Chemically Prelithiated Graphene for Anode of Li-Ion Batteries
2020
To
improve the reversible capacity and electrochemical performance
of the Li-ion batteries, prelithiation is one of the promising solutions
as it leads to the reduction of irreversible capacity and stabilization
of electrode surfaces after prelithiation. However, typical electrochemical
prelithiation has drawbacks including a longer reaction period and
low efficiency of the process. Here, we demonstrate a facile route
for the one-pot synthesis of chemically prelithiated graphene before
assembling the battery cell. In the reaction of a mixture consisting
of graphene oxide (GO), lithium, and 4,4′-di-tert-butylbiphenyl (DTBP), the prelithiation and reduction of GO have
occurred simultaneously by the assistance of DTBP. The prelithiated
graphene exhibits improved reversible capacity (643 mAh g–1), cyclic stability (capacity retention of 87.4% after 200th cycle),
and rate capability compared to those of GO and reduced graphene oxide
(RGO). This chemical prelithiation method is expected to enable the
efficient production of prelithiated graphene anodes for improving
the performance of Li-ion batteries.
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
53
References
4
Citations
NaN
KQI