Issue 12, 2021

Solid-state integrated micro-supercapacitor array construction with low-cost porous biochar

Abstract

The scalable production of flexible integrated micro-supercapacitors (MSCs) with high performance and low cost is urgently required. Printing is a promising strategy to build MSCs with designable shapes. Here, one kind of cost-effective and universal conductive ink derived from the porous activated biochar has been introduced, which is used for the scalable fabrication of carbon-based planar MSCs on various flexible substrates by the simple fabrication process of screen printing and program-controlled writing methods. The MSCs using the screen printing method have exhibited a favorable areal capacitance of 116 mF cm−2 and a high areal energy density of 9.26 μW h cm−2, and the integrated MSCs connected seven cells in series can also output a voltage of 5.6 V. In addition, the MSC arrays in this work have also been used for storing unstable external energy from a hand dynamo. This study provides significant guidance to construct metal-free integrated MSCs and facilitates the progress towards self-sustainable energy in the future.

Graphical abstract: Solid-state integrated micro-supercapacitor array construction with low-cost porous biochar

Supplementary files

Article information

Article type
Research Article
Submitted
11 fev 2021
Accepted
21 apr 2021
First published
04 may 2021

Mater. Chem. Front., 2021,5, 4772-4779

Solid-state integrated micro-supercapacitor array construction with low-cost porous biochar

Y. Liang, S. Wang, Y. Wang, S. He, Z. Liu, Y. Fu, Z. Sun, M. Li, Z. Wu and H. Yu, Mater. Chem. Front., 2021, 5, 4772 DOI: 10.1039/D1QM00240F

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