Chitin-Derived Hierarchical Meso- and Microporous Carbon Enables High-Rate Sulfur Cathode of Sodium-Sulfur Batteries.
ChemSusChem
; : e202400757, 2024 Jun 06.
Article
en En
| MEDLINE
| ID: mdl-38842481
ABSTRACT
Room temperature Na-S batteries are considered as a promising alternative energy storage system because of their abundant material resources and high theoretical energy density. However, the severe polysulfide shuttle effect and slow reaction kinetics hinder their practical application. Herein, a hierarchical meso- and microporous carbon with nitrogen self-doping (NSPC) is prepared using chitin as the carbon precursor and serves as a novel host to confine the sulfur (SâNSPC). An optimized structure of NSPC, including abundant graphite nanocrystals, large pore volume of 1.76â
cm3 g-1, and large specific surface area of 2073â
m2 g-1 is obtained at the carbonization temperature of 1000 °C. These merits contribute to significantly enhanced charge transfer and ion diffusion of the as-prepared SâNSPC-1000 cathode, which exhibits the outstanding sodium storage performance, including high reversible capacities of 1207â
mAh g-1 at 0.1â
C and 891â
mAh g-1 at 2â
C and stable cycling with a low capacity decay for 400â
cycles at 1â
C, among other SâNSPC cathodes and previously reported cathodes for Na-S batteries. This cathode can also afford stable cycling at a high sulfur loading.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
ChemSusChem
Asunto de la revista:
QUIMICA
/
TOXICOLOGIA
Año:
2024
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Alemania