Journal
ADVANCED MATERIALS
Volume 30, Issue 26, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201800400
Keywords
2D materials; intercalation electrodes; organic-inorganic hybrid materials; supercapacitors; volumetric performance
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Funding
- UNSW Faculty of Engineering Start-up grant
- Australian Research Council [DP160103244]
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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 angstrom 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.
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