Background:
As an emerging carbon nanomaterial, graphene quantum dots (GQDs) have shown great potential
application in new energy storage devices due to their unique small size effect and abundant edge active sites. This work
introduces the main synthesis strategies of GQDs, which includes top-down and bottom-up methods; the application
examples of GQDs and GQDs-based composites in energy storage are reviewed, and more, the unique advantages of
GQDs are used in supercapacitors, Lithium-ion batteries (LIBs) and Lithium-sulfur batteries (Li–S batteries) are
highlighted. The problems and development prospects in this growing area are also discussed.
Method:
We conducted a detailed search of “the application of GQDs in energy storage devices” in the published papers
and the public patents based on Web of Science database in the period from 2014 to 2020. The corresponding literature
was carefully evaluated and analyzed.
Results:
Sixty papers and twenty-eight recent patents were included in this mini-review. The significant advances in the
recent years are summarized with comparative and balanced discussion. Thanks to the unique properties of large specific
surface area, high conductivity and abundant active sites, GQDs have unparalleled potential application for new energy
storage, especially improving the specific capacity and cycle stability of supercapacitors, LIBs and Li-S batteries.
Conclusion:
The findings of this mini-review confirm the importance of GQDs, show the enhanced electrochemical
performance in supercapacitors, LIBs and Li-S batteries, and also provide a helpful guide to design and fabricate highefficiency electrode materials.
Biocompatibility and toxicity of graphene quantum dots for potential application in photodynamic therapy
