NANOTECHNOLOGY
·
2021
·Vol. 32
·期 30
·305401
·
IF 3.874
Shuzhen Xu,Huilian Hao,Yinan Chen,Wenyao Li,Wenzhong Shen,Paul R. Shearing,Dan J. L. Brett,Guanjie He
Polypyrrole (PPy) has high electrochemical activity and low cost, so it has great application prospects in wearable supercapacitors. Herein, we have successfully prepared polypyrrole/reduced graphene oxide (PPy/rGO) nanocomposite cotton fabric (NCF) by chemical polymerization, which exhibits splendid electrochemical performance compared with the individual. The addition of rGO can block the deformation of PPy caused by the expansion and contraction. The as-prepared PPy-0.5/rGO NCF electrode exhibits the brilliant specific capacitance (9300 mF cm−2 at 1 mA cm−2) and the capacitance retention with 94.47% after 10 000 cycles. At the same time, the superior capacitance stability under different bending conditions and reuse capability have been achieved. All-solid-state supercapacitor has high energy density of 167 μWh cm−2 with a power density of 1.20 mW cm−2. Therefore, the PPy-0.5/rGO NCF electrode has a broad application prospect in high-performance flexible supercapacitor fabric electrode.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiaoyang Zhang,Xuefei Zhang,Hai-Tao Ren,Ting-Ting Li,Ching-Wen Lou
Harvesting energy from naturally abundant water resources is expected to alleviate the need for the current energy shortage. However, existing studies rarely consider the effect of capacitors on the output of hydropower generation. Here, inspired by capacitors, we prepared a flexible and efficient hydrovoltaic generator by loading polypyrrole (PPy) and Ti 3 C 2 Tx MXene onto cotton fabrics by a simple green one-step synthesis method with self-assembly. Specifically, the ionic imbalance at the interface can be exacerbated by the use of expanded capacitance, while synergistically the two materials PPy/MXene will adsorb different ions, which promotes efficient adsorption of ions and ensures energy conversion. This generator can produce an open-circuit voltage (V OC ) of 0.35 V and a short-circuit current (I SC ) of ~260 μA in just 5 mL of a 3.5 wt% NaCl solution, and the optimized device can achieve an output power of 35.76 μW. Furthermore, this capacitance-enhanced fabric-based hydrovolt generator can directly power electronic devices and demonstrates its potential future applications in practical applications such as respiratory monitoring and touch sensing.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Ting Shu,Yuliang Zhang,Xiahui Liu,Zhuo Liu,Ying Qin,Fei Wang,Xueting Chang,Dongsheng Wang,Lihua Dong,Xiaobo Chen,Xijia Yin,Zecheng Qian
Solar interfacial evaporation technology is an effective and sustainable method for seawater desalination. It is crucial to achieve high photothermal conversion efficiency, rapid evaporation rate, and long-term stability. In this study, a vertically aligned porous aerogel evaporator is prepared using sodium alginate as the substrate material and graphene oxide (GO) and polypyrrole (PPy) as the photothermal materials through a directional freezing technology. The polypyrrole@graphene oxide-sodium alginate evaporator exhibits a high solar photothermal conversion efficiency as high as 98.6 % and an evaporation rate of up to 4.66 kg·m −2 ·h −1 under 1 sun. During the 144-hour desalination, the evaporator transports brine for evaporation in the daytime and removes salt residue from the evaporator surface at night. It has demonstrated a self-cleaning behavior and restored its desalination stability. Thus, this aerogel evaporator with a high evaporation rate and stable salt resistance shows great potential for practical applications in solar thermal conversion and seawater desalination.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yingdong Wu,Yan Wang,Pei Zhu,Xiao Ye,Ruonan Liu,Wangfeng Cai
Effective controllable manufacturing oxygen vacancy and polypyrrole coating can optimize the capacitive and cyclic properties of Co 3 O 4 . Herein, composition of O v -Co 3 O 4 @PPy with Co 3 O 4 rich in oxygen vacancy defects and polypyrrole was synthesized using NaBH 4 reduction and chronoamperometry. O v -Co 3 O 4 was synthesized while regulating the concentration of the reducing agent NaBH 4 solution, and then O v -Co 3 O 4 @PPy was synthesized by electrodeposition of PPy. The specific capacitance of O v -Co 3 O 4 @PPy formed at an optimal NaBH 4 concentration and electrodeposition time was about three times that of Co 3 O 4 without reduction treatment and unwrapped PPy. The capacitance retention rate of O v -Co 3 O 4 @PPy was close to 80.5% after 5000 cycles. In addition, O v -Co 3 O 4 @PPy//AC asymmetric supercapacitor was assembled with the as-prepared O v -Co 3 O 4 @PPy as the positive electrode material and activated carbon as the negative electrode, which yielded specific energy density up to 74.55 Wh kg −1 at 850 W kg −1 power density and a capacitance retention rate close to 110% after 10,000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2023
·Vol. 25
·期 2
·437-445
·
IF 2.5
Huang Peijun,Liu Yan,Chen Zhuoming,Zheng Yuansheng,Vasilovna Khammatova Venera,Faritovich Gainutdinov Ruslan,Xin Binjie
Polypyrrole (PPy) is one of the most widely researched conductive polymers due to its high electrical conductivity, good thermal and environmental stability, oxygen resistance, heterocyclic structure, non-toxicity, and simple synthesis method, and is an excellent candidate for electric heating materials. For better application in textile heating, a polyurethane (PU) film is used as a substrate and dopamine (PDA) is used as a multifunctional platform for the secondary reaction on the film to immobilize the polypyrrole on the surface of the film, making it a smart wearable element. By varying the amount of PPy to control its direct oxidative polymerization reaction, materials with good electrical conductivity and flexibility were obtained. It has a fast electrothermal response at low operating voltages (up to 118 °C after 20 s at 5 V), good flexibility, light weight and uniform heat distribution. It has significant advantages compared to other electrical heating materials.
研究领域:
材料科学
·
高分子科学
·
电气工程
·
纳米技术
·
化学合成
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2017
·Vol. 4
·期 5
·1135-1140
·
IF 4.136
Hongxiu Dai,Meng Lin,Nan Wang,Fei Xu,Donglei Wang,Houyi Ma
Graphical Construction zone : The Co 3 O 4 /PPy nanostructure possesses structural features of a nanowire core and nanosheet shell grown directly on a nickel foam substrate by electrochemical deposition processes. The PPy nanowires are introduced onto the nickel foam, which create a three-dimensional structure and the Co 3 O 4 nanosheets shell act as a catalyst for the electro-oxidation of glucose. Cobalt oxide nanosheets (Co 3 O 4 NSs)/polypyrrole nanowire (PPy NW) core-shell nano-heterostructures based on nickel foam (NF) were fabricated for electrochemical non-enzymatic glucose determination. The Co 3 O 4 /PPy nanostructures grew directly on nickel foam substrate by electrochemical deposition processes. The PPy NW core and the Co 3 O 4 NS shell constructed the hierarchical nanocomposites to form a three dimensional micro−nanostructure in the micropores of NF. The as-prepared Co 3 O 4 /PPy/NF heterostructures were characterized by using scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The introduction of the Co 3 O 4 NSs can provide a high surface area and lead to high sensitivity to glucose. Chronoamperometry was used to evaluate the sensitivity of the sensor toward glucose. Compared with NF, PPy/NF, and Co(OH) 2 /PPy/NF electrodes, the Co 3 O 4 /PPy/NF electrode exhibited higher electrocatalytic activity for the oxidation of glucose, and the proposed glucose sensor showed linear electrochemical responses to glucose with a low detection limit of 0.74 μM (S/N=3). In addition, the prepared biosensor revealed good selectivity in the presence of electro-active species such as d -fructose, uric acid, ascorbic acid and hydrogen peroxide, and provided an excellent platform for the determination of glucose in human urine samples.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 17
·7042-7050
·
IF 3.288
Jingjing Yuan,Lin Wang,Bo Xu,Ping Wang,Jiugang Yuan,Yuanyuan Yu,Chao Deng,Qiang Wang
Silk fibroins (SFs) have many attractive properties; however, the practical applications of pure fibroin materials are severely restricted by their low elasticity. To improve flexibility of regenerated SF membranes, carboxyl-terminated polyethylene glycol (cPEG) was introduced into fibroin chains using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS). Subsequently, laccase-mediated graft polymerization of polypyrrole (PPy) onto the SF-g-cPEG membrane was performed to achieve electrical conductivity. The results implied that cPEG was successfully grafted onto the SF chains; the elongation at break of the SF-g-cPEG membrane increased by three times compared to that of the untreated one. Meanwhile, the introduced cPEG promoted the binding of pyrrole radical cations onto fibroin membrane, resulting in an efficient deposition of a PPy conductive layer during the laccase treatment. Conductivity of the membrane of SF-g-cPEG/PPy meets the standard of conductive materials even after 48 cycles of bending testing. In addition, the composite membrane has acceptable in vitro biocompatibility. The present work provides a novel alternative for fabrication of flexible and conductive SF biomaterials, which would expand the applications of fibroin materials in wearable electronics.
研究领域:
生物材料学
·
高分子化学
·
酶工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Smart and Nano Materials
·
2023
·
IF 3.9
Bingkun Tian,Xiaofeng Jiang,Weicun Chu,Chunxiao Zheng,Wanlin Guo,Zhuhua Zhang
Developing high-performance nanostructured materials is key to deliver the potential of hydrovoltaic technology into practical applications. As single-component materials have approached its limit in generating hydrovoltaic electricity, the development of multi-component hydrovoltaic materials has been necessary in continuously boosting the electricity output. Here, we report a hydrovoltaic material by integrating reduced graphene oxides and polypyrrole nanoparticles (rGO/PPy), where the rGO contributes improved conductivity and large specific surface area while PPy nanoparticles enable enhanced interaction with water. The device fabricated with this material generates a short-circuit current of 6 μA as well as a maximum power density of over 1 μW/cm3 from natural evaporation of water. And the substantial ion–PPy interaction enables robust voltage generation from evaporation of various salt solutions. Moreover, an outstanding scaling ability is demonstrated by connecting 10 devices in series that generate a sustainable voltage of up to ~2.5 V, sufficing to power many commercial devices, e.g. LED bulb and LCD screen
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 6
·1-15
·
IF 2.8
Xiao Lijuan,Zhou Jingkai,Yu Zhixuan,Dong Huihao,Chen Yan
In the research of flexible smart electronics, obtaining particular structure electrodes to provide excellent electrochemical performance remains challenging. Here we report the synthesis and characterization of nanocomposite by a two-step method of polypyrrole (PPy) with Co 3 O 4 @SiO 2 in the presence of an oxidizing agent. Co 3 O 4 @SiO 2 was prepared by firing SiO 2 -coated zeolitic imidazolate framework-67 (ZIF-67/SiO 2 ) in a tubular furnace at a high temperature. Subsequently, PPy was coated and dispersed on Co 3 O 4 @SiO 2 by chemical methods at room temperature. In addition, we also explored the optimal ratio experiment of Co 3 O 4 @SiO 2 and PPy. The results show that the specific capacitance of Co 3 O 4 @SiO 2 and Co 3 O 4 @SiO 2 /PPy (2 mL) is 33.36 A/g and 107.7 A/g, at 0.6 A/g current density, indicating that the addition of PPy greatly improves the electrochemical performance of Co 3 O 4 @SiO 2 . This may be due to synergies between Co 3 O 4 @SiO 2 and PPy polymers, and the addition of PPy may help Co 3 O 4 @SiO 2 to construct more ion channels to enhance ion transport. This report will contribute to the development and application of cobalt oxide and silicon-shell electrode materials in the field of energy storage. It is helpful for the development and application of cobalt oxide and silicon-shell structures as electrode materials in the field of energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 10
·6507-6521
·
IF 5.7
Fan Lingling,Zheng Wenfeng,Yang Yuan,Sun Yan,Peng Songlin,Xu Jie,Yin Guangfu
Bacterial cellulose (BC)/polypyrrole (PPy) nanofibrous composites have been extensively studied in supercapacitors owing to their large specific surface area and excellent tensile strength. However, the inferior cycling stability due to structural pulverization of PPy impedes their potential applications. Herein, nanofibrous composite membranes of MXene, PPy and oxidized BC (TOBC) were prepared for flexible supercapacitor electrodes. The C6 primary hydroxyl groups of BC nanofibers were oxidized into aldehyde or carboxyl groups. Due to the enhanced interaction of TOBC with PPy and MXene, the TOBC nanofibers were horizontally wrapped on the MXene nanosheets and PPy was homogeneously deposited on the TOBC nanofibers. The flexible solid-state supercapacitors fabricated with the MXene@TOBC@PPy (TMP) electrodes achieved an areal specific capacitance of 928.9 mF cm −2 at 0.7 mA cm −2 and a capacitance retention of 85.5% after 5000 cycles. Therefore, the TMP electrodes could be a promising electrode material for flexible supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 15
·6723-6732
·
IF 2.7
Min Sun,Yu Zhang,Zhijun Liang,Rui Zhang,Kai Zhang,Yanhong Lin,Dejun Wang,Tengfeng Xie
Supercapacitors often deliver a significantly high-power density with a long cycling life but low energy density. An exceedingly promising approach is to construct asymmetric supercapacitors (ASCs) reconciling the compromise between power density and energy density. However, ASCs combining transition metal oxides (TMOs) and activated carbon (AC) struggle to improve energy density due to a vast difference in their specific capacitance. To cross this hurdle, we first proposed a new strategy to construct the ASCs with α-MoO3 as the anode and conductive polymer polypyrrole (PPy) as the cathode. The remarkable features of α-MoO3, including its layered structure and ultra-high specific capacitance, along with the stability and fast charge–discharge ability of PPy, have contributed significantly to the augmentation of power density and energy density in ASCs. Taking advantage of these bright features, the operation voltage for α-MoO3//PPy is effectively expanded to 2.0 V, exhibiting a high energy density of 25.9 W h kg−1 at 1538 W kg−1. Furthermore, the energy density presented a remarkable recovery rate, reaching 91.04% of its initial state after undergoing full rate tests. These conclusions reveal that the construction of α-MoO3//PPy can effectively enhance the energy density and power density of supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Advanced Fiber Materials
·
2024
·
IF 17.2
Liu Jiaxin,Qi Shuo,Wang Hongshan,Fu Chiyu,Xu Weilin,Su Bin,Tang Wenyang,Xia Zhigang
Wearable electromagnetic interference (EMI) shielding devices are highly demanded to reduce the endlessly emerging EM pollution. Undesired durability and limited scale-up production capacity are the main obstacles to hinder the industrialized application of flexible EMI wearables. Here, a scalable Fe 3 O 4 /polypyrrole (PPy) embedded cotton/polypropylene (FP@CP) fabric is introduced for EMI shielding and Joule heating, which is achieved by a unique particle flow spinning method. This method can continually manufacture functional yarns in large quantities, followed by weaving into fabrics. The core-sheath yarn structure can highly embed Fe 3 O 4 /PPy shielding layer by polypropylene (PP) strips, which protects internal functional components from leakage or damage by the environment. Consequently, the obtained fabrics present greater durability (50 washing and 465 abrasion cycles) in comparison with most reported EMI devices. The EMI shielding mechanism was investigated through both experimental and simulation methods. It suggests that the combination of EMI reflection and absorption modes synergistically contributes to enhancing the EMI shielding property of obtained fabrics, reaching a maximum total shielding effectiveness (SE T ) of 47 dB. Besides, the composite fabric achieves a high Joule heating temperature to 105 ℃ at 3 V within 10 s due to its efficient electric-thermal property. This work paves a cost-effective way to realize scale-up manufacturing of versatile EM protection textiles to be applied in daily, military and aerospace fields. Graphical
研究领域:
材料科学
·
纺织工程
·
电子工程
✓ 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）