Back to Search
Start Over
Microwave-Assisted Coal-Derived Few-Layer Graphene as an Anode Material for Lithium-Ion Batteries
- Source :
- Materials, Volume 14, Issue 21, Materials, Vol 14, Iss 6468, p 6468 (2021)
- Publication Year :
- 2021
-
Abstract
- A few-layer graphene (FLG) composite material was synthesized using a rich reservoir and low-cost coal under the microwave-assisted catalytic graphitization process. X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy were used to evaluate the properties of the FLG sample. A well-developed microstructure and higher graphitization degree were achieved under microwave heating at 1300 °C using the S5% dual (Fe-Ni) catalyst for 20 min. In addition, the synthesized FLG sample encompassed the Raman spectrum 2D band at 2700 cm−1, which showed the existence of a few-layer graphene structure. The high-resolution TEM (transmission electron microscopy) image investigation of the S5% Fe-Ni sample confirmed that the fabricated FLG material consisted of two to seven graphitic layers, promoting the fast lithium-ion diffusion into the inner surface. The S5% Fe-Ni composite material delivered a high reversible capacity of 287.91 mAhg−1 at 0.1 C with a higher Coulombic efficiency of 99.9%. In contrast, the single catalyst of S10% Fe contained a reversible capacity of 260.13 mAhg−1 at 0.1 C with 97.96% Coulombic efficiency. Furthermore, the dual catalyst-loaded FLG sample demonstrated a high capacity—up to 95% of the initial reversible capacity retention—after 100 cycles. This study revealed the potential feasibility of producing FLG materials from bituminous coal used in a broad range as anode materials for lithium-ion batteries (LIBs).
- Subjects :
- Technology
Materials science
microwave
lithium-ion batteries
chemistry.chemical_element
Article
law.invention
symbols.namesake
catalytic graphitization
X-ray photoelectron spectroscopy
law
General Materials Science
coal
Microscopy
QC120-168.85
Graphene
QH201-278.5
Microstructure
Engineering (General). Civil engineering (General)
Anode
TK1-9971
few-layer graphene
Chemical engineering
chemistry
Descriptive and experimental mechanics
Transmission electron microscopy
symbols
Lithium
Electrical engineering. Electronics. Nuclear engineering
TA1-2040
Raman spectroscopy
Faraday efficiency
Subjects
Details
- ISSN :
- 19961944
- Volume :
- 14
- Issue :
- 21
- Database :
- OpenAIRE
- Journal :
- Materials (Basel, Switzerland)
- Accession number :
- edsair.doi.dedup.....0d34f6be31956cab8d9b16ce9ba17507