A 2D Conductive Organic-Inorganic Hybrid with Extraordinary Volumetric Capacitance at Minimal Swelling.
basic_science · Level V
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- Record sourced from PubMed, PMID 29766580.
- Also identified by DOI 10.1002/adma.201800400.
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Abstract
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<sup>-1</sup> ). In contrast to the pre-existing organic-based 2D materials, this material has extremely low gas-permeable porosity (16.5 m<sup>2</sup> g<sup>-1</sup> ) in contrast to the high ionic accessibility. All these structural features collectively contribute to the high capacitances up to 732 F cm<sup>-3</sup> , 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<sup>-3</sup> , which universally outperforms the surface-dominant capacitive processes in porous carbons.