Journal
JOURNAL OF POWER SOURCES
Volume 433, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2019.05.082
Keywords
Screen printing technology; Flexible energy storage system; Solid-state supercapacitors; Composite nanomaterials; Active electrodes
Funding
- NSFC [51471121]
- Basic Research Plan Program of Shenzhen City [JCYJ20170303170426117]
- Hunan Provincial Key Research and Development Program [2018GK2064]
- Research Plan Program of Changsha City [kq1804010]
- Fundamental Research Funds for the Central Universities [2042018kf203]
- Wuhan University
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The increasing development demand of wearable electronics for intelligent life accelerates the studies and explorations on portable flexible energy storage system. However, how to achieve high performance power sources on a par with uncomplicated and high-efficient fabrication processes also is a huge challenge. Herein, Ni(OH)(2)/NiMoO4 composites with enhanced specific capacitance and cyclic lifespan are synthesized via a facile hydro thermal method. And the composites are used as functional inks for the fabrication of printed electrode of flexible solid-state supercapacitors. Large specific capacitance of 1547.3 F g(-1) is achieved by the composite electrode at 1 A g(-1). After charging and discharging 1000 times, 88.1% of the initial capacitance at 20 A g(-1) can be retained. Large-scale flexible solid-state supercapacitors are developed through fully screen printing technique in a very short time, which exhibit high stability (115% capacitance retention after 5000 cycles) and good flexibility (81.7% of capacitance remained after 750 bending/releasing cycles). Moreover, when three printed super capacitors are connected in series, a yellow light emitting diode (1.9 V) can be easily lighted up, which is preconceived to be a promising portable energy storage system in future wearable electronics.
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