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Understanding of th...
Understanding of the Electrochemical Behavior of Lithium at Bilayer-Patched Epitaxial Graphene/4H-SiC
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- Shtepliuk, Ivan (author)
- Linköpings universitet,Linköping University,Halvledarmaterial,Tekniska fakulteten
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- Vagin, Mikhail (author)
- Linköpings universitet,Linköping University,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Khan, Ziyauddin (author)
- Linköpings universitet,Linköping University,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Zakharov, Alexei A. (author)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,Lund Univ, Sweden
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- Iakimov, Tihomir (author)
- Linköpings universitet,Linköping University,Halvledarmaterial,Tekniska fakulteten
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- Giannazzo, Filippo (author)
- CNR Institute for Microelectronics and Microsystems (IMM-CNR),CNR, Italy
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- Ivanov, Ivan Gueorguiev (author)
- Linköpings universitet,Linköping University,Halvledarmaterial,Tekniska fakulteten
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- Yakimova, Rositsa (author)
- Linköpings universitet,Linköping University,Halvledarmaterial,Tekniska fakulteten
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(creator_code:org_t)
- 2022-06-29
- 2022
- English.
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In: Nanomaterials. - : MDPI AG. - 2079-4991. ; 12:13
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Keyword
- chronoamperometry
- cyclic voltammetry
- epitaxial graphene
- lithium
- Raman
- SiC
- lithium; SiC; epitaxial graphene; cyclic voltammetry; Raman; chronoamperometry
Publication and Content Type
- art (subject category)
- ref (subject category)
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