International Journal of Electrochemical Science
·
2023
·
IF 1.5
Lanlan Shen,Zhiru Bai,Yu Jiang,Liying Li,Fengxing Jiang,Jingkun Xu,Huanhuan Qiu,Huixuan Liu,Rongri Tan
Based on quaterthiophenen, bisethyleneoxyl are appended to thiophene rings (2,5-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)thieno[3,2-b]thiophene, BED-TT) for modified monomer structure and obtain a lower onset potential as well as strong electron donor properties. Different molar ratio copolymers of BED-TT with 3,4-ethylenedioxythiophene (EDOT) was electrochemically synthesized, and the effects of changes in the amount of EDOT on the electrochemical and spectrochemistry properties of the copolymers were tracked. The resultant copolymer P(BED-TT- co -EDOT) was characterized via cyclic voltammetry, Raman, and spectroelecrochemistry. The study found that the amount of EDOT in the mixed system of BED-TT and EDOT can regulate the oxidation potential, electrochemical activity, and redox process of polymer films to a certain extent. The spectroelectrochemical results revealed that the copolymer P(BED-TT- co -EDOT) has a narrower optical band gap (1.63-1.67eV) and a richer electrochromic color (from pink purple, purple to gray blue, blue).
研究领域:
材料科学
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电化学
·
分析化学
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Yunfei Xie,Yingchao Zhang,Meihua Zhu,Ruonan Huang,Danming Chao
Despite the rapid advancement of electrochromic capacitive energy storage, there are still challenges in simultaneously improving electrochemical kinetics and cycling stability. Here we synthesize a new conjugated polymer bearing twisted EDOT-triphenylamine (TPA) dual-redox centers through facile electropolymerization . Benefiting from the multiple electroactive segments, the resultant polymer electrode reveals remarkable multicolor electrochromism (from yellow to green and blue) and concurrently good capacitive energy storage (high capacitance of 39 mF cm −2 ). The twisted alignment of the TPA structure facilitates ions diffusion and electrochemical reaction kinetics. Coupled with vanadium pentoxide ion-storage material, an assembled asymmetric electrochromic supercapacitor device (AESD) displays a high optical contrast of 71.37%, a wide voltage window of 2 V, the desirable energy density of 20.2 μWh cm −2 , and outstanding cycling durability (87% capacitance after 6000 cycles at 0.2 mA cm −2 ). This method and knowledge offered by density functional theory (DFT) provide another path toward improving electrochromic and capacitive performance in a synergetic manner.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 36
·50926
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IF 3.125
Haoran Xu,Yanjun Hou,Rui Li,Lijing Chang,Yang Ma,Shoulei Miao,Haijun Niu
Two donor units (D)-acceptor units (A) type monomers were synthesized by Stille coupling reaction, and then three D-A type hybrid polymers based on 3,4-ethylenedioxythiophene and various benzodiazoles were synthesized by electrochemical polymerization. Spectroelectrochemical and kinetic studies of these polymers showed that all polymer films exhibited excellent electrochromic behavior, obvious optical contrast, and excellent stability. Among them, the response time of P3 film was the shortest ( t c = 1.6 s, t b = 2.2 s), the coloring efficiency of P2 film was the highest ( CE = 333 cm 2 ·C −1 ), and the stability of P1 was the best (the ΔT loss of P1 after 1000 s cycles is only 2.3%). Therefore, these data prove that these new polymers have great potential in applications as electrochromic materials.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 39
·期 5
·537-544
·
IF 3.154
Lv Xiao-Jing,Xu Li-Bin,Qian Liang,Yang Yuan-Yuan,Xu Zhi-Yi,Li Jin,Zhang Cheng
An imidazolium-based ionic liquid (IL) modified triphenylamine derivative, namely 1-(4-((4-(diphenylamino)benzoyl) oxy)butyl)-3-methyl imidazole tetrafluoroborate (TPAC 6 IL-BF 4 ), was designed and synthesized, and further applied with 3,4-ethylene dioxythiophene (EDOT) to prepare conjugated copolymer P(EDOT:TPAC 6 IL-BF 4 ) via electrochemical polymerization. The cyclic voltammetry curves show that the copolymer P(EDOT:TPAC 6 IL-BF 4 ) possesses two pairs of redox peaks, which should be ascribed to the redox behaviors of EDOT and triphenylamine. The ultraviolet-visible (UV-Vis) absorption spectrum of P(EDOT:TPAC 6 IL-BF 4 ) exhibits one maximum absorption peak at 580 nm and a small shoulder characteristic peak at 385 nm under neutral state which are assigned to π-π * conjugated structure of EDOT and triphenylamine. After being applied at the positive voltage, the copolymer color changes from dark blue to light blue, which is close to the color of poly(3,4-ethylenedioxythiophene) (PEDOT). Surprisingly, the copolymer P(EDOT:TPAC 6 IL-BF 4 ) shows shorter switching time of 0.37 s, 0.30 s at 580 nm and 0.38 s, 0.45 s at 1100 nm compared with PEDOT. It is more intriguing that the copolymer P(EDOT:TPAC 6 IL-BF 4 ) exhibits electrochromism even in free supporting electrolyte. The results confirm that the existence of imidazolium-based ionic liquid has an improvement on the ion diffusion properties and the switching time of conjugated polymer, which may provide a potential direction for the preparation of high-performance electrochromic materials.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2014
·
IF 2.222
Jianxiong Li,Meijuan Zhang,Jie Liu,Yaxiao Ma
To synthesize conducting PEDOT coating on polyimide (PI), hydrolyzed PI film was immersed in H 2 O 2 , FeCl 3 , and EDOT solutions sequentially. The surface compositions of PI after H 2 O 2 immersion were analyzed with XPS and the content of introduced peroxide was determined by iodometry. The content of FeCl 3 adsorbed on PI was evaluated by ash method. The effect of the peroxide and FeCl 3 oxidants on the formation of PEDOT coating and the conductivity of the resultant PEDOT/PI were investigated. In H 2 O 2 solution, carboxylic groups on hydrolyzed PI transformed to peroxyacid groups at magnitude of mmol/m 2 . H 2 O 2 concentration promoted the formation of peroxyacid but depressed the adsorption of FeCl 3 . Attached peroxyacid alone could not initiate the oxidative polymerization of EDOT but could work as secondary oxidant with FeCl 3 together. It enhanced the oxidizing capacity of adsorbed FeCl 3 and led to more conducting PEDOT coating. The sheet resistance of PI film could decrease eight orders of magnitude to 400 Ω/□ after oxidative polymerization in EDOT solution. Without H 2 O 2 treatment, the sheet resistance could be reduced to several kΩ/□ only. The attached peroxyacid enhanced the efficiency of adsorbed FeCl 3 to the formation of conducting PEDOT coating greatly.
研究领域:
材料科学
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高分子化学
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表面工程
·
导电涂层
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 7
·4824-4834
·
IF 3.201
Guo Ye,Qianjie Zhou,Danqin Li,Yinxiu Zuo,Xuemin Duan,Weiqiang Zhou,Jingkun Xu
Freestanding flexible capacitive materials are ideal for use in bendable electronic devices. However, it is difficult to prepare pure PEDOT films in a freestanding state by chemical and electrochemical methods. Here, we used a simple strategy of introducing alkoxy, ether, ester, and amide chains for bridging two EDOT units to form precursors, which could then be electrodeposited readily to produce freestanding and flexible films. The precursor with the amide group was suitable for obtaining higher-quality films with improved thermal stability, mechanical properties, and capacitive performance. In addition, the asymmetric PBEDTA//PEDOT capacitors exhibited a capacitance retention rate of 98.5% after 5000 cycles, which is higher than those of PBEDTH//PEDOT (92.7%), PBEDTG//PEDOT (80.5%), and PBEDTE//PEDOT (86.8%) capacitors. This result indicates that the polymer films and, in particular, the PBEDTA films, are suitable for use in flexible supercapacitors.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 19
·3300
·
IF 4.329
Shuang Chen,Shukun Wang,Xin Xue,Jinsheng Zhao,Hongmei Du
As a class of redox active materials with some preferable properties, including rigid structure, insoluble characters, and large amounts of nitrogen atoms, covalent triazine frameworks (CTFs) have been frequently adopted as electrode materials in Lithium-ion batteries (LIBs). Herein, a triazine-based covalent organic framework employing 3,4-ethylenedioxythiophene (EDOT) as the bridging unit is synthesized by the presence of carbon powder through Stille coupling reaction. The carbon powder was added in an in-situ manner to overcome the low intrinsic conductivity of the polymer, which led to the formation of the polymer@C composite (PTT-O@C, PTT-O is a type of CTFs). The composite material is then employed in LIBs as anode material. The designed polymer shows a narrow band gap of 1.84 eV, proving the effectiveness of the nitrogen-enriched triazine unit in reducing the band gap of the resultant polymers. The CV results showed that the redox potential of the composite (vs. Li/Li+) is around 1.0 V, which makes it suitable to be used as the anode material in lithium-ion batteries. The composite material could exhibit the stable specific capacity of 645 mAh/g at 100 mA/g and 435 mAh/g at 500 mA/g, respectively, much higher than the pure carbon materials, indicating the good reversibility of the material. This work provides some additional information on electrochemical performance of the triazine and EDOT based CTFs, which is helpful for developing a deep understanding of the structure–performance correlations of the CTFs as anode materials.Keywords:lithium-ion battery;D-A type polymer;triazine;3,4-ethylenedioxythiophene
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2023
·Vol. 34
·期 8
·2541-2553
·
IF 3.4
Li-Ying Ren,Qian-Qian Li,Yu-Xia Zhang
The 3,4-ethylenedioxy thiophene (EDOT)-based conjugated microporous polymers (CMPs) were readily constructed via facile one-step direct arylation polymerication of C H from simple EDOT as a linker and commercially available aryl bromides of different geometries as the knots, without preactivation of C H bonds of aromatic building blocks using organometallic reagents. In contrast to conventional coupling reactions, this synthesis strategy not only has atomic efficiency but also can use simple thiophene derivatives as building blocks for synthesizing thiophene-based CMPs of different structures, which avoids the synthesis of complex thiophene derivatives and are important for applications, for example, fluorescent sensors. The resulting EDOT-based CMPs were used to fluorescent sensing to 2,4-dinitrophenol (DNP), I 2 , and p-nitrophenol (p-NP), with high optimal Stern-Volmer quenching constants.
研究领域:
材料科学
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化学
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环境监测
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产品关联
DOI
高影响因子
LANGMUIR
·
2014
·
IF 4.384
Xun Ma,Xiuyuan Ni
We used the photoexcited TiO2 films to initiate the copolymerization of 3,4-ethylenedioxythiophene with pyrrole, aiming to develop an organic/inorganic heterojunction. Specular reflection infrared spectroscopy analysis was used to monitor the process of polymerization and indicated that the copolymers directly grew on the TiO2 substrate. Dissecting the copolymers with ultraviolet photoelectron spectroscopy revealed the evolution of the valence-band electronic structures. Moreover, the resulting copolymer/TiO2 heterojunctions were investigated using electrochemical impedence and X-ray photoelectron spectroscopy. The Al/poly(3,4-ethylenedioxythiophene-co-pyrrole)/TiO2/ITO heterojunction device that was prepared from the hybrid film exhibited a conspicuous rectification. The heterojunction device was also explored with respect to the conduction models.
研究领域:
材料科学
·
高分子化学
·
半导体物理
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2021
·Vol. 34
·期 2
·345-351
·
IF 3.223
Xiaofang Zhang,Jing Chen,Qia Wang,Bing Du,Gaochao Fan,Weidong Zheng,Haipeng Yang,Tailin Xu
Sarcosine level in serum is of important clinical significance in distinguishing prostate cancer. This work depicts an amperometric sarcosine biosensor with good anti-interference performance by electro-codepositing manganese phosphate, 3,4-ethylenedioxythiophene (EDOT) and indole-6-carboxylic acid (IA) on the glass carbon electrode. The prepared sarcosine biosensor has a wide linear detection range (1–55 μM) with a low detection limit of 0.11 μM. This work provides an anti-interference approach by controlling the surface charge density of the biosensor to sarcosine sensing, which has great potential to be used as point of care testing (POCT) device for the rapid detection of prostate cancer biomarkers.
研究领域:
生物医学工程
·
分析化学
·
癌症研究
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-10
·
IF 14.919
Wei Hongqiu,Lei Ming,Zhang Ping,Leng Jinsong,Zheng Zijian,Yu You
3D-printing tough conductive hydrogels (TCHs) with complex structures is still a challenging task in related fields due to their inherent contrasting multinetworks, uncontrollable and slow polymerization of conductive components. Here we report an orthogonal photochemistry-assisted printing (OPAP) strategy to make 3D TCHs in one-pot via the combination of rational visible-light-chemistry design and reliable extrusion printing technique. This orthogonal chemistry is rapid, controllable, and simultaneously achieve the photopolymerization of EDOT and phenol-coupling reaction, leading to the construction of tough hydrogels in a short time ( t gel ~30 s). As-prepared TCHs are tough, conductive, stretchable, and anti-freezing. This template-free 3D printing can process TCHs to arbitrary structures during the fabrication process. To further demonstrate the merits of this simple OPAP strategy and TCHs, 3D-printed TCHs hydrogel arrays and helical lines, as proofs-of-concept, are made to assemble high-performance pressure sensors and a temperature-responsive actuator. It is anticipated that this one-pot rapid, controllable OPAP strategy opens new horizons to tough hydrogels.
研究领域:
材料科学
·
化学工程
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）