TY - JOUR
T1 - Understanding the Impacts of Li Stripping Overpotentials at the Counter Electrode by Three-Electrode Coin Cell Measurements
AU - Seok, Jeesoo
AU - Gannett, Cara N.
AU - Yu, Seung Ho
AU - Abruña, Héctor D.
N1 - 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.
PY - 2021/11/23
Y1 - 2021/11/23
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85119345329&partnerID=8YFLogxK
U2 - 10.1021/acs.analchem.1c03422
DO - 10.1021/acs.analchem.1c03422
M3 - Article
AN - SCOPUS:85119345329
SN - 0003-2700
VL - 93
SP - 15459
EP - 15467
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 46
ER -