Understanding of the Electrochemical Behavior of Lithium at Bilayer-Patched Epitaxial Graphene/4H-SiC
(2022) In Nanomaterials 12(13).- Abstract
Novel two-dimensional materials (2DMs) with balanced electrical conductivity and lithium (Li) storage capacity are desirable for next-generation rechargeable batteries as they may serve as high-performance anodes, improving output battery characteristics. Gaining an advanced understanding of the electrochemical behavior of lithium at the electrode surface and the changes in interior structure of 2DM-based electrodes caused by lithiation is a key component in the long-term process of the implementation of new electrodes into to a realistic device. Here, we showcase the advantages of bilayer-patched epitaxial graphene on 4H-SiC (0001) as a possible anode material in lithium-ion batteries. The presence of bilayer graphene patches is... (More)
Novel two-dimensional materials (2DMs) with balanced electrical conductivity and lithium (Li) storage capacity are desirable for next-generation rechargeable batteries as they may serve as high-performance anodes, improving output battery characteristics. Gaining an advanced understanding of the electrochemical behavior of lithium at the electrode surface and the changes in interior structure of 2DM-based electrodes caused by lithiation is a key component in the long-term process of the implementation of new electrodes into to a realistic device. Here, we showcase the advantages of bilayer-patched epitaxial graphene on 4H-SiC (0001) as a possible anode material in lithium-ion batteries. The presence of bilayer graphene patches is beneficial for the overall lithiation process because it results in enhanced quantum capacitance of the electrode and provides extra intercalation paths. By performing cyclic voltammetry and chronoamperometry measurements, we shed light on the redox behavior of lithium at the bilayer-patched epitaxial graphene electrode and find that the early-stage growth of lithium is governed by the instantaneous nucleation mechanism. The results also demonstrate the fast lithium-ion transport (~4.7–5.6 × 10−7 cm2·s−1) to the bilayer-patched epitaxial graphene electrode. Raman measurements complemented by in-depth statistical analysis and density functional theory calculations enable us to comprehend the lithiation effect on the properties of bilayer-patched epitaxial graphene and ascribe the lithium intercalation-induced Raman G peak splitting to the disparity between graphene layers. The current results are helpful for further advancement of the design of graphene-based electrodes with targeted performance.
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- author
- Shtepliuk, Ivan ; Vagin, Mikhail ; Khan, Ziyauddin ; Zakharov, Alexei A. LU ; Iakimov, Tihomir ; Giannazzo, Filippo ; Ivanov, Ivan G. and Yakimova, Rositsa
- organization
- publishing date
- 2022-07-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- chronoamperometry, cyclic voltammetry, epitaxial graphene, lithium, Raman, SiC
- in
- Nanomaterials
- volume
- 12
- issue
- 13
- article number
- 2229
- publisher
- MDPI AG
- external identifiers
-
- scopus:85132991690
- pmid:35808065
- ISSN
- 2079-4991
- DOI
- 10.3390/nano12132229
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
- id
- 5a4172e4-8ee4-402b-8559-db52e8089d8f
- date added to LUP
- 2022-09-29 14:55:31
- date last changed
- 2024-06-27 21:12:44
@article{5a4172e4-8ee4-402b-8559-db52e8089d8f,
abstract = {{<p>Novel two-dimensional materials (2DMs) with balanced electrical conductivity and lithium (Li) storage capacity are desirable for next-generation rechargeable batteries as they may serve as high-performance anodes, improving output battery characteristics. Gaining an advanced understanding of the electrochemical behavior of lithium at the electrode surface and the changes in interior structure of 2DM-based electrodes caused by lithiation is a key component in the long-term process of the implementation of new electrodes into to a realistic device. Here, we showcase the advantages of bilayer-patched epitaxial graphene on 4H-SiC (0001) as a possible anode material in lithium-ion batteries. The presence of bilayer graphene patches is beneficial for the overall lithiation process because it results in enhanced quantum capacitance of the electrode and provides extra intercalation paths. By performing cyclic voltammetry and chronoamperometry measurements, we shed light on the redox behavior of lithium at the bilayer-patched epitaxial graphene electrode and find that the early-stage growth of lithium is governed by the instantaneous nucleation mechanism. The results also demonstrate the fast lithium-ion transport (~4.7–5.6 × 10<sup>−7</sup> cm<sup>2·s−1</sup>) to the bilayer-patched epitaxial graphene electrode. Raman measurements complemented by in-depth statistical analysis and density functional theory calculations enable us to comprehend the lithiation effect on the properties of bilayer-patched epitaxial graphene and ascribe the lithium intercalation-induced Raman G peak splitting to the disparity between graphene layers. The current results are helpful for further advancement of the design of graphene-based electrodes with targeted performance.</p>}},
author = {{Shtepliuk, Ivan and Vagin, Mikhail and Khan, Ziyauddin and Zakharov, Alexei A. and Iakimov, Tihomir and Giannazzo, Filippo and Ivanov, Ivan G. and Yakimova, Rositsa}},
issn = {{2079-4991}},
keywords = {{chronoamperometry; cyclic voltammetry; epitaxial graphene; lithium; Raman; SiC}},
language = {{eng}},
month = {{07}},
number = {{13}},
publisher = {{MDPI AG}},
series = {{Nanomaterials}},
title = {{Understanding of the Electrochemical Behavior of Lithium at Bilayer-Patched Epitaxial Graphene/4H-SiC}},
url = {{http://dx.doi.org/10.3390/nano12132229}},
doi = {{10.3390/nano12132229}},
volume = {{12}},
year = {{2022}},
}