Journal
SMALL
Volume 15, Issue 34, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201901830
Keywords
flexible electronics; inkjet printing; micro-supercapacitors; nanofiber-like structures
Categories
Funding
- National Natural Science Foundation of China [21835003, 91833304, 21422402, 21674050, 21805136]
- National Key Basic Research Program of China (973 Program) [2014CB648300, 2017YFB0404501]
- Natural Science Foundation of Jiangsu Province [BK20140060, BM2012010, BK20170999]
- Six Talent Peaks Project of Jiangsu Province [TD-XCL-009]
- 333 Project of Jiangsu Province [BRA2017402]
- Leading Talent of Technological Innovation of National Ten-Thousands Talents Program of China
- Excellent Scientific and Technological Innovative Teams of Jiangsu Higher Education Institutions [TJ217038]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- NUPT 1311 Project
- Program for Jiangsu Specially-Appointed Professor [RK030STP15001]
- [NY219020]
- [NY218164]
- [NY217169]
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Flexible planar micro-supercapacitors (MSCs) with unique loose and porous nanofiber-like electrode structures are fabricated by combining electrochemical deposition with inkjet printing. Benefiting from the resulting porous nanofiber-like structures, the areal capacitance of the inkjet-printed flexible planar MSCs is obviously enhanced to 46.6 mF cm(-2), which is among the highest values ever reported for MSCs. The complicated fabrication process is successfully averted as compared with previously reported best-performing planar MSCs. Besides excellent electrochemical performance, the resultant MSCs also show superior mechanical flexibility. The as-fabricated MSCs can be highly bent to 180 degrees 1000 times with the capacitance retention still up to 86.8%. Intriguingly, because of the remarkable patterning capability of inkjet printing, various modular MSCs in serial and in parallel can be directly and facilely inkjet-printed without using external metal interconnects and tedious procedures. As a consequence, the electrochemical performance can be largely enhanced to better meet the demands of practical applications. Additionally, flexible serial MSCs with exquisite and aesthetic patterns are also inkjet-printed, showing great potential in fashionable wearable electronics. The results suggest a feasible strategy for the facile and cost-effective fabrication of high-performance flexible MSCs via inkjet printing.
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