At relatively low temperature (e.g, -30 oC), most flexible supercapacitors that work well at room temperature will lose their stretchability due to the poor cold intolerance of conventional electrolytes and...
We summarized the progress in the synthesis, doping and modification strategies of GQDs and the development and application of GQDs in energy storage and conversion devices.
The
construction of multidimensional, diversified microsupercapacitors
(MSC) is urgently needed for fast-changing flexible and wearable microelectronics,
which still meets the challenges of tedious construction and difficult
integration. Herein, a laser direct writing strategy has been developed
for the one-step preparation of multiscale MSCs from editable macro-supercapacitors.
The microstructured supercapacitors with predefined multiscale shapes
not only maintain the high capacitance performance and stability but
also display the tensile properties in arbitrary direction. The heat-treated
ion liquid-modified reduced graphene oxide guarantees the thermal
stability of an electrode material during laser cutting, and its high
ion-accessible surface area improves the capacitance performance of
the supercapacitor. The as-fabricated MSC demonstrates a wide voltage
window (0–3 V), high areal specific capacitance (27.4 mF cm–2), and high energy density (32.1 μW h cm–2), which are far higher than those of most reported
articles. Notably, the editable supercapacitors can imitate the stereo
paper cutting to achieve an arbitrary one-dimensional to three-dimensional
configuration, promising for various portable, stretchable, and wearable
devices.
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