Premium
2D Meso/Microporous Platelet Carbon Derived from Metal‐Organic frameworks and Its Application in High‐Performance Li‐S Batteries
Author(s) -
Qian Weiwei,
Zhang Hang,
Xiao Hong,
Zhang Lan,
Chen Shimou,
Gao Qiuming
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201900585
Subject(s) - materials science , mesoporous material , graphene , pyrolysis , cathode , microporous material , chemical engineering , metal organic framework , carbon fibers , nanosheet , nanotechnology , composite material , chemistry , catalysis , organic chemistry , composite number , adsorption , engineering
A cathode consisting of 2D homogeneous micro/mesoporous platelet carbon (MMPC) is synthesized in one step by regulated pyrolysis of metal–organic frameworks (MOF), which act as self‐templates. The uniform micro/mesoporous structure is ascribed to metal sublimation in the Zn‐based MOF during the pyrolysis process. The cathode exhibits an excellent cycling performance due to the homogeneous distribution of micro/mesopores and the 2D nanosheet structure, which does not only lead to the loading of evenly distributed, ultrafine sulfur, but also favors the depressing shuttle effect and a rapid electron transfer. Meanwhile, reduced oxide graphene (rGO) – as the conductive agent – is beneficial for the continuity of the electron‐transport path and for increasing the utilization of active materials. The optimized MMPC cathode exhibits a superior cycling stability at a rate of 1 C, with 1500 cycles, and an outstanding rate‐cycle performance with an initial discharge capacity of 670.1 mAh g −1 and a good cycling stability after 400 cycles at a rate of 5 C.