Journal
ADVANCED MATERIALS
Volume 29, Issue 43, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201701736
Keywords
flexible devices; inkjet printing; nanocoral structures; planar supercapacitors; wearable self-powered systems
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Funding
- General Research Fund from Hong Kong Research Grant Council [16237816]
- Hong Kong Innovation Technology Commission and National Natural Science Foundation of China [ITS/362/14FP, 51672231]
- State Key Laboratory on Advanced Displays and Optoelectronics at HKUST
- Center for 1D/2D Quantum Materials
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Planar supercapacitors with high flexibility, desirable operation safety, and high performance are considered as attractive candidates to serve as energy-storage devices for portable and wearable electronics. Here, a scalable and printable technique is adopted to construct novel and unique hierarchical nanocoral structures as the interdigitated electrodes on flexible substrates. The as-fabricated flexible all-solid-state planar supercapacitors with nanocoral structures achieve areal capacitance up to 52.9 mF cm(-2), which is 2.5 times that of devices without nanocoral structures, and this figure-of-merit is among the highest in the literature for the same category of devices. More interestingly, due to utilization of the inkjet-printing technique, excellent versatility on electrode-pattern artistic design is achieved. Particularly, working supercapacitors with artistically designed patterns are demonstrated. Meanwhile, the high scalability of such a printable method is also demonstrated by fabrication of large-sized artistic supercapacitors serving as energy-storage devices in a wearable self-powered system as a proof of concept.
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