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Thermal Exfoliation of Layered Metal–Organic Frameworks into Ultrahydrophilic Graphene Stacks and Their Applications in Li–S Batteries
Author(s) -
Hao GuangPing,
Tang Cheng,
Zhang En,
Zhai Peiyan,
Yin Jun,
Zhu Wancheng,
Zhang Qiang,
Kaskel Stefan
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201702829
Subject(s) - materials science , graphene , exfoliation joint , nanotechnology , wetting , cathode , metal organic framework , chemical engineering , supercapacitor , chemical vapor deposition , electrochemistry , adsorption , composite material , electrode , organic chemistry , chemistry , engineering
2D nanocarbon‐based materials with controllable pore structures and hydrophilic surface show great potential in electrochemical energy storage systems including lithium sulfur (Li–S) batteries. This paper reports a thermal exfoliation of metal–organic framework crystals with intrinsic 2D structure into multilayer graphene stacks. This family of nanocarbon stacks is composed of well‐preserved 2D sheets with highly accessible interlayer macropores, narrowly distributed 7 Å micropores, and ever most polar pore walls. The surface polarity is quantified both by its ultrahigh water vapor uptake of 14.3 mmol g −1 at low relative pressure of P / P 0 = 0.4 and ultrafast water wetting capability in less than 10.0 s. Based on the structural merits, this series hydrophilic multilayer graphene stack is showcased as suitable model cathode host for unveiling the challenging surface chemistry issue in Li–S batteries.