In:
Batteries & Supercaps, Wiley, Vol. 2, No. 1 ( 2019-01), p. 49-54
Kurzfassung:
Graphene‐doped Fe 3 O 4 monodispersed microspheres are fabricated utilizing a droplet microfluidic technology. The electrochemical performance of the Fe 3 O 4 microspheres as anode material for Li‐ion batteries is enhanced by doping trace graphene in the droplet reactor. The discharge capacity remains 550 mAh/g at 0.1 C after 190 cycles, which is 2 times higher than that of the graphene doped Fe 3 O 4 samples prepared by the traditional precipitation method, and 5 times higher than that of pure Fe 3 O 4 after 100 cycles. The uniform droplet reactor in form of a droplet microfluidic chip might provide a homogeneous microscopic condition for in‐situ electrostatic co‐assembly of the positive‐charged Fe colloids and the negative‐charged graphene oxide sheets to shape a homogeneous solid framework, resulting in homogeneously doping trace graphene into the Fe 3 O 4 microspheres.
Materialart:
Online-Ressource
ISSN:
2566-6223
,
2566-6223
DOI:
10.1002/batt.201800072
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2019
ZDB Id:
2897248-X