Inhibition of lithium dendrite formation in lithium metal batteries via regulated cation transport through ultrathin sub‐nanometer porous carbon nanomembranes
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Date
2021-08
Authors
Rajendran, Sathish
Tang, Zian
George, Antony
Cannon, Andrew
Neumann, Christof
Sawas, Abdulrazzag
Ryan, Emily
Turchanin, Andrey
Arava, Leela Mohana Reddy
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Published version
OA Version
Citation
S. Rajendran, Z. Tang, A. George, A. Cannon, C. Neumann, A. Sawas, E. Ryan, A. Turchanin, L.M.R. Arava. 2021. "Inhibition of Lithium Dendrite Formation in Lithium Metal Batteries via Regulated Cation Transport through Ultrathin Sub‐Nanometer Porous Carbon Nanomembranes." Advanced Energy Materials, Volume 11, Issue 29, pp. 2100666 - 2100666. https://doi.org/10.1002/aenm.202100666
Abstract
Suppressing Li dendrite growth has gained research interest due to the high theoretical capacity of Li metal anodes. Traditional Celgard membranes which are currently used in Li metal batteries fall short in achieving uniform Li flux at the electrode/electrolyte interface due to their inherent irregular pore sizes. Here, the use of an ultrathin (≈1.2 nm) carbon nanomembrane (CNM) which contains sub-nanometer sized pores as an interlayer to regulate the mass transport of Li-ions is demonstrated. Symmetrical cell analysis reveals that the cell with CNM interlayer cycles over 2x longer than the control experiment without the formation of Li dendrites. Further investigation on the Li plating morphology on Cu foil reveals highly dense deposits of Li metal using a standard carbonate electrolyte. A smoothed-particle hydrodynamics simulation of the mass transport at the anode–electrolyte interface elucidates the effect of the CNM in promoting the formation of highly dense Li deposits and inhibiting the formation of dendrites. A lithium metal battery fabricated using the LiFePO4 cathode exhibits a stable, flat voltage profile with low polarization for over 300 cycles indicating the effect of regulated mass transport.
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© 2021 The Authors. Advanced Energy Materials published by WileyVCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.