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Ionothermal synthesis of activated carbon from waste PET bottles as anode materials for lithium-ion batteries

Ehi-Eromosele, Cyril O. 1; Onwucha, Chizoom N. 1; Ajayi, Samuel O. 1; Melinte, Georgian 2; Hansen, Anna-Lena 1; Indris, Sylvio ORCID iD icon 3; Ehrenberg, Helmut 3
1 Institut für Angewandte Materialien (IAM), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
3 Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS), Karlsruher Institut für Technologie (KIT)


Waste polyethylene terephthalate (PET) bottles have become a significant post-consumer plastic waste with attendant environmental problems. Hence, ionothermal synthesis has been used to prepare activated carbon (AC) anode materials from waste PET for both high performance and sustainable lithium-ion batteries (LIB). Particularly, using choline chloride deep eutectic salts (CU-DES) does not require post-synthesis washing and thereby reduces the complexity of the process and produces materials with unique low-surface area, higher levels of graphitization/ordering, and high nitrogen doping in the obtained ACs. The results show that the AC produced using CU-DES (PET-CU-A-ITP2) gave good electrochemical performance. Even though the material possesses a low surface area (∼23 m2 g−1), it displays a gravimetric capacity (GC) of ∼460 mA h g−1 and a coulombic efficiency (CE) of ∼53% in the 1st cycle and very good cycling performance with a capacity retention of 98% from the 2nd to the 100th cycle. The superior electrochemical performance of the PET-CU-A-ITP2 anode was found to be due to its better graphitization/ordering and dense structure which results in higher capacity, formation of less solid electrolyte interphase, and higher CE. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000153928
Veröffentlicht am 19.12.2022
DOI: 10.1039/d2ra06786b
Zitationen: 7
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST)
Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS)
Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 29.11.2022
Sprache Englisch
Identifikator ISSN: 2046-2069
KITopen-ID: 1000153928
HGF-Programm 38.01.03 (POF IV, LK 01) Cell Design and Development
Weitere HGF-Programme 43.35.03 (POF IV, LK 01) Structural and Functional Behavior of Solid State Systems
Erschienen in RSC Advances
Verlag Royal Society of Chemistry (RSC)
Band 12
Heft 53
Seiten 34670–34684
Schlagwörter 2018-020-022249 TEM
Nachgewiesen in Dimensions
Web of Science
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