Transparent and Multi‐Foldable Nanocellulose Paper Microsupercapacitors

Despite the ever‐increasing demand for transparent power sources in wireless optoelectronics, most of them have still relied on synthetic chemicals, thus limiting their versatile applications. Here, a class of transparent nanocellulose paper microsupercapacitors (TNP‐MSCs) as a beyond‐synthetic‐mate...

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Bibliographic Details
Published in:Advanced science 2022-12, Vol.9 (34), p.e2203720-n/a
Main Authors: Kim, Sang‐Woo, Lee, Kwon‐Hyung, Lee, Yong‐Hyeok, Youe, Won‐Jae, Gwon, Jae‐Gyoung, Lee, Sang‐Young
Format: Article
Language:English
Subjects:
biopolymer
Deformation
Electric Capacitance
Electric Conductivity
Electrodes
Electrolytes
Flexibility
foldable electronics
nanocellulose
Nanowires
Polyethylene terephthalate
Polymers
Silver
supercapacitors
Temperature
transparent power source
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Summary:Despite the ever‐increasing demand for transparent power sources in wireless optoelectronics, most of them have still relied on synthetic chemicals, thus limiting their versatile applications. Here, a class of transparent nanocellulose paper microsupercapacitors (TNP‐MSCs) as a beyond‐synthetic‐material strategy is demonstrated. Onto semi‐interpenetrating polymer network‐structured, thiol‐modified transparent nanocellulose paper, a thin layer of silver nanowire and a conducting polymer (chosen as a pseudocapacitive electrode material) are consecutively introduced through microscale‐patterned masks (which are fabricated by electrohydrodynamic jet printing) to produce a transparent conductive electrode (TNP‐TCE) with planar interdigitated structure. This TNP‐TCE, in combination with solid‐state gel electrolytes, enables on‐demand (in‐series/in‐parallel) cell configurations in a single body of TNP‐MSC. Driven by this structural uniqueness and scalable microfabrication, the TNP‐MSC exhibits improvements in optical transparency (T = 85%), areal capacitance (0.24 mF cm−2), controllable voltage (7.2 V per cell), and mechanical flexibility (origami airplane), which exceed those of previously reported transparent MSCs based on synthetic chemicals. Transparent nanocellulose paper microsupercapacitos (TNP‐MSCs) as a natural material strategy are presented to overcome the challenges of synthetic chemicals‐based transparent power sources. The TNP‐MSCs with a microscale planar interdigitated structure enable the on‐demand cell configurations with tunable voltages and capacitances in a single body, and exhibit superior optical transparency and mechanical deformability, which outperform those of previously reported transparent MSCs.
ISSN:2198-3844
2198-3844
DOI:10.1002/advs.202203720