Surface-Adaptive Capillarity Enabling Densified 3D Printing for Ultra-High Areal and Volumetric Energy Density Supercapacitors.
Angew Chem Int Ed Engl
; 61(24): e202202663, 2022 Jun 13.
Article
en En
| MEDLINE
| ID: mdl-35347829
ABSTRACT
Endowing supercapacitors with higher energy density is of great practical significance but remains extremely challenging. In this work, an innovative densified 3D printing enabled by a surface-adaptive capillarity strategy is proposed for the first time. The printable ink formulated with pyrrole surface-modified reduced graphene oxide renders the printed electrodes excellent surface tension regulability to the subsequent capillary densification, creating an intensely condensed electrode with well-maintained structural integrity. Furthermore, simultaneous in situ nitrogen doping and hierarchical micro-meso porosity are readily realized upon post-carbonization, encouraging enhanced capacitance and fast reaction dynamics. As a result, the printed symmetric supercapacitor delivers a double leap in areal and volumetric energy densities in both aqueous and organic electrolytes, a rarely achieved yet gravely desired attribute for 3D printed energy storage devices.
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MEDLINE
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En
Revista:
Angew Chem Int Ed Engl
Año:
2022
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Article