Biomass-Derived Porous Carbon with Micropores and Small Mesopores for High-Performance Lithium-Sulfur Batteries.
Chemistry
; 22(10): 3239-3244, 2016 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-26807663
ABSTRACT
Biomass-derived porous carbon BPC-700, incorporating micropores and small mesopores, was prepared through pyrolysis of banana peel followed by activation with KOH. A high specific BET surface area (2741â
m2 g-1 ), large specific pore volume (1.23â
cm3 g-1 ), and well-controlled pore size distribution (0.6-5.0â
nm) were obtained and up to 65â
wt % sulfur content could be loaded into the pores of the BPC-700 sample. When the resultant C/S composite, BPC-700-S65, was used as the cathode of a Li-S battery, a large initial discharge capacity (ca.â
1200â
mAh g-1 ) was obtained, indicating a good sulfur utilization rate. An excellent discharge capacity (590â
mAh g-1 ) was also achieved for BPC-700-S65 at the high current rate of 4â
C (12.72â
mA cm-2 ), showing its extremely high rate capability. A reversible capacity of about 570â
mAh g-1 was achieved for BPC-700-S65 after 500 cycles at 1â
C (3.18â
mA cm-2 ), indicating an outstanding cycling stability.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2016
Tipo de documento:
Article