Materials Today Communications
·
2023
·
IF 3.8
Xianhong Zheng,Peng Wang,Binbin Ding,Jinhao Tang,Xinghua Hong,Zhi Liu,Wen Xia,Xiaoshuang Zhou,Zongqian Wang,Lihua Zou,Changlong Li
Stretchable electrical conductors hold great promise in the wearable electronic devices, such as flexible display and human-machine interface. Stable conductivity is vital for wearable devices to maintain their stable performance. However, the electrical resistance of most reported yarns dramatically increases when they are deformed. Herein, we propose a design for a coaxial-helix structure by wrapping the polyaniline/MXene-based elastic core-spun yarn on itself in the form of coils. The fabricated coaxial-helix structured yarns (DCSs) exhibit excellent strain-insensitive properties, including low relative resistance change (25.4%), large strain (200%) and high quality factor (17.95). Moreover, the DCSs can be used as the stretchable electrodes for the supercapacitors , and delivers a linear specific capacitance of 256.7 mF cm −1 , which is higher than most stretchable yarns. Therefore, the proposed coaxial-helix structure design creates a new approach for the strain-insensitive stretchable conductor, thereby paving the way for the development of stretchy electronics.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 17
·1-20
·
IF 2.8
Qi Zhijia,Zhang Shengsheng,Huang Jiaju,Li Juan,Jiang Junjiong,Fan Ping,Yang Jintao
Flexible PVDF-based piezoelectric nanogenerators (PENGs) are promising mechanical energy harvesters for powering wearable devices and portable electronics. In this work, a new hybrid nanocomposite was prepared by coating polyaniline on the surface of halloysite nanotube (HNT@PANI) and PENGs were fabricated by using electrospun nanocomposite fiber mats comprising HNT@PANI and poly(vinylidene fluoride) (PVDF). The rough surface of PANI outer layer and its electronegative properties favors a large interface and a strong interfacial interaction with PVDF matrix, which efficiently improves the β-phase crystal content and the crystallinity of PVDF simultaneously, resulting in an enhanced output performance in the fibrous nanocomposite PENGs. When the nanocomposite fiber mats are composed of 1 wt% HNT@PANI nanoparticles, the open-circuit voltage of the PENG is up to 30 V, which is six times higher than that of pure PVDF, and it can also light up 17 red LEDs. Furthermore, the open-circuit voltage was found unchanged after being subjected to continuous tapping for 5 weeks in the durability test. In addition, the PENG can charge a capacitor to 4.4 V within 60 s. This flexible self-powered PENG with good durability and high outputs has the potential to be used as a self-charging power source and applied in the field of wearable flexible electronic devices.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiaorong Gan,Jianlin Zhang,Jiabei Liu,Yuanhe Bai,Xinyi Su,Weiqing Wang,Zhuang Cao,Huimin Zhao,Yanhui Ao,Peifang Wang
Simultaneously improving electron and mass transfer processes is full of challenges for electrode material design. To this end, three-dimensional (3D) porous electrode materials were obtained via covalent combination between defective 1T-MoS2 nanosheets and polyaniline (PANI) through hydrothermal/solvothermal processes and surface polymerization reactions. Our experimental results and density functional theory calculations jointly reveal that PANI molecules can not only intercalate into van der Waals (vdW) gaps of 1T-MoS2 nanosheets but also chemically adsorb onto S-vacancy clusters (via Mo–N covalent bonds), rather than single atomic S-vacancies due to steric effects. Similarly, the geometric structure of PANI in the vdW gaps of 1T-MoS2 nanosheets possesses a flat-lying configuration for better stability. Compared to surface functionalization, interlayer intercalation has more profound effects on electronic structures for improving electrochemical properties, including reduced band gaps, small effective electron masses, and high mobility. As a proof-of-concept application, the 1T-MoS2–PANI nanocomposites were used to construct an electrochemical sensor for trace Cu2+, which exhibits high sensitivity and selectivity with a wide linear range from 3 to 450 nM and a low detection limit because of excellent conductivity, a low contact barrier against electron transfer, high mass transfer, and strong coordination interactions between PANI and Cu2+.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Dingqiang Liang,Ziyang Chang,Yanguang Chen,Jianbin Chen,Huifang Zhao,Lizheng Sha,Daliang Guo
With the rapid expansion of the flexible electronics market, it is critical to develop high-performance flexible energy storage electrode materials. Cellulose fibers , which are sustainable, low cost, and flexible, fully meet the requirements of flexible electrode materials, but they are electrically insulating and cause a decrease in energy density. In this study, high-performance paper-based flexible electrode materials (PANI:SSA/Zr-CFs) were prepared with cellulose fibers and polyaniline. A high mass loading of polyaniline was wrapped on zirconia hydroxide-modified cellulose fibers under metal-organic acid coordination through a facile in situ chemical polymerization process. The increase in mass loading of PANI on cellulose fibers not only improves the electrical conductivity but also enhances the area-specific capacitance of the flexible electrodes. The results of electrochemical tests show that the area specific capacitance of the PANI:SSA/Zr-CFs electrode is 4181 mF/cm 2 at 1 mA/cm 2 , which is more than two times higher than that of the electrode with PANI on pristine CFs. This work provides a new strategy for the design and manufacture of high-performance flexible electronic electrodes based on cellulose fibers.
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PubMed
高影响因子
ACS Nano
·
2022
·
IF 18.027
Chaojie Yu,Zhiwei Yue,Mingyue Shi,Lijie Jiang,Shuang Chen,Mengmeng Yao,Qingyu Yu,Xiaojun Wu,Hong Zhang,Fanglian Yao,Changyong Wang,Hong Sun,Junjie Li
Although hydrogel-based patches have shown promising therapeutic efficacy in myocardial infarction (MI), synergistic mechanical, electrical, and biological cues are required to restore cardiac electrical conduction and diastolic–systolic function. Here, an injectable mechanical–electrical coupling hydrogel patch (MEHP) is developed via dynamic covalent/noncovalent cross-linking, appropriate for cell encapsulation and minimally invasive implantation into the pericardial cavity. Pericardial fixation and hydrogel self-adhesiveness properties enable the MEHP to highly compliant interfacial coupling with cyclically deformed myocardium. The self-adaptive MEHP inhibits ventricular dilation while assisting cardiac pulsatile function. The MEHP with the electrical conductivity and sensitivity to match myocardial tissue improves electrical connectivity between healthy and infarcted areas and increases electrical conduction velocity and synchronization. Overall, the MEHP combined with cell therapy effectively prevents ventricular fibrosis and remodeling, promotes neovascularization, and restores electrical propagation and synchronized pulsation, facilitating the clinical translation of cardiac tissue engineering.
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Lili Xu,Shuai Liu,Ling Yu,Kuiling Li,Yong Zhang,Jianbing Wang,Jun Wang
The conventional membrane technology provides an effective solution for ion separation. However, the traditional membrane is not able to tune the permselectivity during operation, and has inherent drawbacks of permeance and selectivity trade-off. In view of this, the purpose of this project is to realize controllable ion transport without impeding water filtration through electrically responsive membrane (ERMs) under electrical assistance. To achieve this, we developed electrically responsive membranes with different electrical conductivities and surface charge properties by incorporating multi-walled carbon nanotubes (CNTs) and different acids doped polyaniline (PANI). The external potential was supplied to create tuneable electrostatic interactions between surface charged ERMs and ions, which was expected to regulate and control ion transport. It was found that the developed ERMs exhibited improved rejection without decreasing the water permeance under applied potential. The responsiveness of ion rejection to the electrical potential was affected by the combined effect of charge density and electrical conductivity. The calculations based on the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory suggested that imposing an external voltage increased the surface potential of ERMs and thus improved the electrostatic repulsive force between ERMs and ions, resulting in improved ion rejection. It is believed that this simple and feasible strategy for fabrication of ERMs has a potential for practical applications in tunable ion separation.
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LANGMUIR
·
2022
·
IF 4.331
Jingjing Xiong,Zetao Zhu,Wenkai Ye,Liwen Mu,Xiaohua Lu,Jiahua Zhu
Both electrical conductivity and surface wettability are required for the selection of active carbon materials in flow-electrode capacitive deionization, while a trade-off exists between these two properties. In this work, a hybrid material with a thin layer of polyaniline (PANI) coating on activated carbon (AC/PANI) was successfully developed to retain excellent electrical conductivity and acquire good surface wettability. By adjusting the dosage of initiator, AC/PANI composites with different loading fractions of PANI were obtained. The electrochemical testing demonstrated that the AC/PANI composites have higher specific capacitance and lower ion diffusion resistance compared to pure AC, resulting in better desalinization performance. Specifically, with a feed concentration of 1600 mg/L, excellent adsorption capacity and high charge efficiency can be simultaneously achieved at 13.51 mg/g and 92.21%, respectively. Benefiting from the formation of a continuous electrical percolation network and reduced solid/liquid interfacial transport resistance, a 39% enhancement of average salt adsorption rate (from 0.54 to 0.75 μmol/min/cm2) was obtained.
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PubMed
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JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Ze Wang,Pei Shi,Qin Liu,Jingying Li,Yi Gan,Jia Yao,Jinghong Xia,Xin Liu,Xin Chen,Ke Qian,Xiang Liu,Lin Lv,Guokun Ma,Li Tao,Jun Zhang,Hanbin Wang,Houzhao Wan,Hao Wang
Alkaline nickel-zinc batteries have attracted more attention due to their inherent safety and high specific energy. However, the cycling stability of Ni–Zn batteries is still an urgent problem. Herein, we fabricate the Ni 12 P 5 @PANI core-shell structure by polyaniline cladding on the Ni 12 P 5 nanowires . The polyaniline not only effectively improves the specific capacity of Ni 12 P 5 , but also greatly enhances the cyclic stability. The optimized Ni 12 P 5 @PANI nanowires provide a specific capacity of 272.8 mAh g −1 at 1 A g −1 (189.2 mAh g −1 at 10 A g −1 , 69.4% retention rate) and long-life cycling (93% capacity retention after 1000 cycles at 10 A g −1 ). Moreover, the theoretical calculations indicate that the polyaniline is easy to polymerize on the surface of Ni 12 P 5 , and the lower formation energy verifies that the polyaniline shell layer can effectively promote the structural stability of Ni 12 P 5 , thus enhancing the cycle life. In addition, the assembled Ni 12 P 5 @PANI//Zn battery retains 112.3% capacity retention after 500 cycles at 3 A g −1 , and provides a high energy density of 287.9 Wh kg −1 and power density of 49.1 kW kg −1 (based on the mass of active substance). This work provides a feasible high-rate and durable cathode material for alkaline Ni–Zn batteries.
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JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 18
·3049-3059
·
IF 2.909
Ma Chang,Xu Chengcheng,Meng Qingfang,Yang Haili,Xie Rui,Zhang Huiping,Tu Haoyu,Zhao Yueqiang,Wang Mingyan,Xu Guoxiang,Zhu Jing
In this paper, with cellulose microsphere as the substrate, a polyaniline/cellulose composite was prepared by means of in situ polymerization in supercritical CO 2 (SCCO 2 ) environment, and the effect of experimental pressure, temperature, and reaction time on the morphology and electrochemical properties of the composite were explored. In addition, the electrochemical properties of the composite were compared with the one prepared under normal temperature and pressure condition (NPT). The results show that the polymerization time of aniline in SCCO 2 is greatly shortened comparing with chemical oxidation of 6 h, and the capacitance of the composite prepared in SCCO 2 can reach 391 F·g −1 at the scanning rate of 5 mV·s −1 , which is higher than 286 F·g −1 under NPT. After 300 charge–discharge cycles, the capacitance retention of the composite prepared in SCCO 2 and NPT are 91% and 83%, respectively. The stability of the composite material prepared in SCCO 2 is significantly improved. Graphical abstract
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Materials Research Express
·
2022
·Vol. 9
·期 9
·095101
·
IF 2.025
Haibo Chen,Xingli He,Xiaolong Yang,Peng Li,Weibing Wu
Conjugated polymer (CPs) has good near infrared (NIR) absorption and high photothermal conversion effect, which is one of the most promising photothermal therapy (PTT) drugs for cancer therapy. Through the combination of hydrophobic conjugate component of aniline trimer (AT) and hydrophilic component of aldehyde polyethylene glycol (PEG-CHO), linear polymer (PEG-AT-PEG) is synthesized via Schiff base reaction. Self-assembly nanoparticles simply precipitated out by dropping the tetrahydrofuran solution of PEG-AT-PEG into deionized water under ultrasonic dispersion. Owing to the rigid hydrophobic conjugated structure in the middle and the hydrophilic long chain structure at both ends, the long chain material can undergo hydrophobic association and π–π stacking in deionized water to form spherical organic nanoparticle. Such self-assembly nanoparticles have strong NIR absorption at 700 ∼ 800 nm, and can significantly increase the temperature in a short time upon continuous 808 nm laser irradiation, showing good photothermal conversion efficiency. The nanoparticles of PEG-AT-PEG show good biocompatibility to Hela cells at low concentration, when exposed to laser light, the destruction of Hela tumor cells was very distinct in the concentration range of 200 to 800 ug ml−1. Synthetic strategy based on CPs will be possible to develop more effective nanomaterials for treating cancer or tumors.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Cholnam Ri,Fengxiang Li,Hyokchol Mun,Linan Liu,Jingchun Tang
The technology of integrating sulfidated zero-valent iron and functional anaerobic bacteria has been extensively explored to improve the removal efficiency of pollutants and enhance the performance of anaerobic microbial system. In this study, the simultaneous DCNB(2,4-dichloronitrobenzene) reduction and methane production by ball-milled 1:1 Fe 0 /FeS 2 (briefly, 1:1 Fe 0 /FeS 2 ), Shewanella oneidensis MR-1 and microbial consortium (MC) were firstly investigated. The result showed that the DCNB reduction was increased by 2.6 and 1.7 times in 1:1 Fe 0 /FeS 2 + MR-1 group compared to 1:1 Fe 0 /FeS 2 and MR-1, respectively, while it further increased by almost 2 times in 1:1 Fe 0 /FeS 2 + MC + MR-1 group as compared to that of 1:1 Fe 0 /FeS 2 + MR-1 group. Moreover, the methane production was drastically facilitated via the reciprocal interaction among FeS as the reaction product, MR-1 and MC. Dechlorination was not found, mainly due to the inability of 1:1 Fe 0 /FeS 2 and the inexistence of dechlorinating bacteria in original inoculum. Meanwhile, the microbial community was also changed, with genera like Eubacterium capable of reducing nitroaromatic compound and Methanosarcina as acetoclastic methanogen enriched by 1:1 Fe 0 /FeS 2 and MR-1. Therefore, fast DCNB reduction and methane production using 1:1 Fe 0 /FeS 2 in anaerobic microbial system, gives useful reference for both establishment of pollutant removal and biogas production. In conclusion, Fe 0 /FeS 2 , as a kind of sulfidated ZVI, is a good candidate for enhancing both pollutant degradation and CH 4 production in anaerobic wastewater treatment.
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Journal of CO2 Utilization
·
2022
·
IF 8.321
Fei Chen,Wensheng Wei,Yunsheng Gao,Yuxin Wang,Zizhen Yan,Zhanguo Zhang,Haiming Yu,Guangwen Xu,Lei Shi
Ionic liquid 1-ethyl-3-methylimidazolium ([Emim]IM) with high thermal stability and strong basicity was successfully synthesized. Using [Emim]IM as catalyst, dimethyl carbonate (DMC) was directly synthesized from epoxy propane (PO), CO 2 , and methanol under mild reaction conditions. A continuous two-stage DMC synthesis process was developed. The cycloaddition of CO 2 and PO was first conducted to produce propylene carbonate (PC), and then methanol was introduced into the system to synthesize DMC. During the cycloaddition process, 97.40% PO conversion and 97.40% PC yield were achieved with TON of 99.49. In the subsequent transesterification stage, DMC yield attained 83.63% with selectivity higher than 99% and TON of 70.15. [Emim]IM was reused for seven times without obvious deactivation, exhibiting good stability. The effects of reaction temperature, reaction time, the initial pressure of CO 2 , and catalyst weight on cycloaddition and transesterification reactions were systematically investigated. The kinetic study showed that the activation energies (E a ) of cycloaddition and transesterification reactions were 28.02 and 38.53 KJ·mol −1 , respectively, much lower than those of catalysts reported in the literatures. In addition, [Emim]IM displayed superior catalytic activity for the cycloaddition of CO 2 with various epoxy compounds .
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