which can be easily assembled with existing coin cell parts and which accurately reproduces the environment of traditional coin cells. Using this design, we systematically investigated the inaccuracies incurred in two-electrode measurements in both symmetric/asymmetric cells and half-cell experiments by galvanostatic charge/discharge, galvanostatic intermittent titration technique (GITT), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry. From our investigation, we reveal that lithium metal stripping contributes larger overpotentials than its nucleation/plating processes, a phenomenon which is often misinterpreted in two-electrode cell measurements.

    Original languageEnglish
    Pages (from-to)15459-15467
    Number of pages9
    JournalAnalytical chemistry
    Volume93
    Issue number46
    DOIs
    Publication statusPublished - 2021 Nov 23

    Bibliographical note

    Funding Information:
    This work made use of the Cornell Center for Materials Research Shared Facilities which are supported through the NSF MRSEC program (DMR-1719875). C.N.G. and H.D.A. would like to thank Mercedes Benz for funding. S.-H.Y. acknowledges the support by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2020R1C1C1012308) and by Technology Development Program to Solve Climate Changes through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (NRF-2021M1A2A2038137).

    Publisher Copyright:
    © 2021 American Chemical Society.

    ASJC Scopus subject areas

    • Analytical Chemistry

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