Increasing the Pressure‐Free Stripping Capacity of the Lithium Metal Anode in Solid‐State‐Batteries by Carbon Nanotubes
Abstract
Abstract Lithium metal is the key anode material for solid‐state‐batteries as its successful implementation will drastically increase their energy and power densities. However, anode contact loss during stripping leads to dendrites upon plating and subsequent cell failure. Design strategies to mitigate these issues are crucial to enable the use of lithium metal anodes. This paper reports the dissolution kinetics of composite anodes made of lithium metal and carbon nanotubes (CNTs) with a garnet‐type solid electrolyte (SE). In addition to an enhancement of the effective diffusion within the anode, its dissolution is fundamentally changed from being 2D to 3D. By maintaining contact with the SE, the CNTs facilitate lithium transport to the interface, which yields more than 20 mAh cm −2 discharge capacity at 100 µ A cm −2 without the application of external stack pressure ( > 1 MPa). Conclusions drawn from electrochemical data on the anode microstructure are validated using cryo‐focused‐ion‐beam scanning electron microscopy and correlated with the mechanical properties. Micro‐indentation, acoustic analysis, and stress–strain testing show that mechanical properties of the anode, like yield strength and hardness, are adjustable. Overall, it is shown that the mechanical and electrochemical properties of Li–CNT composite electrodes can be tailored to suit the requirements of amore »
- Authors:
-
- Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 D‐35392 Giessen Germany, Center for Materials Research (ZfM) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 D‐35392 Giessen Germany
- Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48109 USA, Department of Mechanical Engineering University of Michigan Ann Arbor MI 48109 USA
- Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48109 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1876109
- Alternate Identifier(s):
- OSTI ID: 1876111
- Resource Type:
- Published Article
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Name: Advanced Energy Materials Journal Volume: 12 Journal Issue: 26; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Fuchs, Till, Haslam, Catherine G., Moy, Alexandra C., Lerch, Christian, Krauskopf, Thorben, Sakamoto, Jeff, Richter, Felix H., and Janek, Jürgen. Increasing the Pressure‐Free Stripping Capacity of the Lithium Metal Anode in Solid‐State‐Batteries by Carbon Nanotubes. Germany: N. p., 2022.
Web. doi:10.1002/aenm.202201125.
Fuchs, Till, Haslam, Catherine G., Moy, Alexandra C., Lerch, Christian, Krauskopf, Thorben, Sakamoto, Jeff, Richter, Felix H., & Janek, Jürgen. Increasing the Pressure‐Free Stripping Capacity of the Lithium Metal Anode in Solid‐State‐Batteries by Carbon Nanotubes. Germany. https://doi.org/10.1002/aenm.202201125
Fuchs, Till, Haslam, Catherine G., Moy, Alexandra C., Lerch, Christian, Krauskopf, Thorben, Sakamoto, Jeff, Richter, Felix H., and Janek, Jürgen. Tue .
"Increasing the Pressure‐Free Stripping Capacity of the Lithium Metal Anode in Solid‐State‐Batteries by Carbon Nanotubes". Germany. https://doi.org/10.1002/aenm.202201125.
@article{osti_1876109,
title = {Increasing the Pressure‐Free Stripping Capacity of the Lithium Metal Anode in Solid‐State‐Batteries by Carbon Nanotubes},
author = {Fuchs, Till and Haslam, Catherine G. and Moy, Alexandra C. and Lerch, Christian and Krauskopf, Thorben and Sakamoto, Jeff and Richter, Felix H. and Janek, Jürgen},
abstractNote = {Abstract Lithium metal is the key anode material for solid‐state‐batteries as its successful implementation will drastically increase their energy and power densities. However, anode contact loss during stripping leads to dendrites upon plating and subsequent cell failure. Design strategies to mitigate these issues are crucial to enable the use of lithium metal anodes. This paper reports the dissolution kinetics of composite anodes made of lithium metal and carbon nanotubes (CNTs) with a garnet‐type solid electrolyte (SE). In addition to an enhancement of the effective diffusion within the anode, its dissolution is fundamentally changed from being 2D to 3D. By maintaining contact with the SE, the CNTs facilitate lithium transport to the interface, which yields more than 20 mAh cm −2 discharge capacity at 100 µ A cm −2 without the application of external stack pressure ( > 1 MPa). Conclusions drawn from electrochemical data on the anode microstructure are validated using cryo‐focused‐ion‐beam scanning electron microscopy and correlated with the mechanical properties. Micro‐indentation, acoustic analysis, and stress–strain testing show that mechanical properties of the anode, like yield strength and hardness, are adjustable. Overall, it is shown that the mechanical and electrochemical properties of Li–CNT composite electrodes can be tailored to suit the requirements of a practical cell.},
doi = {10.1002/aenm.202201125},
journal = {Advanced Energy Materials},
number = 26,
volume = 12,
place = {Germany},
year = {Tue May 31 00:00:00 EDT 2022},
month = {Tue May 31 00:00:00 EDT 2022}
}
https://doi.org/10.1002/aenm.202201125
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