Skip to main content

High-performance sodium-ion batteries and sodium-ion pseudocapacitors based on MoS2/graphene composites

Journal Article


Download full-text (Open Access)

Abstract


  • Sodium-ion energy storage, including sodium-ion batteries (NIBs) and electrochemical capacitive storage (NICs), is considered as a promising alternative to lithium-ion energy storage. It is an intriguing prospect, especially for large-scale applications, owing to its low cost and abundance. MoS2 sodiation/desodiation with Na ions is based on the conversion reaction, which is not only able to deliver higher capacity than the intercalation reaction, but can also be applied in capacitive storage owing to its typically sloping charge/discharge curves. Here, NIBs and NICs based on a graphene composite (MoS2/G) were constructed. The enlarged d-spacing, a contribution of the graphene matrix, and the unique properties of the MoS2/G substantially optimize Na storage behavior, by accommodating large volume changes and facilitating fast ion diffusion. MoS2/G exhibits a stable capacity of approximately 350 mAh g−1 over 200 cycles at 0.25 C in half cells, and delivers a capacitance of 50 F g−1 over 2000 cycles at 1.5 C in pseudocapacitors with a wide voltage window of 0.1–2.5 V.

Publication Date


  • 2014

Citation


  • Wang, Y., Chou, S., Wexler, D., Liu, H. & Dou, S. (2014). High-performance sodium-ion batteries and sodium-ion pseudocapacitors based on MoS2/graphene composites. Chemistry: A European Journal, 20 (31), 9607-9612.

Scopus Eid


  • 2-s2.0-84905637817

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2137&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1136

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 9607

End Page


  • 9612

Volume


  • 20

Issue


  • 31

Place Of Publication


  • Germany

Abstract


  • Sodium-ion energy storage, including sodium-ion batteries (NIBs) and electrochemical capacitive storage (NICs), is considered as a promising alternative to lithium-ion energy storage. It is an intriguing prospect, especially for large-scale applications, owing to its low cost and abundance. MoS2 sodiation/desodiation with Na ions is based on the conversion reaction, which is not only able to deliver higher capacity than the intercalation reaction, but can also be applied in capacitive storage owing to its typically sloping charge/discharge curves. Here, NIBs and NICs based on a graphene composite (MoS2/G) were constructed. The enlarged d-spacing, a contribution of the graphene matrix, and the unique properties of the MoS2/G substantially optimize Na storage behavior, by accommodating large volume changes and facilitating fast ion diffusion. MoS2/G exhibits a stable capacity of approximately 350 mAh g−1 over 200 cycles at 0.25 C in half cells, and delivers a capacitance of 50 F g−1 over 2000 cycles at 1.5 C in pseudocapacitors with a wide voltage window of 0.1–2.5 V.

Publication Date


  • 2014

Citation


  • Wang, Y., Chou, S., Wexler, D., Liu, H. & Dou, S. (2014). High-performance sodium-ion batteries and sodium-ion pseudocapacitors based on MoS2/graphene composites. Chemistry: A European Journal, 20 (31), 9607-9612.

Scopus Eid


  • 2-s2.0-84905637817

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2137&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1136

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 9607

End Page


  • 9612

Volume


  • 20

Issue


  • 31

Place Of Publication


  • Germany