nn9b02176_si_002.avi (6.01 MB)
Laser-Assisted Multiscale Fabrication of Configuration-Editable Supercapacitors with High Energy Density
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posted on 2019-05-28, 00:00 authored by Jian Gao, Changxiang Shao, Shengxian Shao, Congcong Bai, Ur Rehman Khalil, Yang Zhao, Lan Jiang, Liangti QuThe
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.