JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2011
·
IF 2.089
Xia Gui,ZhiGang Tang,Weiyang Fei
The constant-volume method is used to determine the solubility of CO2 in methanol, ethanol, n-propanol, n-butanol, n-propanol, ethylene glycol, propylene glycol, acetone, 2-butanone, ethylene glycol monomethyl ether, and ethylene glycol monoethyl ether under the pressure of 6 MPa and the temperature variations from (288.15 to 318.15) K in this paper. It is found by contrast that ketones have a greater ability to dissolve CO2 than alcohols, ethers, and glycols, which also indicate that both the carbonyl group and the ether bond in solvents can promote the CO2 absorption, but hydroxyl group will inhibit the CO2 absorption.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yawei Chen,Fanyang Huang,Miao Xie,Yehu Han,Wanxia Li,Yulin Jie,Xingbao Zhu,Tao Cheng,Ruiguo Cao,Shuhong Jiao
High-voltage Li metal batteries (LMBs) based on ether electrolytes hold potential for achieving high energy densities exceeding 500 Wh kg–1, but face challenges with electrolyte oxidative stability, particularly concerning aluminum (Al) current collector corrosion. However, the specific chemistry behind Al corrosion and its effect on electrolyte components remains unexplored. Here, our study delves into Al corrosion in the representative LiFSI-DME electrolyte system, revealing that low-concentration electrolytes exacerbate Al current collector corrosion and solvent decomposition. In contrast, high-concentration electrolytes mitigate these issues, enhancing long-term stability. Remarkably, LiFSI-0.7DME electrolyte demonstrates exceptional stability with up to 1000 cycles at high voltage without significant capacity decay. These findings offer crucial insights into Al corrosion mechanisms in ether-based electrolytes, advancing our comprehension of high-voltage LMBs and facilitating their development for practical 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
BIOLOGICAL & PHARMACEUTICAL BULLETIN
·
2017
·Vol. 40
·期 8
·1165-1173
·
IF 1.683
Shuhua Mu,Huixian Liu,Lifang Zhang,Xiaoyang Wang,Feiqun Xue,Yue Zhang
To develop new pleuromutilin derivatives as veterinary antibiotic medicines, we designed and synthesized a series of new thioether pleuromutilin derivatives possessing acylthiazolyl moiety based on previously designed derivatives. The antibacterial properties of the prepared pleuromutilin derivatives were assessed in vitro by the broth dilution method against five kinds of bacteria and the mycoplasma Mycoplasma gallisepticum (MG). All of the tested compounds displayed moderate to good antibacterial activity to methicillin-sensitive Staphylococcus aureus (MSSA), methicillin-sensitive Staphylococcus epidermidis (MSSE), methicillin-resistant S. aureus (MRSA), Streptococcus agalactiae (S. aga) and MG. However, the activity to Pyogeniccoccus (Pyogens) was generally poor. Compounds 13i and l showed potent antibacterial activity against MSSE and MRSA which are better than that of valnemulin. The structural modification for pleuromutilin affected the antibacterial activity. Amino substituents in the benzene ring can effectively improve activity. Compared with the analogue 13a that possesses unsubstitution benzoyl group, the nitro, methoxy, hydroxy and dichloro substituent contributed little to antibacterial activity. Increasing a methylene between benzene moiety and carbonyl group decreased the bioactivity of derivative. The analogues that obtained by the reaction of amino acids and intermediate 9 showed moderate activity.
研究领域:
药理学
·
微生物学
·
兽医学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 45
·2302443
·
IF 27.8
Kai Ding,Elijah J. Begin,Shouyi Yuan,Mingyang Zhong,Yang Wang,Yingjie Zhang,Xiaoyuan Zeng,Junwei Lucas Bao,Yonggang Wang
Given the high compatibility with Li metal anodes, ethereal electrolytes have found widespread use in Li metal batteries. Unfortunately, their applications in high-voltage Li metal batteries are hampered by a limited electrochemical window. In this study, a diluted ethereal electrolyte (with Li salt concentration < 1.5 m ) is developed containing 1 m lithium bis(fluorosulfonyl) imide (FSI) and 0.3 m LiNO 3 in a N -methyl- N -propylpiperidinium bis(trifluoromethanesulfonyl)imide (PP13TFSI):dimethyl ether (DME) (v:v = 1:4) mixture for Li metal batteries with an aggressive high-voltage cathode via the formation of an anion-enriched solvation sheath. In contrast to high-concentration electrolytes, the formation of the anion-enriched solvation sheath in this design is facilitated by the addition of ionic liquids. Further theoretical calculations indicate that the presence of FSI − and NO 3 − anions in the first solvation sheath weakens the desolvation energy of the DME solvent, suggesting a faster desolvation process at the electrode interphase. Consequently, the designed electrolyte enables long-term cycling of Li || LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) full cells over 1000 cycles at a high rate of 10 C. More notably, it also allows for a long cycle life of 100 cycles under a high rate of 5 C, even with limited negative capacity to positive capacity (N/P) ratio of 1.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Powder Materials
·
2025
·
IF 24.9
Renfei Zhao,Yuanhang Gao,Zuosu Qin,Yuelin Li,Tao Zhang,Anqiang Pan,Ning Zhang,Renzhi Ma,Xiaohe Liu,Gen Chen
The poor oxidation stability of ether-based solvents has long been a major challenge limiting their practical application. To enhance the oxidative stability of ether-based electrolytes, the physicochemical properties of various glycol dimethyl ethers are screened, and diglyme (G2) is selected as the sole solvent for the electrolyte. Lithium bis(fluorosulfonyl)imide (LiFSI), a highly dissociative salt, is used as the primary salt, while lithium nitrate (LiNO 3 ) and lithium difluorophosphate (LiDFP), which have small ionic sizes and strong binding energies, are added as secondary salts. The resulting electrolyte can modulate the electric double layer (EDL) structure by NO 3 − and DFP − on the cathode side, leading to an increased Li + concentration that is originally repelled by the cathode. Additionally, the oxidation stability of the electrolyte is improved and the formed electrode-electrolyte interphase (EEI) is more uniform and stable, thereby enhancing the electrochemical performance of the cells. As a result, cells assembled with a total of 1M ternary lithium salt electrolyte in G2 solvent can operate at high voltage of 4.4 V. The Li||NCM811 cells maintain 80.2% capacity retention after 270 cycles at room temperature, with an average Coulombic efficiency of 99.5%, and exhibit 88.4% capacity retention after 200 cycles at −30 °C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Cell Reports Physical Science
·
2022
·
IF 7.832
Huwei Wang,Jinkai Zhang,Haodong Zhang,Wei Li,Ming Chen,Qing Guo,Kah Chun Lau,Liang Zeng,Guang Feng,Dengyun Zhai,Feiyu Kang
Poor oxidation stability of ether solvents at the cathode restricts the use of dilute ether electrolytes with conventional concentrations around 1 M in high-voltage, lithium-metal batteries. Here, we report an anion-adsorption approach to altering the ether solvent environment within the electrical double layer (EDL) at the cathode by adding a small amount of nitrate so that the oxidation tolerance of nitrate-containing dilute ether electrolytes is enhanced up to 4.4 V (versus Li/Li + ), leading to complete compatibility with high-voltage cathodes and exhibiting superior cycling stability. Constant potential molecular dynamics simulations reveal that ether molecules are mostly excluded from the cathode because of nitrate occupation in the inner layer of the EDL, thus suppressing ether oxidative decomposition. This work highlights that regulating the interfacial structure by adding surface adsorbates, rather than passivating the cathode-electrolyte interphase or changing ion solvation, can help to enhance the oxidation stability of ether solvents.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2019
·
IF 4.191
Ting-ting Liu,Hai-bin Wu,Hai-bo Wu,Jing Zhang
The ethyl acetate, ethanol and water extracts of different organs (flowers, leaves, stems and roots) of wormwood ( Artemisia absinthium L.) were investigated to examine nematicidal and antifungal activities in an effort to promote future agricultural applications of the wormwood and its potential as an industrial crop. The results showed that highest concentration of total thiophene content (TTC), as well as nematicidal and antifungal activities were found in ethyl acetate extract of roots. TTC and biological activities were highly correlated, indicating that thiophenes played an important role in nematicidal and antifungal activities. Furthermore, four extraction techniques (Maceration, Soxhlet extraction, Supercritical fluid extraction and Ultrasound-assisted extraction) were compared by evaluating the yield of thiophenes. Supercritical fluid extraction (SFE) appeared to be the best method for extracting thiophenes with the highest TTC and superior activities. In addition, eight thiophenes ( 1 – 8 ) including two new compounds ( 1 and 2 ) were isolated from the SFE extract by the bioassay-guided method. All thiophenes showed potent nematicidal activities. In particular, 1 – 4 (50% lethal concentration (LC 50 ) values of 2.69, 4.17, 6.13 and 7.65 mg/L, respectively) were more effective than commercial nematicide abamectin (LC 50 , 9.47 mg/L). Also, these thiophenes showed antifungal activities against four soil-borne fungi at different degrees, especially for compounds 1 and 2 which exhibited noticeable antifungal effects (minimum inhibitory concentration (MIC) values ranging from 8–16 mg/L). Findings of this work suggest that wormwood root and its thiophenes could be used in nematicide and fungicide agent industry.
研究领域:
植物学
·
农业科学
·
药理学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Lei Hu,Haifeng Xue,Lingli Liu,Sheng Liang,Tao Ding,Ningning Zhou,Lili Wang,Chonghai Deng,Yongsheng Han
The “shuttle effect” in ether electrolyte or nucleophilic reaction in carbonate electrolyte are major obstacles to developing of lithium-sulfur (Li–S) batteries. Superficial sulfur on the outside of microporous carbon host can occur“shuttle effect” in ether electrolyte or nucleophilic reaction in carbonate electrolyte, which may affect the electrochemical reaction mechanism for lithium-sulfur batteries and need to be further clarified. Herein, we rationally designed microporous carbon and non-microporous carbon as the sulfur hosts, and manipulated the distribution of sulfur via interfacial control in cathode material, exhibiting diverse electrochemical behavior in carbonate electrolyte and ether electrolyte. The surface composition of the electrode was confirmed by ex-situ XPS and verified by in-situ XRD, which contributes to demonstrating the definite reaction mechanisms of lithium-sulfur batteries in the different electrolytes. The results show only the sulfur confined in microporous structure is active via “solid–solid” pathway, and the presence of sulfur on the outer surface of the cathode electrode has the negative effect on electrochemical performance in both electrolytes, which should be avoided in the fabrication of carbon/sulfur composites. Based on microporous carbon/sulfur composites, the lithiated Ge-S full cell was proposed and exhibited superior cycling performance and high Coulombic Efficiency.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Shunqiang Chen,Weiduo Zhu,Lijiang Tan,Digen Ruan,JiaJia Fan,Yunhua Chen,Xianhui Meng,Qingshun Nian,Xin Zhao,Jinyu Jiang,Zihong Wang,Shuhong Jiao,Xiaojun Wu,Xiaodi Ren
Ethers are promising electrolytes for lithium (Li) metal batteries (LMBs) because of their unique stability with Li metal. Although intensive research on designing anion-enriched electrolyte solvation structures has greatly improved their electrochemical stabilities, ether electrolytes are approaching an anodic bottleneck. Herein, we reveal the strong correlation between electrolyte solvation structure and oxidation stability. In contrast to previous designs of weakly solvating solvents for enhanced anion reactivities, the triglyme (G3)-based electrolyte with the largest Li+ solvation energy among different linear ethers demonstrates greatly improved stability on Ni-rich cathodes under an ultrahigh voltage of 4.7 V (93% capacity retention after 100 cycles). Ether electrolytes with a stronger Li+ solvating ability could greatly suppress deleterious oxidation side reactions by decreasing the lifetime of free labile ether molecules. This study provides critical insights into the dynamics of the solvation structure and its significant influence on the interfacial stability for future development of high-efficiency electrolytes for high-energy-density LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 35
·25481-25489
·
IF 3.9
Lei Dong,Xin Shu,Qianping Ran
Incorporating nano-SiO2 particles into cement paste has garnered significant attention for enhancing the performance of hardened cement paste. However, the agglomeration of nanoparticles in the pore solution of cement–water system poses a challenge for cost-effective and efficient applications. Meanwhile, superplasticizers containing phosphate groups exhibit strong complexation with calcium ions and show promise in improving the dispersion performance. This study introduces a surface chemical modification technique to enhance the dispersibility of nano-SiO2. Firstly, poly(isoprenyl oxy poly(ethylene glycol) ether-random-vinylphosphonic acid) (PTPEG–VPA), a silanized superplasticizer containing phosphate moieties, is copolymerized and chemically grafted onto pristine nano-SiO2 surfaces through condensation and silanization processes. The resulting core–shell SiO2@PTPEG–VPA nanoparticles are comprehensively characterized using FT-IR spectroscopy, TGA, DLS, TEM, BET surface area analysis, and zeta potential measurements. The results indicate that introducing phosphate moieties improves the dispersion capacity of grafted copolymers, thereby reducing the severe agglomeration of nano-SiO2 in solution. Subsequently, the impact of SiO2@PTPEG–VPA on cement hydration and early-age strength development is investigated using microcalorimetry and TGA characterization. Finally, a mechanism is proposed to explain the observed retarding effects of grafted PTPEG–VPA on pristine SiO2. Overall, this study provides novel insights into the chemical design of nanoparticles, aimed at manipulating cement paste properties.
研究领域:
材料科学
·
土木工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
·
2014
·Vol. 12
·期 18
·2969-2978
·
IF 3.487
Jiajun Zhang,Pinhua Li,Lei Wang
A novel KOAc-promoted α-position C–H activation and alkynylation of ethers with alkynyl bromides to 2-alkynyl ethers has been developed under transition-metal-free and simple reaction conditions. In addition, this methodology can also be extended to the vinylation of ethers with vinyl bromides in excellent regio- and stereo-selectivity. A wide range of direct C(sp)–C(sp3) and C(sp2)–C(sp3) bonds has been formed through this protocol, which offers a new and alternative route.
研究领域:
有机化学
·
合成化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zewen Yang,Dandan Jia,Qing Zhao,Depeng Song,Yuan Zhang,Jing Gao,Xiaolin Sun,Takeo Ohsaka,Futoshi Matsumoto,Qiang Shen,Jianfei Wu
Lithium–sulfur (Li–S) batteries and lithium–selenium (Li–Se) batteries that contain only one single active element have unique advantages and disadvantages. Inspired by ternary lithium batteries, multielement chalcogenide compounds with integrated advantages may improve upon the performance of lithium-chalcogenide batteries at the source. In this work, activated carbon (AC) with an Al2O3@SiO2 heterojunction is used as the carrier, and the performances and mechanisms of elemental substances (X/AC, X = S, Se, and Te) are studied in ether and ester electrolytes as the basis for preparing multielement chalcogenide composites (SST/AC, SST: S–Se–Te compound). In the ester electrolyte system, SST811/AC (where S/Se/Te = 8:1:1, molar ratio) exhibited the best cycling performance, and the capacity remained at 1024.9 mA h g–1 after 300 cycles. The characterization results revealed the mechanisms and sequences of the gradual liquid-phase reactions of SST/AC in ether electrolytes and the direct solid-phase reactions in ester electrolytes. The active elements in SST/AC fully demonstrated their own functions, enabling the effective construction of new lithium-chalcogenide battery systems. This work provides inspiration for the subsequent research of multielement lithium-chalcogenide batteries and paves the way for their application.
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
危险品化学品经营许可证（带存储）