Highly conductive, conformable ionic laser-induced graphene electrodes for flexible iontronic devices
Abstract Iontronic devices, recognized for user-friendly soft electronics, establish an electrical double layer (EDL) at the interface between ion gels and electrodes, significantly influencing device performance. Despite extensive research on ion gels and diverse electrode materials, achieving a st...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-02-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-55082-w |
| _version_ | 1827327383444652032 |
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| author | So Young Kim Ji Hong Kim Kyeong Nam Kim Hayoung Oh Sung Myung Do Hwan Kim |
| author_facet | So Young Kim Ji Hong Kim Kyeong Nam Kim Hayoung Oh Sung Myung Do Hwan Kim |
| author_sort | So Young Kim |
| collection | DOAJ |
| description | Abstract Iontronic devices, recognized for user-friendly soft electronics, establish an electrical double layer (EDL) at the interface between ion gels and electrodes, significantly influencing device performance. Despite extensive research on ion gels and diverse electrode materials, achieving a stable interfacial formation remains a persistent challenge. In this work, we report a solution to address this challenge by employing CO2 irradiation as a bottom-up methodology to directly fabricate highly conductive, conformable laser-induced graphene (LIG) electrodes on a polyimide (PI)-based ion gel. The PI ion gel exhibits exceptional EDL formation at the electrode interface, primarily attributable to efficient ion migration. Particularly, ionic laser-induced graphene (i-LIG) electrodes, derived from the PI ion gel as a precursor, yield high-quality graphene with enhanced crystallinity and an expanded porous structure in the upward direction. This outcome is achieved through a pronounced thermal transfer effect and intercalation phenomenon between graphene layers, facilitated by the presence of ionic liquids (ILs) within the PI ion gel. Ultimately, in comparison to alternative soft electrode-based vertical capacitors, the utilization of i-LIGs and PI ion gels in the vertical capacitor demonstrates reduced interfacial resistance and increased EDL capacitance, emphasizing the extensive potential of iontronic devices. These results not only highlight these features but also introduce a new perspective for advancing next-generation iontronic devices. |
| first_indexed | 2024-03-07T15:00:25Z |
| format | Article |
| id | doaj.art-65e6141519804f13b7b286048023b9f7 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-07T15:00:25Z |
| publishDate | 2024-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-65e6141519804f13b7b286048023b9f72024-03-05T19:12:09ZengNature PortfolioScientific Reports2045-23222024-02-011411810.1038/s41598-024-55082-wHighly conductive, conformable ionic laser-induced graphene electrodes for flexible iontronic devicesSo Young Kim0Ji Hong Kim1Kyeong Nam Kim2Hayoung Oh3Sung Myung4Do Hwan Kim5Department of Chemical Engineering, Hanyang UniversityDepartment of Chemical Engineering, Hanyang UniversityDivision of Energy Technology, DGISTDepartment of Chemical Engineering, Hanyang UniversityThin Film Material Research Center, Korea Research Institute of Chemical Technology (KRICT)Department of Chemical Engineering, Hanyang UniversityAbstract Iontronic devices, recognized for user-friendly soft electronics, establish an electrical double layer (EDL) at the interface between ion gels and electrodes, significantly influencing device performance. Despite extensive research on ion gels and diverse electrode materials, achieving a stable interfacial formation remains a persistent challenge. In this work, we report a solution to address this challenge by employing CO2 irradiation as a bottom-up methodology to directly fabricate highly conductive, conformable laser-induced graphene (LIG) electrodes on a polyimide (PI)-based ion gel. The PI ion gel exhibits exceptional EDL formation at the electrode interface, primarily attributable to efficient ion migration. Particularly, ionic laser-induced graphene (i-LIG) electrodes, derived from the PI ion gel as a precursor, yield high-quality graphene with enhanced crystallinity and an expanded porous structure in the upward direction. This outcome is achieved through a pronounced thermal transfer effect and intercalation phenomenon between graphene layers, facilitated by the presence of ionic liquids (ILs) within the PI ion gel. Ultimately, in comparison to alternative soft electrode-based vertical capacitors, the utilization of i-LIGs and PI ion gels in the vertical capacitor demonstrates reduced interfacial resistance and increased EDL capacitance, emphasizing the extensive potential of iontronic devices. These results not only highlight these features but also introduce a new perspective for advancing next-generation iontronic devices.https://doi.org/10.1038/s41598-024-55082-w |
| spellingShingle | So Young Kim Ji Hong Kim Kyeong Nam Kim Hayoung Oh Sung Myung Do Hwan Kim Highly conductive, conformable ionic laser-induced graphene electrodes for flexible iontronic devices Scientific Reports |
| title | Highly conductive, conformable ionic laser-induced graphene electrodes for flexible iontronic devices |
| title_full | Highly conductive, conformable ionic laser-induced graphene electrodes for flexible iontronic devices |
| title_fullStr | Highly conductive, conformable ionic laser-induced graphene electrodes for flexible iontronic devices |
| title_full_unstemmed | Highly conductive, conformable ionic laser-induced graphene electrodes for flexible iontronic devices |
| title_short | Highly conductive, conformable ionic laser-induced graphene electrodes for flexible iontronic devices |
| title_sort | highly conductive conformable ionic laser induced graphene electrodes for flexible iontronic devices |
| url | https://doi.org/10.1038/s41598-024-55082-w |
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