JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 20
·17367-17373
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IF 2.324
Tian Zi-Han,Liu Hai-Hui,Wang Ning,Liu Yan-Xin,Zhang Xing-Xiang
Poly (3,4-ethylenedioxythiophene) nanowires (PEDOT NWs) with high electric conductivity were synthesized by a facile self-assembled micellar soft-template method. And then, Bi 2 Te 3 powders and Bi 2 Te 3 nanowires (Bi 2 Te 3 NWs) were added as inorganic filler to form the PEDOT NWs/inorganic nanocomposite films by a simple and convenient vacuum filtration method. The thermoelectric (TE) properties of the flexible films were characterized. PEDOT NWs film exhibited the high σ value of 249.5 S cm −1 and does not require any treatment at room temperature. By incorporating both Bi 2 Te 3 powders and Bi 2 Te 3 NWs into these PEDOT NWs, the power factor of the polymer/inorganic composite materials is enhanced. The resulting PEDOT NWs/Bi 2 Te 3 powders nanocomposite film exhibited a high power factor of 7.49 µW m −1 K −2 compared to that of 2.54 µW m −1 K −2 in PEDOT NWs. A maximum power factor of 9.06 µW m −1 K −2 is obtained from the PEDOT NWs/Bi 2 Te 3 NWs composite film containing 10 wt% Bi 2 Te 3 NWs at room temperature, which is about 3 of times that of the pure PEDOT NWs film. These composites provide a promising route to flexible and high-performance thermoelectric materials.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Minzhi Du,Xinyi Chen,Kun Zhang
Ionic liquids (ILs) have been reported to modulate the thermoelectric properties of conducting polymers. However, there is still a lack of comprehensive understanding of the effects of ILs on their thermoelectric transport. Herein, we selected 1-ethyl-3-methylimidazolium dicyanamide (EMIM:DCA) to post-treat free-standing PEDOT nanowire (NW) films and the effects on thermoelectric performance were fully explored. EMIM:DCA post-treatment simultaneously increases the Seebeck coefficient (87% increment) and electrical conductivity (24% increment) of PEDOT NWs, resulting in an optimal power factor of 83.8 μW m–1 K–2 at room temperature. It demonstrates the first ever-reported free-standing IL/polymer composites and outperforms the majority of all IL/polymer composites. Based on experimental characterizations, we elucidate that IL-induced dedoping and the Soret effect synchronously determine the Seebeck coefficient enhancement, where the Soret effect plays a dominant role, accounting for 79.9% for PEDOT NW films with 80 wt % EMIM:DCA. By means of X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), and X-ray diffraction (XRD), we further confirm that IL-induced dedoping contributes to phase segregation and compact stacking of PEDOT chains, resulting in lowered carrier concentration for the enhanced Seebeck coefficient and facilitating carrier transport for higher electrical conductivity. More importantly, through Kang–Snyder transport modeling, we first find that the improved transport coefficient (σE0) by IL-induced dedoping also contributes to the Seebeck coefficient enhancement, shedding light on the mechanism that can be adopted to design high-performance thermoelectric materials with conducting polymers.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 56
·33965-33971
·
IF 3.119
Haihui Liu,Pengfei Liu,Mengqi Zhang,Zihan Tian,Ning Wang,Yanxin Liu,Xingxiang Zhang
Light-weight, mechanically flexible, transparent thermoelectric devices are promising as portable, and easy-to-integrate energy sources. Poly(3,4-ethylenedioxythiophene) nanowires (PEDOT NWs) possessing high electrical conductivity were synthesized by a facile self-assembled micellar soft-template method. And then, Te nanowires (Te NWs) with high Seebeck coefficient were easily synthesized by the solution process and then added as an inorganic filler to form the PEDOT NW/Te NW nanocomposite films via a simple and convenient vacuum filtration method. The thermoelectric (TE) properties of the nanocomposites were characterized in this research. A maximum power factor of 58.03 μW m−1 K−2 is obtained from the film containing 90 wt% Te NWs at room temperature, which is dozens of times that of the pure PEDOT NW film. This work uses the as-prepared PEDOT NWs/Te NW (90 wt%) nanocomposite film to fabricate a flexible thermoelectric generator and an output voltage of 2.8 mV was generated at a temperature difference of 13.5 K between the environment and human body.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Minzhi Du,Kun Zhang
Transition-metal-oxide-based electrochemical electrodes usually suffer from poor electron and ion transport, leading to deteriorated rate performance and cycling stability. Herein, we address these issues by developing a facile “conducting encapsulation” strategy toward a nanoporous PEDOT nanowire/MnO2 nanoparticle/PEDOT nanowire composite electrode. Through encapsulation of the PEDOT nanowire network, the overall electrochemical performance of the resultant composite electrode is substantially enhanced. Specifically, the rate capability and capacitance retention are improved by ∼48.2 and ∼33%, respectively, which are 89.8% at 0.8–40 mA/cm2 and 93% after 3000 charge/discharge cycles at 2.0 mA/cm2, respectively. Moreover, the specific capacitance is increased by ∼6 times of that of the MnO2@PEDOT NW electrode at ∼200 mA/cm2. We find that a nanoporous conducting nanowire network that encapsulates a MnO2 nanoparticle layer can provide efficient electron and ion transport paths and stabilize the structure of MnO2 from collapse during charge/discharge cycling and mechanical deformation. This strategy can be applied to other pseudocapacitive material-based electrochemical electrodes, such as transition-metal oxides and conducting polymers.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
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2021
·
IF 9.676
Wenna Liu,Xiaoxiao Li,Weijun Li,Yumin Ye,Hong Wang,Peipei Su,Weiyou Yang,Ya Yang
Conductive polymers as one of the candidate materials with pseudocapacitor behavior have inspired wide attentions, because of their high conductivity, flexibility, low cost and excellent processability. However, the intrinsically poor cycling stability induced by the volume change over the doping/dedoping redox process limits their practical applications. Herein, we report the exploration of electrodes with robust cycling capacity for supercapacitors (SCs), which are rationally designed by coating conductive poly(3,4-ethylenedioxythiophene) (PEDOT) around free-standing SiC nanowires using an all-dry oxidative chemical vaper deposition (oCVD) method. The as-constructed SiC@PEDOT nanowire architecture enables a specific capacitance of 26.53 mF/cm 2 at 0.2 mA/cm 2 , which is ~370% to that of SiC nanowire counterpart (7.04 mF/cm 2 ). Moreover, their aqueous-based SCs exhibit robust cycling stability with 104% capacity retention after 10000 cycles, which is among the highest values achieved for PEDOT-based SCs.
研究领域:
材料科学
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电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2022
·
IF 3.407
Yao Wang,Yuedan Wang,Rufeng Zhu,Yang Tao,Yuanli Chen,Qiongzhen Liu,Xue Liu,Dong Wang
Fiber based organic electrochemical transistors (FECTs) functionalized with poly(3, 4-ethylenedioxythiophene)/multiwalled carbon nanotube channel as transducer have been developed to detect ultralow concentration of potassium ions in the human body. Here, MWCNT increases the specific surface area and reaction sites of the cotton fiber, and induces a uniform and dense conductive network of PEDOT nanowires on the fiber, which greatly improves the performance of FECTs. In addtion, it can still maintain superior transistor performance under different bending degrees. The performance of ion sensors based on FECTs is systematically investigated. K + can be detected in the range of 1–1000 nM with fast response and good reproducibility. Furthermore, the sensor combined with ion selective membrane has excellent anti-interference ability. The practical applicability of the sensor for K + detection in artificial saliva has been verified. The sensors can also be integrated into fabric by hand-weaving, which providing a promising platform for convenient wearable healthcare monitoring.
研究领域:
生物医学工程
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材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）