TY - JOUR
T1 - Mesoporous N-rich Carbon with Single-Ni Atoms as a Multifunctional Sulfur Host for Li-S Batteries
AU - Li, Yunxiang
AU - Zeng, Yinxiang
AU - Chen, Ye
AU - Luan, Deyan
AU - Gao, Shuyan
AU - Lou, Xiong Wen (David)
PY - 2022/11/21
Y1 - 2022/11/21
N2 - Physicochemical confinement and catalytic conversion of lithium polysulfides (LiPSs) are crucial to suppress the shuttle effect and enhance the redox kinetics of lithium-sulfur (Li-S) batteries. In this study, a NH4Cl-assisted pyrolysis strategy is developed to fabricate highly mesoporous N-rich carbon (designed as NC(p)) featuring thin outer shells and porous inner networks, on which single-Ni atoms are anchored to form an excellent sulfur host (designed as Ni-NC(p)) for Li-S batteries. During pyrolysis, the pyrolytic HCl from confined NH4Cl within ZIF-8 will in situ etch ZIF-8 to produce rich mesoporous in the carbonized product NC(p). The mesoporous Ni-NC(p) enables favorable electron/ion transfer, high sulfur loading, and effective confinement of LiPSs, while the catalytic effect of single-Ni species enhances the redox kinetics of LiPSs. As a result, the sulfur cathode based on the Ni-NC(p) host delivers obviously improved Li-S battery performance with high specific capacity, good rate capability, and cycling stability. © 2022 Wiley-VCH GmbH.
AB - Physicochemical confinement and catalytic conversion of lithium polysulfides (LiPSs) are crucial to suppress the shuttle effect and enhance the redox kinetics of lithium-sulfur (Li-S) batteries. In this study, a NH4Cl-assisted pyrolysis strategy is developed to fabricate highly mesoporous N-rich carbon (designed as NC(p)) featuring thin outer shells and porous inner networks, on which single-Ni atoms are anchored to form an excellent sulfur host (designed as Ni-NC(p)) for Li-S batteries. During pyrolysis, the pyrolytic HCl from confined NH4Cl within ZIF-8 will in situ etch ZIF-8 to produce rich mesoporous in the carbonized product NC(p). The mesoporous Ni-NC(p) enables favorable electron/ion transfer, high sulfur loading, and effective confinement of LiPSs, while the catalytic effect of single-Ni species enhances the redox kinetics of LiPSs. As a result, the sulfur cathode based on the Ni-NC(p) host delivers obviously improved Li-S battery performance with high specific capacity, good rate capability, and cycling stability. © 2022 Wiley-VCH GmbH.
KW - Li-S Battery
KW - Lithium Polysulfide
KW - Pore Confinement
KW - Porous Carbon
KW - Single-Atom Catalyst
UR - http://www.scopus.com/inward/record.url?scp=85140260949&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85140260949&origin=recordpage
U2 - 10.1002/anie.202212680
DO - 10.1002/anie.202212680
M3 - RGC 21 - Publication in refereed journal
C2 - 36165571
SN - 1433-7851
VL - 61
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 47
M1 - e202212680
ER -
