TY - JOUR
T1 - Metal-organic framework MIL-101(Fe)–NH2 as an efficient host for sulphur storage in long-cycle Li–S batteries
AU - Capková, D.
AU - Almáši, M.
AU - Kazda, T.
AU - Čech, O.
AU - Király, N.
AU - Čudek, P.
AU - Fedorková, A. Straková
AU - Hornebecq, V.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9/10
Y1 - 2020/9/10
N2 - Porous metal-organic framework (MOF) MIL-101(Fe)–NH2 was synthesized, characterized and used as a host material for sulphur in the context of lithium-sulphur batteries. The MIL-101(Fe)–NH2 support possessed, a large surface area, close to 3500 m2 g−1, and mild framework stability up to 120 °C. As the framework stability strongly depends on the presence of guests in the micro/mesoporous cages, conditions for sulphur inclusion process were carefully selected, and then the material was further carbonized. MOF as a conductive part of cathode material displayed successful sulphur capture and encapsulation. The encapsulation of sulphur was accompanied by highly stable charge/discharge cycle performances and high efficiency. Consequently, the cathode showed at a current rate 0.5C a high initial discharge capacity of 705 mA h g−1 and after 200 cycles of 476 mA h g−1, corresponding to a low fading rate of 0.162% per cycle. The capacity of the cycle after self-discharge was 94.8% of the capacity in the cycle before self-discharge.
AB - Porous metal-organic framework (MOF) MIL-101(Fe)–NH2 was synthesized, characterized and used as a host material for sulphur in the context of lithium-sulphur batteries. The MIL-101(Fe)–NH2 support possessed, a large surface area, close to 3500 m2 g−1, and mild framework stability up to 120 °C. As the framework stability strongly depends on the presence of guests in the micro/mesoporous cages, conditions for sulphur inclusion process were carefully selected, and then the material was further carbonized. MOF as a conductive part of cathode material displayed successful sulphur capture and encapsulation. The encapsulation of sulphur was accompanied by highly stable charge/discharge cycle performances and high efficiency. Consequently, the cathode showed at a current rate 0.5C a high initial discharge capacity of 705 mA h g−1 and after 200 cycles of 476 mA h g−1, corresponding to a low fading rate of 0.162% per cycle. The capacity of the cycle after self-discharge was 94.8% of the capacity in the cycle before self-discharge.
KW - Electrochemical energy storage
KW - Lithium-sulphur batteries
KW - Metal-organic framework
KW - MIL-101(Fe)–NH
UR - http://www.scopus.com/inward/record.url?scp=85087326930&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2020.136640
DO - 10.1016/j.electacta.2020.136640
M3 - Article
AN - SCOPUS:85087326930
SN - 0013-4686
VL - 354
JO - Electrochimica Acta
JF - Electrochimica Acta
M1 - 136640
ER -