Single iron atom and nitrogen-codoped carbon (Fe-N-C) electrocatalysts, which have great potential to catalyze the kinetically sluggish oxygen reduction reaction (ORR), have been recognized to be the most promising replacements...
Recently, rechargeable graphene-based aluminum-ion batteries
(AIBs)
as an attractive energy storage system has been studied. Owing to
the requirements such as high conductivity and low defects, the graphene
cathode used in AIBs is typically fabricated using chemical vapor
deposition (CVD). Here, we utilize solution-processable microwave-reduced
graphene oxide (MWrGO) that has been shown to be of very high quality
with low defect density as a cathode in AIBs. Our results show that
it is possible to increase the AlCl4
– ion storage with MWrGO, relative to thermally reduced graphene oxide
(TrGO). The MWrGO film cathode for AIBs shows a stable discharge capacity
of 87.7 mA h g–1 at 0.2 A g–1 with
a coulombic efficiency of >93% and favorable rate capability that
can withstand more than 4500 cycles without capacity decay at a high
current density of 2 A g–1. The relationship between
AlCl4
– ion storage capability and microwave
time has been examined to elucidate the fundamental relationship between
AlCl4
– intercalation and defects in graphene.
We found that improved quality and lowered defects lead to higher
diffusion-controlled contribution arising from the faradaic redox
reaction, also leading to increased AlCl4
– ion storage capability, whereas higher defects of graphene result
in increased electrical double-layer capacity contribution but reduced
AlCl4
– ion storage capability.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.