Enhancement of Electrochromic Properties of Polyaniline Induced by Copper Ions
Abstract Driven by the urgent need for adaptive infrared (IR) electrochromic devices, the improvement in electrochromic performance based on polyaniline (PANI) conducting polymers has become an outstanding challenge. In recent years, the acid doping strategy has been proven to increase the IR modula...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-05-01
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| Series: | Nanoscale Research Letters |
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| Online Access: | https://doi.org/10.1186/s11671-022-03689-1 |
| _version_ | 1797757566166499328 |
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| author | Ting Qin Lianwen Deng Pin Zhang Min Tang Chen Li Haipeng Xie Shengxiang Huang Xiaohui Gao |
| author_facet | Ting Qin Lianwen Deng Pin Zhang Min Tang Chen Li Haipeng Xie Shengxiang Huang Xiaohui Gao |
| author_sort | Ting Qin |
| collection | DOAJ |
| description | Abstract Driven by the urgent need for adaptive infrared (IR) electrochromic devices, the improvement in electrochromic performance based on polyaniline (PANI) conducting polymers has become an outstanding challenge. In recent years, the acid doping strategy has been proven to increase the IR modulation ability of PANI, in particular for the Bronsted acid doping. Herein, the effects of copper ions, a Lewis acid, on the structure and electrochromic properties of polyaniline were investigated. Compared to pure polyaniline, the Cu-doped PANI porous films show better IR modulation ability. With the increasing concentration of copper ions, the Cu-doped PANI porous films exhibit a trend in volcanic patterns for the emittance variation (∆ε), depending on the number of polarons and bipolarons. The optimal IR emissivity (ε) modulation obtained on Cu-doped PANI films shows the ∆ε modulation of 0.35 and 0.3 in the wavelength range of 8–14 µm and 2.5–25 µm, superior to previously reported pure sulfuric acid-doped PANI. Furthermore, a flexible IR electrochromic device was fabricated with the present Cu-doped PANI porous films. The modulation of the emittance variation varied between 0.513 and 0.834 (∆ε = 0.32 in ranges of wavelength 8–12 µm), suggesting the great potential for applications in military camouflage and intelligent IR thermal management. We believe that the results in this work will provide a novel perspective and avenue for improving the IR modulation ability of electrochromic devices based on polyaniline conducting polymers. |
| first_indexed | 2024-03-12T18:17:36Z |
| format | Article |
| id | doaj.art-d7955bede17340a6a9888232939d63ef |
| institution | Directory Open Access Journal |
| issn | 1556-276X |
| language | English |
| last_indexed | 2024-03-12T18:17:36Z |
| publishDate | 2022-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-d7955bede17340a6a9888232939d63ef2023-08-02T09:05:45ZengSpringerOpenNanoscale Research Letters1556-276X2022-05-0117111310.1186/s11671-022-03689-1Enhancement of Electrochromic Properties of Polyaniline Induced by Copper IonsTing Qin0Lianwen Deng1Pin Zhang2Min Tang3Chen Li4Haipeng Xie5Shengxiang Huang6Xiaohui Gao7School of Physics and Electronics, Central South UniversitySchool of Physics and Electronics, Central South UniversityNational Key Laboratory on Electromagnetic Environmental Effects and Electro-Optical Engineering, Army Engineering University of PLASchool of Physics and Electronics, Central South UniversitySchool of Physics and Electronics, Central South UniversitySchool of Physics and Electronics, Central South UniversitySchool of Physics and Electronics, Central South UniversitySchool of Physics and Electronics, Central South UniversityAbstract Driven by the urgent need for adaptive infrared (IR) electrochromic devices, the improvement in electrochromic performance based on polyaniline (PANI) conducting polymers has become an outstanding challenge. In recent years, the acid doping strategy has been proven to increase the IR modulation ability of PANI, in particular for the Bronsted acid doping. Herein, the effects of copper ions, a Lewis acid, on the structure and electrochromic properties of polyaniline were investigated. Compared to pure polyaniline, the Cu-doped PANI porous films show better IR modulation ability. With the increasing concentration of copper ions, the Cu-doped PANI porous films exhibit a trend in volcanic patterns for the emittance variation (∆ε), depending on the number of polarons and bipolarons. The optimal IR emissivity (ε) modulation obtained on Cu-doped PANI films shows the ∆ε modulation of 0.35 and 0.3 in the wavelength range of 8–14 µm and 2.5–25 µm, superior to previously reported pure sulfuric acid-doped PANI. Furthermore, a flexible IR electrochromic device was fabricated with the present Cu-doped PANI porous films. The modulation of the emittance variation varied between 0.513 and 0.834 (∆ε = 0.32 in ranges of wavelength 8–12 µm), suggesting the great potential for applications in military camouflage and intelligent IR thermal management. We believe that the results in this work will provide a novel perspective and avenue for improving the IR modulation ability of electrochromic devices based on polyaniline conducting polymers.https://doi.org/10.1186/s11671-022-03689-1PolyanilineElectrochromic deviceInfrared emissivityPolarons and bipolarons |
| spellingShingle | Ting Qin Lianwen Deng Pin Zhang Min Tang Chen Li Haipeng Xie Shengxiang Huang Xiaohui Gao Enhancement of Electrochromic Properties of Polyaniline Induced by Copper Ions Nanoscale Research Letters Polyaniline Electrochromic device Infrared emissivity Polarons and bipolarons |
| title | Enhancement of Electrochromic Properties of Polyaniline Induced by Copper Ions |
| title_full | Enhancement of Electrochromic Properties of Polyaniline Induced by Copper Ions |
| title_fullStr | Enhancement of Electrochromic Properties of Polyaniline Induced by Copper Ions |
| title_full_unstemmed | Enhancement of Electrochromic Properties of Polyaniline Induced by Copper Ions |
| title_short | Enhancement of Electrochromic Properties of Polyaniline Induced by Copper Ions |
| title_sort | enhancement of electrochromic properties of polyaniline induced by copper ions |
| topic | Polyaniline Electrochromic device Infrared emissivity Polarons and bipolarons |
| url | https://doi.org/10.1186/s11671-022-03689-1 |
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