Journal
SOLID STATE SCIENCES
Volume 66, Issue -, Pages 44-49Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2017.02.009
Keywords
Lithium/sulfur battery; Nanostructured sulfur cathode; PPy nanowire network; S/PPy composite
Funding
- National Natural Science Foundation of China [21406052]
- Program for the Outstanding Young Talents of Hebei Province [BJ2014010]
- Science Rsearch Foundation for Selected Overseas Chinese Scholars, Ministry of Human Resources and Social Security of China [CG2015003002]
- Pearl River S&T Nova Program of Guangzhou [201506040045]
- Ministry of Education and Science of Kazakhstan [4649/GF, 5156GF, 0115PK03029]
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Preparation of novel sulfur/polypyrrole (S/PPy) composite consisting well-dispersed sulfur particles anchored on interconnected PPy nanowire network was demonstrated. In such hybrid structure, the as prepared PPy clearly displays a three-dimensionally cross-linked and hierarchical porous structure, which was utilized in the composite cathode as a conductive network trapping soluble polysulfide intermediates and enhancing the overall electrochemical performance of the system. Benefiting from this unique structure, the S/PPy composite demonstrated excellent cycling stability, resulting in a discharge capacity of 931 mAh g(-1) at the second cycle and retained about 54% of this value over 100 cycles at 0.1 C. Furthermore, the S/PPy composite cathode exhibits a good rate capability with a discharge capacity of 584 mAh g(-1) at 1 degrees C. (C) 2017 Elsevier Masson SAS. All rights reserved.
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