ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Wei Wei,Tao Ye,Zunqiu Xiao,Kejia Xiang,Huaying Wang,Zhongtai Zhang,Shitong Wang,Zilong Tang
The development of cathode materials has always been one of the most crucial areas of research in the field of sodium-ion batteries. Sulfate-based polyanionic materials, known for their high working voltage characteristics, have received widespread attention. In this work, a fluoro-sulfate sodium-ion battery cathode material, Na3Fe2(SO4)3F modified with carbon nanotubes, was developed using a low-temperature solid-state annealing method. This Na3Fe2(SO4)3F cathode exhibits an exceptionally high voltage of 3.77 V, excellent discharge capacity (102 mAh/g at 0.1C), and good rate capability. This material broadens the research directions for cathode materials and holds promise as a foundation for the further development of high-performance sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2020
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IF 14.588
Zixing Wang,Zhong Xu,Haichao Huang,Xiang Chu,Yanting Xie,Da Xiong,Cheng Yan,Haibo Zhao,Haitao Zhang,Weiqing Yang
Rich chemistry and surface functionalization provide MXenes enhanced electrochemical activity yet severely exacerbate their self-discharge behavior in supercapacitors. However, this self-discharge behavior and its related mechanism are still remaining issues. Herein, we propose a chemically interface-tailored regulation strategy to successfully unravel and efficiently alleviate the self-discharge behavior of Ti3C2Tx MXene-based supercapacitors. As a result, Ti3C2Tx MXenes with fewer F elements (∼0.65 atom %) show a positive self-discharge rate decline of ∼20% in comparison with MXenes with higher F elements (∼8.09 atom %). Such decline of the F elements can highly increase tight-bonding ions corresponding to an individual self-discharge process, naturally resulting in a dramatic 50% increase of the transition potential (VT). Therefore, the mixed self-discharge rate from both tight-bonding (contain fewer F elements) and loose-bonding ions (contain more F elements) is accordingly lowered. Through chemically interface-tailored engineering, the significantly changed average oxidation state and local coordination information on MXene affected the interaction of ion counterparts, which was evidently revealed by X-ray absorption fine structures. Theoretically, this greatly improved self-discharge performance was proven to be from higher adsorption energy between the interface of the electrode and the electrolyte by density functional theory. Therefore, this chemically interface-tailored regulation strategy can guide the design of high-performance MXene-based supercapacitors with low self-discharge behavior and will promote its wider commercial applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhibin Wang,Yuxiu Sun,Zixian Qin,Qianqian Yu,Zhengqing Zhang,Zhihua Qiao
Metal-organic framework (MOF) is widely used in MOF-based mixed matrix membrane (MMMs) for gas separation, however, their separation in low concentration CO 2 and humid environment is a challenging problem to overcome. Herein, a MOF-based MMM with multiple fluorine sites was constructed for efficient separation of CO 2 /N 2 separation system with low concentration CO 2 under humid conditions. Introducing fluorine element sites into membrane materials can not only enhance the affinity between the membrane material and CO 2 molecules, but also make the membrane material hydrophobic, making it suitable for low concentration CO 2 separation under humid conditions. The optimized membrane composed of 10 wt% PIM-2/PIM-1 as blend polymer matrices and 25 wt% fluorinated UiO-66 as fillers exhibited CO 2 permeability of 9234 Barrer and CO 2 /N 2 selectivity of 32.97 under humid conditions of relative humidity of 65% and low CO 2 /N 2 volume ratio of 1:99. This work may provide a feasible way for the design of high-performance gas separation membranes in practical applications.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHIC SCIENCE
·
2025
·Vol. 63
·期 7
·
IF 1.3
Cao Lihua,Ding Youchao,Qian Kai,Wang Xiangxiang,Wang Xiaoqiong,Zhou Jia,Tang Juan
A screening method was developed for the determination of per- and polyfluoroalkyl substances in textiles by combustion and ion chromatography. In this work, a new type of high-temperature combustion absorption device was designed, and the samples were burned, cracked and gasified by temperature programmed heating mode. The produced free fluorine and hydrogen fluoride gases were absorbed by water vapor and completely transformed into inorganic fluoride anion. After condensation and collection, it was separated and determined by ion chromatography. The pre-treatment conditions were optimized including the sample weight, the combustion method, the combustion gas and its flow rate, the water evaporation rate and the condensate collection method. Method validation was performed in negative samples of cotton, wool and polyester, at spiked levels of 5, 50 and 200 mg/kg, respectively. The average recoveries were between 85.7 and 95.0% with relative standard deviations <20% (n = 7) indicating satisfactory accuracy and repeatability. The calibration curve was performed with the correlation coefficients (R2) higher than 0.999 within a linearity range of 0.01–2.0 mg/L. The limit of quantification was 5.0 mg/kg. The developed method was successfully used to determine the total fluorine in market samples. It can meet the screening determination of PFAS in various textiles.
研究领域:
分析化学
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环境科学
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材料科学
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纺织工程
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化学分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）