van der Waals gap modulation of graphene oxide through mono-Boc ethylenediamine anchoring for superior Li-ion batteries.
| Autor: | Mandal S; Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati Andhra Pradesh 517507 India vijay@iisertirupati.ac.in., Pillai VK; Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati Andhra Pradesh 517507 India vijay@iisertirupati.ac.in., Ranjana Ponraj M; Department of Applied Chemistry, Karunya Institute of Technology and Sciences Coimbatore Tamil Nadu 641114 India jebasinghb@karunya.edu., K M T; Department of Applied Chemistry, Karunya Institute of Technology and Sciences Coimbatore Tamil Nadu 641114 India jebasinghb@karunya.edu., Bhagavathsingh J; Department of Applied Chemistry, Karunya Institute of Technology and Sciences Coimbatore Tamil Nadu 641114 India jebasinghb@karunya.edu., Grage SL; Karlsruhe Institute of Technology, Institute of Biological Interfaces IBG-2 P.O. Box 3640 76021 Karlsruhe Germany., Peng X; College of Integrative Sciences and Arts, Arizona State University Mesa AZ 85212 USA., Kang JW; Laser Biomedical Research Centre, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA., Liepmann D; Department of Bioengineering, University of California 80 Hearst Memorial Mining Bldg. Berkeley CA 94720 USA., Kannan ANM; The Polytechnic School, Ira A. Fulton Schools of Engineering, Arizona State University Mesa AZ 85212 USA., Thavasi V; Center for Quantum Research and Technology, The University of Oklahoma 440 W. Brooks Street Normon OK 73019 USA., Renugopalakrishnan V; Department of Chemistry, Boston Children's Hospital, Harvard Medical School, MGB Center for COVID Innovation, Northeastern University Boston MA 02115 USA. |
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| Jazyk: | angličtina |
| Zdroj: | Energy advances [Energy Adv] 2024 Jun 21; Vol. 3 (8), pp. 1977-1991. Date of Electronic Publication: 2024 Jun 21 (Print Publication: 2024). |
| DOI: | 10.1039/d4ya00217b |
| Abstrakt: | Li-ion batteries stand out among energy storage systems due to their higher energy and power density, cycle life, and high-rate performance. Development of advanced, high-capacity anodes is essential for enhancing their performance, safety, and durability, and recently, two-dimensional materials have garnered extensive attention in this regard due to distinct properties, particularly their ability to modulate van der Waals gap through intercalation. Covalently intercalated Graphene oxide interlayer galleries with mono-Boc-ethylenediamine (GO-EnBoc) was synthesized via the ring opening of epoxide, forming an amino alcohol moiety. This creates three coordination sites for Li ion exchange on the graphene oxide nanosheets' surface. Consequently, the interlayer d -spacing expands from 8.47 Å to 13.17 Å, as anticipated. When explored as an anode, Li-GO-EnBoc shows a significant enhancement in the stable and reversible capacity of 270 mA h g -1 at a current density of 25 mA g -1 compared to GO (80 mA h g -1 ), without compromising the mechanical or chemical stability. Through 13 C, 7 Li and 6 Li MAS NMR, XPS, IR, Raman microscopy, and density functional theory (DFT) calculations, we confirm the positioning of Li + ions at multiple sites of the interlayer gallery, which enhances the electrochemical performance. Our findings suggest that these novel systematically modulated van der Waals gap GO-engineered materials hold promise as efficient anodes for Li-ion batteries. Competing Interests: The authors are not involved in conflict of interest. (This journal is © The Royal Society of Chemistry.) |
| Databáze: | MEDLINE |
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