JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Li Xiang,Pan Zhihu,Ji Xiaohong
MXenes are promising two-dimensional materials for energy storage applications, but the stacking and aggregation of MXene nanosheets degrade their electrochemical performance. In this work, three-dimensional (3D) porous Ti 3 C 2 T x was successfully prepared on carbon cloth with controllable mass loading, porosity, and pore size with an electrophoretic co-deposition (EPCD) strategy by introducing polystyrene (PS) microspheres as soft sacrificial templates. The resulting 3D porous structure exhibits a significant enhancement in electrochemical performance due to effectively suppressing the stacking and aggregation of Ti 3 C 2 T x nanosheets, which provides additional electron transport channels and electrochemically active sites. The modified 3D porous Ti 3 C 2 T x @CC shows a specific capacitance as high as 299 F g −1 (about 1.6 times that of pristine Ti 3 C 2 T x ) at a current density of 1 A g −1 , a satisfactory capacitance of 234 F g −1 (approximately 78.3% of the initial capacitance) under a high current density of 10 A g −1 , and excellent cycling stability. Furthermore, a porous Ti 3 C 2 T x @CC-based symmetric supercapacitor displays an energy density of 6.6 µWh cm −2 (3.9 Wh kg −1 ) at a power density of 0.2 mW cm −2 (125 W kg −1 ). This work facilitates an effective EPCD strategy for producing 3D porous Ti 3 C 2 T x for energy storage, electrocatalysis, and environmental applications.
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高影响因子
Nuclear Science and Techniques
·
2022
·Vol. 33
·期 8
·1-11
·
IF 2.389
Lü Zhi-Wei,Wei Gong-Xiang,Wang Han-Qiu,Guan Yu,Jiang Ning,Liu Yun-Yan,Li Zhao,Qin Hua,Liu Hui-Qiang
The evolution of lead halide perovskites used for X-ray imaging scintillators has been facilitated by the development of solution-processable semiconductors characterized by large-area, flexible, fast photoresponse. The stability and durability of these new perovskites are insufficient to achieve extended computed tomography scanning times with hard X-rays. In this study, we fabricated a self-assembled CsPbBr 3 -based scintillator film with a flexible large-area uniform thickness using a new room-temperature solution-processable method. The sensitivity and responsivity of X-ray photon conversion were quantitatively measured and showed a good linear response relationship suitable for X-ray imaging. We also demonstrated, for the first time, that the self-assembled CsPbBr 3 -based scintillator has good stability for hard X-ray microtomography. Therefore, such an inexpensive solution-processed semiconductor easily prepared at room temperature can be used as a hard X-ray scintillator and equipped with flexible CsPbBr 3 -based X-ray detectors. It has great potential in three-dimensional high-resolution phase-contrast X-ray-imaging applications in biomedicine and material science because of its heavy Pb and Br atoms.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 9
·5074-5086
·
IF 2.047
Wu Linlin,Zhou Jiacheng,Bu Ximan,Ge Yongxin,Gao Yifeng,Ma Xiaofeng
Due to the advantages of high ion density, low volatility, non-toxicity, and low cost, deep eutectic solvent gels have attracted widespread interest as novel solid-state ionic conductors for flexible devices. However, most of the currently developed deep eutectic solvent gels have weak mechanical properties, which seriously hinder their large-scale application. Herein, tough and ultrastretchable agar-based double-network deep eutectic solvent gels were successfully fabricated through the self-assembly of agar at a concentration range of 2% to 6% in a choline chloride/urea/water eutectic mixture (ChCl:urea:H 2 O = 1:2:1) by heating–cooling to form the first physical dissipative network and combination with the second Al 3+ -cross-linked hybrid poly(acrylic acid) (PAA) network. Such a double-network and multi-bond design endow the obtained 22 wt.% polymer scaffold-supported deep eutectic solvent gels with good mechanical properties (high tensile strength of 216 kPa and toughness of 2112 kJ m −3 ), stretchability (breaking strain of 1566%), good self-recovery ability (91% recovery efficiency after 600% strain deformation), and high room-temperature ionic conductivity of 2.1 mS cm −1 . Furthermore, agar-based double network deep eutectic solvent gels were successfully used as stretchable gel electrolytes for the fabrication of electric double-layer capacitors and reliable flexible sensors with excellent electrochemical performance over a wide strain range. Graphical Abstract A nonvolatile agar-based double-network gel containing a deep eutectic solvent with high toughness of 2112 kJ m −3 , high stretchability of 1595%, excellent recovery property, and ionic conductivity of 2.1 mS cm −1 is fabricated for flexible electronics by the self-assembly of agar in a choline chloride/urea/water eutectic mixture (ChCl:urea:H 2 O = 1:2:1) to form the first physical dissipative network and combination with a second Al 3+ -cross-linked hybrid PAA network.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 7
·3009-3017
·
IF 3.5
Fu Yuan,Gong Zhemin,Li Dapeng,Liu Yongxing,Zhou Xiaolong,Yang Yong,Jiao Qing
Solid electrolytes equipped battery show promise in solving energy storage and ecological concerns owing to their excellent electrical conductivity and chemical stability. Only a limited number of substances satisfy the demanding criterion of high ionic conductivity (≥ 10 −3 S/cm), while using non-toxic elements. In this work, the designed Na 3.3 Zn 0.1 Sb 0.9 S 4 electrolyte, a zinc-doped sodium sulfide ion conductor, with a maximum conductivity of 1.48 × 10 −3 S/cm under normal conditions, and a low activation energy of 0.128 eV was achieved. This was ruled by substituting low-valence Zinc for antimony in the SbS 4 3− cell, maintaining efficient ion transport pathways. Additionally, the electrolyte demonstrated strong air stability under humid conditions and emitted minimal H 2 S. The origin of heterovalent ion doping and the impact of thermal effects on electrochemical performance were discussed in detail, which were crucial to promote the development of sodium-ion solid electrolytes.
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高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2021
·Vol. 38
·期 5
·1032-1042
·
IF 3.309
Xu Li,Qin Yu,Liu Liying,Xiao Juntian,Ding Zhongwei
The membrane contactor has been considered an effective device to capture CO 2 , but its performance is limited by membrane wetting phenomena. In this work, the ZIF-8/ZIF-L (zeolitic imidazolate framework) based composite membrane with excellent hydrophobic stability and CO 2 permeability was successfully fabricated by coating the dense layer on the porous PVDF (polyvinylidene fluoride) substrate. The dense layer was developed by evenly incorporating ZIF-8 nanocrystals and ZIF-L nanosheets into the polydimethylsiloxane (PDMS) polymer. The as-prepared membrane possessed competitive hydrophobicity with a water contact angle (WCA) of 131.8°. And after a ten-day immersion test in CO 2 absorbent, the WCA only declined by 9.8%, exhibiting excellent hydrophobic stability. Besides, the CO 2 permeability of the composite membrane was 61.8×10 −8 ·mol·m −2 ·s −1 ·Pa −1 with an ideal CO 2 /N 2 separation factor of ∺20, which was effectively improved in comparison with the control membrane. In the CO 2 absorption experiment, the prepared membrane achieved the competitive CO 2 flux of 3.02×10 −3 ·mol·m −2 ·s −1 when the liquid velocity was 0.25 m·s −1 and displayed robust long-term operating stability. Finally, the AC impedance technique was applied to continuously monitor the wetting state of composite membranes, which further investigated their anti-wetting ability.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 24
·10388-10398
·
IF 3.553
Zhong Mingjun,Zhang Shizhen,Dong Anwang,Sui Zhuyin,Feng Lijuan,Chen Qi
Heterogeneous metal–organic framework composites are widely used to catalyze the synthesis reaction of organic materials. Here, we report the use of a heterogeneous catalyst to catalyze the reaction of alcohols and amines to synthesize imines directly using a one-pot method. A low-dimensional Cu-MOF prepared by a simple surfactant-assisted method shows the morphology of nanorods. Cu-MOF nanorods provide an ideal support for preparing supported metal nanocatalysts. A reduction method was applied to immobilize the ultrafine noble metal Au and Pd nanoparticles on the surface of Cu-MOF nanorods to form a Cu-MOF/Au–Pd composite catalyst. Cu-MOF/Au–Pd catalyst is used to catalyze the reaction between alcohols and amines to form imines. Due to the synergy between different metal nanoparticles, it can effectively catalyze the reaction to form imines. In addition, Cu 2+ in Cu-MOF/Au–Pd catalyst facilitates the adsorption of substances by excess electrons and promotes product formation. After 12 h of catalytic reaction, the yield of imine is as high as 95%.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 9
·5049-5056
·
IF 1.938
Wang Yihe,Qin Faxiang
Lithium (Li) metal has been considered as a potential substitute for the graphite anode in Li-ion batteries to further boost their energy density. Polymer electrolytes (PEs) are expected to be applied in Li metal batteries (LMB) to replace liquid electrolytes due to safety concerns. Among others, poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP)-based electrolytes offer clear advantages such as improved processability and chemical/electrochemical stability. However, Li dendrite growth in LMBs and the low Li-ion conductivity of solid polymer electrolytes (SPEs) still hinder their practical applications. To address this issue, it has been proposed that solvent-enhanced PVDF-HFP-based polymer electrolytes (SPPEs) with a tuned amount of residual N -methyl-2-pyrrolidone (NMP) could provide improved ionic conductivity and outstanding chemical/electrochemical stability. We report herein the effects of different salts, polymer, and additives on the electrochemical performance and interface stability of SPPEs. We demonstrate that lithium salts and blended polymers play a pivotal role in the electrochemical performance of SPPEs. In addition, additives exert a remarkable effect on the stripping/plating behaviors of metallic lithium anode in SPPEs. SPPEs with adequate LiNO 3 are found to be stable with lower overpotentials at 0.5 mA cm −2 on cycling of symmetrical Li cells. These results highlight novel SPPE strategies for optimizing the ionic conductivity and stabilizing the lithium metal anodes.
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高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 7
·1-11
·
IF 5.479
Xing Xinxin,Yang Yue,Zou Tong,Wang Zhezhe,Wang Zidong,Zhao Rongjun,Zhang Xu,Wang Yude
Thioglycolic acid-functionalized ZnSe quantum dots (QDs) as a colorimetric nanoprobe were prepared and applied to the determination of cobalt(II) and iron(III). Test strips were obtained by a dipping-drying process. On exposure to Co(II), they undergo a color change from white to brown, and on exposure to Fe(III) from white to pink. The limits of detection (LOD) are 2.6 mg L −1 for Co(II) and 2.2 mg L −1 for Fe(III). Test strips introduce a low-cost, portable, rapid and convenient tool for determination of Co(II) and Fe(III). In addition, two other analytical methods have been studied for detection of Co(II) and Fe(III) at low concentration. The first is UV-vis spectrometry which has a LOD as low as 0.14 mg L −1 for Co(II) (at 412 nm) and 0.12 mg L −1 for Fe(III) (at 400 nm). The second is dynamic light scattering (DLS) with a LOD of 3.0 μg L −1 for Co(II) and 2.5 μg L −1 for Fe(III).
Thioglycolic acid-functionalized ZnSe quantum dots (TGA-ZnSe QDs) show high sensitivity and low detection limits for Co 2+ and Fe 3+ .
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 23
·21693-21701
·
IF 2.22
Zhou Fuming,Wang Hao,Guo Jianming,Yang Hui,Li LingFeng,Zhang Qilong
Microwave dielectric ceramics Sr 2 CeO 4 + n wt% Li 2 CO 3 —Bi 2 O 3 (LB) (1 ≤ n ≤ 4, L: B = x : y , weight ratio) were prepared by a traditional solid-state reaction method. The effects of LB additives on the phase formation, microstructure, sintering behavior, and microwave dielectric properties of Sr 2 CeO 4 ceramics were investigated. The sintering temperature can be reduced obviously from 1270 to 950 °C because of the liquid phase formation of LB. Single-phase Sr 2 CeO 4 ceramics with dense structure and homogenous grains were obtained by adding 1wt% LB. With LB content increasing, Q × f values would decrease because secondary-phase SrCeO 3 appeared in the ceramics. When the content of LB was fixed at 1 wt%, the sintering temperature and Q × f value would decrease simultaneously with the ratio of Li 2 CO 3 increasing. Desirable performances of Sr 2 CeO 4 + 1wt% LB ceramics: ( ε r = 14.36, Q × f = 102,023 GHz and τ f = − 66.42 ppm/°C, L:B = 2:8) and ( ε r = 13.56, Q × f = 70,109 GHz, τ f = − 64.17 ppm/°C, L:B = 8:2) can be achieved at 1075 °C and 950 °C, respectively, suggesting that Sr 2 CeO 4 –LB ceramics have a great potential for millimeter-wave applications.
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高影响因子
RARE METALS
·
2022
·Vol. 41
·期 12
·4055-4064
·
IF 6.318
Li Hao-Xiang,Zhu Jia-Hui,Huang Xiao-Bing,Zhou Tao,Ren Yu-Rong
The extremely low electrical conductivity and ion-diffusion coefficient of Li 2 FeSiO 4 limits its application as a cathode material in lithium-ion batteries. Therefore, in situ boron-doped Li 2 FeSi 1− x B x O 4− δ /C ( x = 0, 0.01, 0.03, 0.05 and 0.07) at the Si site was prepared via the solid-state reaction method using pitch as the carbon source. B doping in the lattice structure and a carbon coating on the surface of the composites could effectively enhance the Li + /electron conductivity. Moreover, the reduced particle size of the active material with the relatively high specific area via boron-doped modification could improve the wettability between the electrolyte and cathode. With the synergistic effect of appropriate boron doping and carbon coating, it exhibits a good rate performance, specific capacity, and cycling performance. As a result, the as-prepared Li 2 FeSi 0.95 B 0.05 O 4− δ /C cathode showed a high discharge capacity of 160.7 mAh·g −1 at 0.2C, and the capacity retention rate was 96% after 100 cycles at 1.0C. This work presents an effective path for designing advanced cathode materials for lithium-ion batteries. Graphical abstract
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高影响因子
COLLOID AND POLYMER SCIENCE
·
2021
·Vol. 299
·期 9
·1489-1498
·
IF 1.931
Yu Caili,Yan Chengfei,Shao Jintao,Zhang Faai
Green renewable resource has become a global hot spot. In this study, naturally occurring resource rosin derivative (RAG) was used to prepared a cationic waterborne polyurethane (WPU) dispersion using n-methyl di-ethanolamine (MDEA) as an ion center and 1,3-bis(3-aminopropyl) tetramethydisiloxane (APTMDS) as a chain extender, and hexamethylene diisocyanate (HDI) as a hard segment. The effects of MDEA and APTMDS contents on the particle size and storage stability of the WPU dispersion was determined, in addition, thermo-mechanical and mechanical properties, and antibacterial property as well as water uptake of the resulting polyurethane films were thoroughly investigated. The results show that an increase in the APTMDS content considerably improved the mechanical properties, surface hydrophobicity and water resistance of the WPU films. Moreover, all WPU films exhibit enhanced antibacterial activity against Escherichia coli and Staphylococcus aureus with the increase in the MDEA and APTMDS contents. Graphical abstract
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高影响因子
Journal of Ovarian Research
·
2024
·Vol. 17
·期 1
·1-12
·
IF 3.8
Liu Wen-Jiao,Li Li-Shu,Lan Meng-Fan,Shang Jian-Zhou,Zhang Jin-Xin,Xiong Wen-Jie,Lai Xin-Le,Duan Xing
Zinc (Zn) is a crucial trace element essential for human growth and development, particularly for reproductive health. Previous research has shown a decrease in serum zinc concentration with age and individuals with conditions such as polycystic ovary syndrome (PCOS) and diabetes mellitus. However, the specific effects of zinc deficiency on the female reproductive system, especially ovarian function, are not fully understood. In our study, we observed a significant reduction in the total number of follicles and mature follicles in the zinc deficiency group. This reduction correlated with decreased level of anti-Mullerian hormone (AMH) and abnormal gene expression affecting hormone secretion regulation. Furthermore, we found that zinc deficiency disrupted mitochondrial dynamics, leading to oxidative stress in the ovaries, which further inhibited autophagy and increased ovarian apoptosis. These changes ultimately resulted in the failure of germinal vesicle breakdown (GVBD) and reduced oocyte quality. Meanwhile, administration of zinc glycine effectively alleviated the oocyte meiotic arrest caused by dietary zinc deficiency. In conclusion, our findings demonstrated that dietary zinc deficiency can affect hormone secretion and follicle maturation by impairing mitochondrial function and autophagy.
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高影响因子
危险品化学品经营许可证（带存储）