Selective deposition of metal oxide nanoflakes on graphene electrodes to obtain high-performance asymmetric micro-supercapacitors
Journal article, 2021

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.

Author

Zhenyuan Xia

Chalmers, Industrial and Materials Science, Materials and manufacture

Viktoriia Mishukova

Royal Institute of Technology (KTH)

Szymon Sollami Delekta

Royal Institute of Technology (KTH)

Jinhua Sun

Chalmers, Industrial and Materials Science, Materials and manufacture

Jaime Sanchez Sanchez

Chalmers, Industrial and Materials Science, Materials and manufacture

Jiantong Li

Royal Institute of Technology (KTH)

Vincenzo Palermo

Chalmers, Industrial and Materials Science, Materials and manufacture

Nanoscale

2040-3364 (ISSN)

Vol. 13 5 3285-3294

Subject Categories

Other Environmental Engineering

Materials Chemistry

Energy Systems

DOI

10.1039/d0nr07076a

PubMed

33533790

More information

Latest update

3/23/2021