Carbons Derived from Regenerated Spherical Cellulose as Anodes for Li‐Ion Batteries at Elevated Temperatures

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Johanna Fischer - , Professur für Holz- und Pflanzenchemie, Leibniz Institute for Solid State and Materials Research Dresden (Autor:in)
  • Lisa Wolfram - , Leibniz Institute for Solid State and Materials Research Dresden (Autor:in)
  • Steffen Oswald - , Leibniz Institute for Solid State and Materials Research Dresden (Autor:in)
  • Steffen Fischer - , Professur für Holz- und Pflanzenchemie (Autor:in)
  • Daria Mikhailova - , Leibniz Institute for Solid State and Materials Research Dresden (Autor:in)

Abstract

Biomass-based materials have emerged as a promising alternative to the conventional graphite anode in Li-ion batteries due to their renewability, low cost, and environmental friendliness. Therefore, a facile synthesis method for porous hard carbons based on cellulose acetate microspheres and bead cellulose is used, and their application as anode materials in Li-ion batteries is discussed. The resulting porous carbons exhibit promising electrochemical characteristics, including a reversible capacity of about 300 mAh g−1 at 0.1 C (37 mA g−1) after 50 cycles, and stable capacities up to 210 mAh g−1 over 1000 cycles at 1 C (372 mA g−1) in half-cells for cellulose acetate microspheres carbonised at 1200 °C. Moreover, at 60 °C cellulose-derived carbons show higher specific capacities than graphite (300 mAh g−1 vs 240 mAh g−1 at 1 C after 500 cycles), indicating their potential for use in high-temperature applications. The different charge storage mechanisms of the prepared hard carbon materials and graphite are observed. While capacity of graphite is mainly controlled by the Faradaic redox process, the cellulose-derived carbons combine Faradaic intercalation and capacitive charge adsorption.

Details

OriginalspracheEnglisch
Aufsatznummere202300833
FachzeitschriftChemPhysChem
Jahrgang25
Ausgabenummer8
PublikationsstatusVeröffentlicht - 16 Apr. 2024
Peer-Review-StatusJa

Externe IDs

Scopus 85185144713
Mendeley 8eb819a6-41e5-3be7-b4d5-fd90945df541

Schlagworte

Schlagwörter

  • cellulose, energy storage mechanism, hard carbon, high temperature, li-ion batteries