DOAJ Open Access 2019

Reduced Graphene Oxide Wrapped Sulfur/Polypyrrole Composite Cathode with Enhanced Cycling and Rate Performance for Lithium/Sulfur Batteries

Guanghui Yuan Huafeng Jin Yan Zhao

Abstrak

An innovative reduced graphene oxide wrapped sulfur/polypyrrole (S/PPy@RGO) composite is synthesized via a one-pot polymerization of pyrrole monomer in a sulfur/reduced graphene oxide aqueous suspension. This one-pot preparation method is efficient through its inherent simplicity and low cost. The resultant S/PPy@RGO composite was characterized via EDS, XRD, SEM, TEM and electrochemical measurements. In the S/PPy@RGO ternary composite, reduced graphene oxide played a crucial role of coating a thin layer to trap soluble polysulfide intermediates, provide a continuous electrically conducting network and accommodate volume expansion. Meanwhile polypyrrole with its high absorptivity, joins sulfur and RGO as a binding agent, and tether polysulfides into its porous framework. Therefore, the synthesized S/PPy@RGO composite delivers excellent rate ability and highly cycling stability. This composite can retain a specific discharge capacity of 615.3 mAh g-1 at 0.2C, even after 100 cycles.

Topik & Kata Kunci

Industrial electrochemistry Physical and theoretical chemistry

Penulis (3)

Guanghui Yuan

Huafeng Jin

Yan Zhao

Format Sitasi

APA MLA BibTeX

Yuan, G., Jin, H., Zhao, Y. (2019). Reduced Graphene Oxide Wrapped Sulfur/Polypyrrole Composite Cathode with Enhanced Cycling and Rate Performance for Lithium/Sulfur Batteries. https://doi.org/10.20964/2019.02.45

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Informasi Jurnal

Tahun Terbit: 2019
Sumber Database: DOAJ
DOI: 10.20964/2019.02.45
Akses: Open Access ✓