High-performance stacked in-plane supercapacitors and supercapacitor array fabricated by femtosecond laser 3D direct writing on polyimide sheets

Shutong Wang, Yongchao Yu, Ruozhou Li, Guoying Feng, Zili Wu, Giuseppe Compagnini, Antonino Gulino, Zhili Feng, Anming Hu

Research output: Contribution to journalArticlepeer-review

103 Scopus citations

Abstract

We demonstrate the fabrication of in-plane and multi-layer 3D micro-supercapacitors (MSCs) based on laser carbonization of polyimide (PI) sheets. Focused femtosecond (fs) laser pulses rapidly convert the insulating PI into an electrically conductive porous carbon structure. The specific capacitance of the single-layer supercapacitor with a thickness of 80 μm reaches 22.40 mF/cm2 (2.8 F/cm3) at 0.1 mA/cm2 charge-discharge current density. The high performance is attributed to hierarchical porous structures and the appropriate heteroatom nitrogen/oxygen doping. The 2-layer and 3-layer stacked MSCs show an improved specific capacitance as high as 37.2 mF/cm2 and 42.6 mF/cm2 at a current density of 0.1 mA/cm2, respectively, which are attractive values among the carbon material-based MSCs reported till now. The voltage and capacitance can be scaled up by simply writing MSC arrays in serial and parallel connections. The facile fabrication and superior performance of carbon-based MSCs fabricated by laser direct writing may pave the way for promising applications of flexible, portable, and wearable electronic devices.

Original languageEnglish
Pages (from-to)153-161
Number of pages9
JournalElectrochimica Acta
Volume241
DOIs
StatePublished - Jul 1 2017

Funding

We appreciate a patent maturation fund provided by the University of Tennessee Research Foundation, a grant from National Natural Science Foundation of China (51575016), a strategic research grant (KZ20141000500, B-type) of Beijing Municipal Natural Science Foundation, and the Beijing Oversea High-Level Talent Project, P. R. China. Part of the work including the Raman characterization was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. S.W. would like to acknowledge the support of the CSC scholarship from the Ministry of Education of P. R. China. GC and AG gratefully acknowledge project PON a3_00136 named BRIT.

FundersFunder number
Beijing Oversea High-Level Talent Project
University of Tennessee Research Foundation
Office of Science
National Natural Science Foundation of ChinaKZ20141000500, 51575016
Ministry of Education of the People's Republic of China
China Scholarship Council
Beijing Municipal Natural Science Foundation

    Keywords

    • femtosecond laser
    • laser 3D writing
    • laser ablation
    • polyimide
    • super-capacitors

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