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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica Acta

ISSN

0013-4686

e-ISSN

—

Svazek periodika

285

Číslo periodika v rámci svazku

SEP

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

317-325

Kód UT WoS článku

000445131700034

EID výsledku v databázi Scopus

2-s2.0-85051105985