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Direct Semiconductor Laser Writing of Few‐Layer Graphene Polyhedra Networks for Flexible Solid‐State Supercapacitor
Author(s) -
Liu Chunlin,
Liang Hongwei,
Wu Dun,
Lu Xiangyu,
Wang Qiang
Publication year - 2018
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201800092
Subject(s) - materials science , supercapacitor , graphene , electrolyte , capacitance , nanotechnology , semiconductor , carbon fibers , laser ablation , polymer , chemical engineering , heteroatom , optoelectronics , electrode , laser , composite material , optics , organic chemistry , ring (chemistry) , chemistry , physics , engineering , composite number
Here, a simple one‐step fabrication methodology is presented for continuous heteroatoms‐doped carbon polyhedra networks via direct semiconductor laser writing on polyimide sheets. It is found that these nanosized polyhedra are nonporous solids and comprised of few‐layer graphene. By the adoption of lithium containing polymer gel electrolyte, flexible solid‐state supercapacitors are designed and assembled in planar and interdigitated configuration with the irradiated plastic sheets as electrodes. When compared to their counterparts with the acid gel electrolyte, they exhibit high areal specific capacitance up to 34.7 mF cm −2 (vs ≈8 mF cm −2 ) at the current density of 0.1 mA cm −2 . This substantial enhancement is considered to be due to the combination of Faradaic intercalation and non‐Faradaic absorption of the Li‐ions at the carbon polyhedra membrane electrodes. With the improvement of energy density, the complex of supercapacitor device is capable of lighting the liquid crystal display of a commercial hygrometer for ≈1 min.