期刊
NANOSCALE
卷 13, 期 5, 页码 3285-3294出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr07076a
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资金
- European Union's Horizon 2020 research and innovation programme [696656]
- EC Marie-Curie ITN-iSwitch (GA) [642196]
- Swedish Research Council Formas [2016-00496]
- AngstromForsk Foundation [17-352]
- Vinnova [2016-00496] Funding Source: Vinnova
- Formas [2016-00496] Funding Source: Formas
Interdigitated all-solid-state flexible asymmetric micro-supercapacitors fabricated by a facile pulse current deposition approach demonstrate high volumetric capacitance, wide operation potential range, and long cycle life, showing potential for future high-performance energy storage devices.
To meet the charging market demands of portable microelectronics, there has been a growing interest in high performance and low-cost microscale energy storage devices with excellent flexibility and cycling durability. Herein, interdigitated all-solid-state flexible asymmetric micro-supercapacitors (A-MSCs) were fabricated by a facile pulse current deposition (PCD) approach. Mesoporous Fe2O3 and MnO2 nanoflakes were functionally coated by electrodeposition on inkjet-printed graphene patterns as negative and positive electrodes, respectively. Our PCD approach shows significantly improved adhesion of nanostructured metal oxide with crack-free and homogeneous features, as compared with other reported electrodeposition approaches. The as-fabricated Fe2O3/MnO2 A-MSCs deliver a high volumetric capacitance of 110.6 F cm(-3) at 5 mu A cm(-2) with a broad operation potential range of 1.6 V in neutral LiCl/PVA solid electrolyte. Furthermore, our A-MSC devices show a long cycle life with a high capacitance retention of 95.7% after 10 000 cycles at 100 mu A cm(-2). Considering its low cost and potential scalability to industrial levels, our PCD technique could be an efficient approach for the fabrication of high-performance MSC devices in the future.
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