TY - JOUR
T1 - Synthesis of hierarchical porous sulfur/polypyrrole/multiwalled carbon nanotube composite cathode for lithium batteries
AU - Zhang, Yongguang
AU - Zhao, Yan
AU - Bakenov, Zhumabay
AU - Tuiyebayeva, Madina
AU - Konarov, Aishuak
AU - Chen, P.
N1 - Funding Information:
This research was financially supported by Positec, the Natural Sciences and Engineering Research Council of Canada (NSERC), Canadian Foundation for Innovation (CFI) and the Canada Research Chairs (CRC) program. The TEM research described in this paper was performed at the Canadian Centre for Electron Microcsopy at McMaster University, which is supported by NSERC and other government agencies. ZB thanks the support from the Nazarbayev University Research and Innovation Systems (NURIS, Kazakhstan) and a research grant from Nazarbayev University.
PY - 2014/10/10
Y1 - 2014/10/10
N2 - A novel porous sulfur/polypyrrole/multiwalled carbon nanotube composite (S/PPy/MWNT) was synthesized via in situ polymerization of pyrrole monomer with nano-sulfur and MWNT aqueous suspension followed by a low temperature heat-treatment. Scanning electronic microscopy revealed the formation of a highly hierarchical mesoporous and macroporous structure. High resolution transmission electronic microscopy confirmed homogeneous dispersion of S, PPy and MWNT in the composite. In this composite, polypyrrole with its high adhesion ability to MWNT acts as a conductive binder to connect sulfur and MWNT matrix, as well as absorbs polysulfides into its porous structure positively affecting the composite performance as a cathode in a Li/S cell. The resulting S/PPy/MWNT composite cathode exhibited greatly enhanced cyclability and delivered a reversible discharge capacity of 751 mAh g-1 after 100 cycles at 0.2 C.
AB - A novel porous sulfur/polypyrrole/multiwalled carbon nanotube composite (S/PPy/MWNT) was synthesized via in situ polymerization of pyrrole monomer with nano-sulfur and MWNT aqueous suspension followed by a low temperature heat-treatment. Scanning electronic microscopy revealed the formation of a highly hierarchical mesoporous and macroporous structure. High resolution transmission electronic microscopy confirmed homogeneous dispersion of S, PPy and MWNT in the composite. In this composite, polypyrrole with its high adhesion ability to MWNT acts as a conductive binder to connect sulfur and MWNT matrix, as well as absorbs polysulfides into its porous structure positively affecting the composite performance as a cathode in a Li/S cell. The resulting S/PPy/MWNT composite cathode exhibited greatly enhanced cyclability and delivered a reversible discharge capacity of 751 mAh g-1 after 100 cycles at 0.2 C.
KW - Hierarchical porous structure
KW - Lithium/Sulfur battery
KW - Nanostructured sulfur cathode
KW - Sulfur/Polypyrrole/Multiwalled carbon nanotube composite
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U2 - 10.1016/j.electacta.2014.07.148
DO - 10.1016/j.electacta.2014.07.148
M3 - Article
AN - SCOPUS:84906761977
SN - 0013-4686
VL - 143
SP - 49
EP - 55
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -