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A 2D Conductive Organic–Inorganic Hybrid with Extraordinary Volumetric Capacitance at Minimal Swelling
Author(s) -
Xiao Kefeng,
Jiang Donglin,
Amal Rose,
Wang DaWei
Publication year - 2018
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.201800400
Subject(s) - materials science , lamella (surface anatomy) , intercalation (chemistry) , supercapacitor , capacitance , electrical conductor , porosity , chemical engineering , hybrid material , nanotechnology , ionic bonding , electrode , thin film , composite material , ion , inorganic chemistry , organic chemistry , chemistry , engineering
Rational design and synthesis of 2D organic–inorganic hybrid materials is important for transformative technological advances for energy storage. Here, a 2D conductive hybrid lamella and its intercalation properties for thin‐film supercapacitors are reported. The 2D organic–inorganic hybrid lamella comprises periodically stacked 2D nanosheets with 11.81 Å basal spacing, and is electronically conductive (605 S m −1 ). In contrast to the pre‐existing organic‐based 2D materials, this material has extremely low gas‐permeable porosity (16.5 m 2 g −1 ) in contrast to the high ionic accessibility. All these structural features collectively contribute to the high capacitances up to 732 F cm −3 , combined with small structural swelling at as low as 4.8% and good stability. At a discharge time of 6 s, the thin‐film intercalation electrode delivers an energy density of 24 mWh cm −3 , which universally outperforms the surface‐dominant capacitive processes in porous carbons.