Novel synthesis and electrochemical investigations of ZnO/C composites for lithium-ion batteries
For the first time, ZnO/C composites were synthesized using zinc glycerolate as a precursor through one-step calcination under a nitrogen atmosphere. The effect of the heat treatment conditions on the structure, composition, morphology as well as on the electrochemical properties regarding applicati...
Gespeichert in:
Veröffentlicht in: | Journal of materials science 2021-08, Vol.56 (23), p.13227-13242 |
---|---|
Hauptverfasser: | , , , , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | For the first time, ZnO/C composites were synthesized using zinc glycerolate as a precursor through one-step calcination under a nitrogen atmosphere. The effect of the heat treatment conditions on the structure, composition, morphology as well as on the electrochemical properties regarding application in lithium-ion batteries are investigated. The products obtained by calcination of the precursor in nitrogen at 400—800 °C consist of zinc oxide nanoparticles and amorphous carbon that is
in-situ
generated from organic components of the glycerolate precursor. When used as anode material for lithium-ion batteries, the as-prepared ZnO/C composite synthesized at a calcination temperature of 700 °C delivers initial discharge and charge capacities of 1061 and 671 mAh g
−1
at a current rate of 100 mA g
−1
and hence 1.5 times more than bare ZnO, which reaches only 749/439 mAh g
−1
. The native carbon improves the conductivity, allowing efficient electronic conductivity and Li-ion diffusion. By means of
ex-situ
XRD studies a two-step storage mechanism is proven. |
---|---|
ISSN: | 0022-2461 1573-4803 |
DOI: | 10.1007/s10853-021-06125-4 |