TY - JOUR
T1 - Nitrogen-rich microporous carbon framework as an efficient polysulfide host for lithium-sulfur batteries
AU - Zhang, Xingyuan
AU - Zhou, Hanyuan
AU - Wang, Jian Gan
N1 - Publisher Copyright:
© 2020, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2021/2
Y1 - 2021/2
N2 - Lithium-sulfur batteries are recognized as a promising high-energy-density and low-cost energy storage devices. However, the sulfur cathode suffers from poor cycling stability resulting from the serious polysulfide shuttle. Herein, we develop a nitrogen-rich and highly porous carbon polyhedron for effectively hosting sulfur. The carbon host manifests an ultrahigh specific surface area of 3400 m2 g−1, a dominated micropore volume of 0.96 cm3 g−1, and a high-level nitrogen doping of 8.3 at.%. Such an intriguing structure could suppress the polysulfide shuttle via physical confinement by micropores and strong chemical adsorption by polar nitrogen species. Moreover, the electrically conductive carbon enables a substantially enhanced electrochemical kinetics. Consequently, the carbon/sulfur composite electrode delivers an ultralow fading rate of 0.033% per cycle at 2 C over 500 cycles and superior rate capability (483 mAh g−1 at a high 5 C rate). The present study demonstrates the potential use of nitrogen-rich porous carbon framework as an efficient polysulfide host for lithium-sulfur batteries.
AB - Lithium-sulfur batteries are recognized as a promising high-energy-density and low-cost energy storage devices. However, the sulfur cathode suffers from poor cycling stability resulting from the serious polysulfide shuttle. Herein, we develop a nitrogen-rich and highly porous carbon polyhedron for effectively hosting sulfur. The carbon host manifests an ultrahigh specific surface area of 3400 m2 g−1, a dominated micropore volume of 0.96 cm3 g−1, and a high-level nitrogen doping of 8.3 at.%. Such an intriguing structure could suppress the polysulfide shuttle via physical confinement by micropores and strong chemical adsorption by polar nitrogen species. Moreover, the electrically conductive carbon enables a substantially enhanced electrochemical kinetics. Consequently, the carbon/sulfur composite electrode delivers an ultralow fading rate of 0.033% per cycle at 2 C over 500 cycles and superior rate capability (483 mAh g−1 at a high 5 C rate). The present study demonstrates the potential use of nitrogen-rich porous carbon framework as an efficient polysulfide host for lithium-sulfur batteries.
UR - http://www.scopus.com/inward/record.url?scp=85092770743&partnerID=8YFLogxK
U2 - 10.1007/s10853-020-05433-5
DO - 10.1007/s10853-020-05433-5
M3 - 文章
AN - SCOPUS:85092770743
SN - 0022-2461
VL - 56
SP - 3364
EP - 3374
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 4
ER -