SOLID STATE IONICS
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2024
·
IF 3
Ke Huang,Mingyang Duan,Xiaojuan Lu,Feng Zhang
As a new type of clean and efficient energy storage device, lithium-ion batteries have been widely used in electronic products, electric vehicles, and other fields, and the accompanying safety issues are of increasing concern. Therefore, solid-state lithium-ion conductors have become a current research hotspot. This paper used graphene oxide material to design and prepare Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 solid electrolytes by the co-precipitation method and performed some relevant characterizations. The results showed that the addition of graphene oxide optimized the electrolyte structure improved the density of the powder, promoted grain growth, improved the transport path of lithium ions, and thus increased the total ionic conductivity . The optimal doping ratio was 0.5 wt%, and the total ionic conductivity reached the maximum of 2.42 × 10 −4 S/cm. Compared to pure Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , the ionic conductivity increased by 154% after using the graphene oxide . It is believed that larger grains, fewer grain boundaries, and denser microstructure resulted in a less distorted migration pathway for lithium ions. Under the influence of graphene oxide , Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 exhibited better air stability than pure Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 electrolyte. The electrolyte prepared in this study showed great application potential in all-solid-state batteries.
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MATERIALS CHEMISTRY AND PHYSICS
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2024
·
IF 4.3
Yang Qu,Hongrui Jin,Li Lu,Yumei Wang,Kotobuki Mashashi,Binggong Yan
In all-solid-state batteries , the rigid point contact between the solid electrolyte and electrode results in poor cell interface wettability and generates large interfacial impedance, which hinders the application of solid-state batteries. To enhance ionic conductivity and interfacial wettability of NASICON-structured solid-state electrolyte Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP), microporous LAGP with a hexagonal surface pattern is prepared using femtosecond laser followed by filling an ionic liquid electrolyte to form a solid-liquid composite electrolyte (HPL&IL). The effect of surface textures on the electrolyte-electrode interface is investigated. Experimental results demonstrate that cycling stability for Li|HPL&IL|Li cells can reach up to 350 h at a constant current density of 0.05 mA cm −2 at room temperature, and hexagonal surface textures promote uniform interfacial film formation while increasing contact area between electrode and electrolyte, providing more space for charge transfer at the interface.
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EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2017
·Vol. 119
·期 12
·1700300
·
IF 2.145
Long Xu,Li Zhang,Daoming Li,Pengzhan Liu,Chin-Ping Tan,Weifei Wang,Xiangqian Liu,Bo Yang,Dongming Lan,Yonghua Wang
Efficient synthesis of n-3 PUFA-enriched triacylglycerol (TAG) by the esterification of glycerol with n-3 PUFA in deep eutectic solvents (DES) is reported. There was a 1.2-fold increase of TAG yield in DES compared with that in the solvent-free system. Adsorption of the produced water by DES during esterification contributed to enhance the conversion efficiency by changing the reaction equilibrium. DES also served as an effective solvent for enriching the n-3 PUFA of TAG in the upper layer of reaction media. A TAG yield of 55% was achieved under the optimal condition. Practical Applications : Enzymatic synthesis of n - 3 PUFA-enriched triacylglycerol (TAG) is challenged by low yields. Here, deep eutectic solvents show great potential for enhancing the production of n-3 PUFA-enriched TAG. The production of n-3 PUFA-enriched triacylglycerol is greatly enhanced in deep eutectic solvents.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Fangfang Shang,Hengdao Quan,Xiaoxun Ma
In this study, 3-trifluoromethylpyrazole (TMPZ) was developed as a multifunctional electrolyte additive to enhance wettability between separator and electrolyte, CEI formation and remove HF to improve the performance of Li/NCM622 batteries by experiment and theoretical calculation. After 200 cycles at 30 °C, the discharge capacity retention of batteries at 1 C with 0.5 wt% TMPZ additive is remarkably enhanced from 68.3 % to 83.2 %. The enhanced electrochemical performance of the batteries by adding TMPZ additive is evaluated by the spectroscopic characterization and theoretical calculation. It is demonstrated that TMPZ can generate uniform and dense CEI film via ring-opening electrochemical polymerization of TMPZ on the NCM622 electrode surface. The CEI film helps to suppress the breakdown of LiPF 6 electrolyte and the leaching of transition metals, effectively avoiding harmful side reactions between the NCM622 electrode and the electrolyte. Furthermore, introducing TMPZ can enhance the wettability between separator and electrolyte, therefore providing more channels of Li + to accelerate reaction kinetics of batteries.
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Frontiers in Pharmacology
·
2024
·
IF 4.4
Jiemei Shi,Min Liu,Jiajie Zhao,Ye Tan,Chunhui Jiang
Introduction: Mitochondrial dysfunction and oxidative stress play important roles in diabetic retinal vascular injuries. Honokiol (HKL) is a small-molecule polyphenol that exhibits antioxidant effects and has a beneficial effect in diabetes. This study aimed to explore the potential ability of HKL to ameliorate vascular injury in diabetic retinopathy (DR) and its possible mechanisms of action.Methods: The effect of HKL was evaluated in vascular injury in an in vivo type 2 diabetic (db/db) mouse model. In vitro, retinal microvascular endothelial cells were treated with high glucose (HG) to simulate the pathological diabetic environment. Cell viability, expression of apoptosis-related proteins, cellular reactive oxygen species, mitochondrial membrane potential, and morphological changes in the mitochondria were examined.Results: The diabetic mice exhibited severe retinal vascular damage, including vascular leakage in vivo and capillary endothelial cell apoptosis in vitro. HKL reversed the retinal vascular leakage in the diabetic mice. In vitro, HKL improved retinal capillary endothelial cell viability, decreased apoptosis, and reversed the HG-induced increased cellular oxidative stress and mitochondrial fragmentation. The sirtuin 3 (SIRT3) inhibitor 3-TYP blocked all the in vivo and in vitro protective effects of HKL against diabetic retinal vascular leakage and capillary endothelium and eliminated the decrease in oxidative stress levels and reduction of mitochondrial fragmentation.Discussion: In conclusion, these findings suggest that HKL inhibits vascular injury in DR, which was likely achieved through SIRT3-mediated mitochondrial fusion. This study provides a potential new strategy for the treatment of DR.
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PubMed
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 50
·505502
·
IF 2.9
Zhihua Zhao,Hepeng Zhang,Pu Chen,Guixin Jin,Lan Wu
Two-dimensional material (2D material) MXene has great application potential in gas sensors because of its excellent controllable performance and vast specific surface area. In this study, we used a straightforward in-situ electrostatic self-assembly technique to create Fe(OH)3/Ti3C2Tx nanocomposites, which were then used to fabricate gas sensors for ammonia detection at room temperature (25 °C). Several characterization methods were performed aimed at determining the surface appearance and construction of the nanocomposites, and the sensing characteristics and mechanism were also systematically examined. The findings demonstrate the effective incorporation of amorphous Fe(OH)3 nanoparticles on the surface of Ti3C2Tx. Additionally the nanocomposites of Fe(OH)3/Ti3C2Tx have considerably higher specific surface area than pure Ti3C2Tx, hence offering more active NH3 adsorption sites. The response of the sensor to 100 ppm NH3 was 48.6% at room temperature, which was 9.3 times more higher than that of pure Ti3C2Tx. The sensors also have the advantages of long-term stability (33 d), low NH3 detection limit (500 ppb), and rapid recovery time (85 s) and response times (78 s). It is anticipated that this work will be helpful for developing the new generation of wearable ammonia sensors at room temperature.
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JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Dilare Halmurat,Xinyu Zhang,Litipu Aihaiti,Rong-Jun Xie
Eu 2+ -doped phosphors show broadband absorption, tunable emission and high quantum efficiency due to the parity-allowed 5d→4f transitions, allowing them to be used in solid-state lighting. To expand their applications in other fields such as detection and sensing technologies, the Eu 2+ emission needs to be tuned into the near-infrared region, but it is a big challenge to obtain Eu 2+ near-infrared region emitters due to the absence of host compounds with extremely large crystal-field splitting. In this work, we chose M 4 Li(BN 2 ) 3 (M = Ca, Sr, Ba) as a host and realize the near-infrared region emission of Eu 2+ in it. Among these phosphors, Ba 4 Li(BN 2 ) 3 :Eu 2+ exhibits the longest emission of 880 nm and the largest full-width at half maximum of 276 nm under 450 nm excitation, while Ca 4 Li(BN 2 ) 3 :Eu 2+ and Sr 4 Li(BN 2 ) 3 :Eu 2+ emit at 740 and 680 nm, respectively. We observe an interesting phenomenon that the energy shift of emission is linearly related to the radius difference between the alkaline earth cation and the activator Eu 2+ in this system.
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SYNTHETIC METALS
·
2024
·
IF 4
Hailan Zeng,Ruomei Wu,Yanan Li,Haiyun Jiang,Xiang Wang,Weili Zhang,Ziyu Li,Jun Zhang,Zhengrong Yan
In this work, the copolymers were successfully synthesized by electrochemical polymerization of two monomers, bithiophene (BT) and 3,4-ethylenedioxythiophene (EDOT), in a lithium perchlorate/propylene carbonate (LiClO 4 /PC) solution. The as-prepared were characterized with the aid of cyclic voltammetry, colorimetric analysis, Fourier transform infrared spectroscopy, and Ultraviolet-visible spectroscopy. The electrochromic and colorimetric properties of copolymers poly(2,2′-bithiophene-co-3,4-ethylenedioxythiophene) (P(BT-co-EDOT)) and homopolymer poly(2,2′-bithiophene) (PBT) in 0.1 M LiClO 4 /PC solution were investigated, and the coloring process based on the redox reaction of the film was observed. When an anodic potential is applied, the copolymer P(BT-co-EDOT) films show a color change from blue-purple to blue-gray changes, and the homopolymer PBT shows a color change from orange to brown. In addition, spectroelectrochemistry studies indicate that copolymer P(BT-co-EDOT) has a lower optical band gap (1.73–1.87 eV) than homopolymer PBT. The copolymers P(BT-co-EDOT) show a high optical contrast (36.65–42.62%) and coloration efficiency (215.8–296.6 cm 2 C −1 ). The copolymer P(BT1-co-EDOT1) demonstrates excellent redox cycling stability, with 90% of the original optical contrast maintained after 500 cycles, making it an ideal candidate for copolymers.
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JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
·
2018
·Vol. 27
·期 2
·164-170
·
IF 2.475
Xiaofeng Gong,Rui Zhao,Xiaomei Yu
Single-silicon nanowire field-effect transistor (SiNW-FET) devices are powerful tools for the detection and quantification of biochemical molecules. However, traditional SiNW-FET-based biosensors demonstrate low output signals and high fluctuation noises, which results from the tiny scale of a single channel and electrical property deterioration caused by the dry etching process. To improve the performance of the SiNW-FET biosensors, here we developed a 3-D-SiNW-FET by using a hybrid process of deep reactive ion etching and isotropic wet etching with HF, HNO3 and HAc (HNA) mixed solution. The 3-D-SiNW-FET that included 5 × 7 nanowire channels with a wire diameter of approximately 300 nm was successfully fabricated with the novel hybrid process. Compared with the performance of single-and 2-D-SiNW-FETs, the 3-D-SiNW-FET showed a fairly good ability to stabilize and enhance the source-drain current by parallelizing the signals of the multiple channels. With the fabricated 3-D-SiNW-FET, immunoglobulin G was detected at a concentration as low as 5 fM.
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Crystals
·
2024
·Vol. 14
·期 5
·431
·
IF 2.4
Zhenggang Zou,Jiaolin Weng,Chun Liu,Yiyang Lin,Jiawei Zhu,Yijian Sun,Jianhui Huang,Guoliang Gong,Herui Wen
Inorganic scintillation crystals have been widely used in applications of high-energy physics, nuclear medical imaging, industrial nondestructive inspection, etc. In this work, a single crystal Ba3Y(PO4)3(BYP) with 1.0 at% Ce3+-doping concentration was first grown by the Czochralski method, and the electronic structure was calculated using first principles based on density functional theory. In addition, a series of Ce3+-doped BYP phosphors were synthesized, and the fluorescence emission under UV excitation was measured through low-temperature spectroscopy, containing double-peaked emission from 5d–4f transition and self-trapped exciton recombination. A comparison of the UV and X-ray-excited fluorescence spectra reveals the existence of oxygen vacancies as well as F+ centers in the crystal. The air annealing of the crystal effectively reduces the thermoluminescence defects but reduces the emission intensity under UV or X-ray excitation. The BYP:Ce crystal shows a fast decay lifetime of 15.5 ns, and the fast component is as short as 8 ns. The results show that the Ce3+-doped BYP crystal has potential as a kind of scintillator with fast decay properties.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2011
·
IF 2.089
Xue Wang,Jianming Pan,Wei Guan,Jiangdong Dai,Xiaohua Zou,Yongsheng Yan,Chunxiang Li,Wei Hu
A simple method for selective recognition of 3-chlorophenol (3-CP) from aqueous solution has been developed using a surface molecularly imprinted polymer (MIP) as sorbent. Characterization of the obtained MIP was achieved by Fourier transform infrared spectroscopy (FTIR). Kinetic, thermodynamic, dynamic adsorption, and selectivity experiments were investigated in this study. Kinetic experimental data were well-described by the pseudosecond-order kinetic model. The obtained Arrhenius activation energy Ea from the kinetic data indicated a physisorption mechanism, and the negative values of ΔHo demonstrated that the adsorption of 3-CP onto MIP was exothermic. Equilibrium experimental data of MIP fitted the Langmuir isotherm well. The MIP showed outstanding affinity toward 3-CP in aqueous solution, and the optimum pH value for binding has been found around the neutral range. When methanol was used as eluent, the adsorbed 3-CP eluted easily from MIP. The total dynamic capacity of the imprinted sorbent was calculated to be 1137.58 mg·g–1. The breakthrough of 3-CP started after 60 mL, and the breakthrough capacity was 756.8 mg·g–1. Meanwhile, selectivity experiments demonstrated that MIP showed high affinity to target molecules over competitive CPs (2,6-dichlorophenol and 2,4,6-trichlorophenol).
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 124
·期 1
·109-115
·
IF 1.24
Jikui Wang,Guofeng Cai,Xudong Zhu,Xiaping Zhou
The oxidative chemical polymerization of 3, 4-ethylenedioxythiophene (EDOT) was conducted at room temperature in the presence of poly(styrene sulfonate) (PSS) as the doping agent, sodium supersulphate (Na 2 S 2 O 8 ) and ferric sulphate(Fe 2 (SO 4 ) 3 ) as the compound oxidant and deionized water as the solvent. In order to remove sodium ion (Na + ), ferric ion (Fe 3+ ), and sulfate ion (SO4 2− ), certain amount of ion exchanger was added after 24 h, the dark blue poly(3, 4-ethylenedioxythiophene) (PEDT)/PSS solution was obtained. The influence of different proportions of EDOT and PSS, different proportions of EDOT and the compound oxidant, different stirring rates on the morphology, and surface resistivity were discussed. The influence of pH value of the PEDT/PSS solution, the coating thickness, and soak time on the surface resistivity was investigated. Recipe and experimental conditions were optimized and the PEDT/PSS solution was obtained with excellent performance which has relatively low in surface resistance, good water tolerance, and light transmittance. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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