Sulfur-infiltrated yeast-derived nitrogen-rich porous carbon microspheres @ reduced graphene cathode for high-performance lithium-sulfur batteries

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F18%3A00005915" target="_blank" >RIV/46747885:24410/18:00005915 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S001346861831750X" target="_blank" >https://www.sciencedirect.com/science/article/pii/S001346861831750X</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.electacta.2018.07.222" target="_blank" >10.1016/j.electacta.2018.07.222</a>

Result language
angličtina
Original language name
Sulfur-infiltrated yeast-derived nitrogen-rich porous carbon microspheres @ reduced graphene cathode for high-performance lithium-sulfur batteries
Original language description
The defects of polysulfide dissolution and sulfur insulating causes in Li-sulfur batteries have effectively diminished by immobilizing sulfur in porous carbon microspheres via the interactions of doping-nitrogen and encapsulating-reduced graphene. The nitrogen-rich porous carbon microspheres were prepared by using yeast as natural precursor and high content of nitrogen (up to 8.52%) doped carbon microspheres was confirmed by the elemental analysis. As cathode for lithium-sulfur batteries, the rGO@HYC/S composite exhibits a high retention capacity of 921 mA h g−1 at 0.2 C and 675 mA h g−1 at 1 C over 200 cycles. The battery delivers low capacity decay rate of 0.09% and stable coulombic efficiency about 98% at 1 C during the 200 cycles. Further, we reveal that the enhanced electrochemical performance is ascribed to a hollow porous structure of carbon framework for sulfur storage, carbon matrix exerted by nitrogen-doping for polysulfide adsorption, rGO wrapper for polysulfide interception and conductivity improvement.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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