JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 2
·1058-1063
·
IF 1.395
Xiulan Zhao,Qin Zhang,Lixin Xue,Qianru Shi,Kang Tao
Poly(ether ether ketone) with pendent sulfonimide groups (B-SPEEK) was prepared from poly(ether ether ketone), sulfuric acid, thionyl chloride, para -toluene sulfonate, and pyridine. The prepared B-SPEEK was characterized by Fourier transform infrared spectroscopy, 1 H-NMR, and thermogravimetric analysis. The swelling of the gels was examined in N,N -dimethylacetamide (DMAC), N,N -dimethylformamide (DMF), 1-methyl-2-pyrrolidinone (NMP), dimethyl sulfoxide (DMSO), and a DMSO/water mixture. The gel showed extremely high swelling in DMSO, DMF, DMAC, and NMP. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1058-1063, 2013
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2014
·
IF 3.766
Heng Zhang,Li Li,Wenfang Feng,Zhibin Zhou,Jin Nie
A new family of polymeric ionic liquids (PILs) based on alkyl and alkyl ether substituted ammoniums and perfluorinated sulfonimides (i.e., bis(fluorosulfonyl)imide (FSI − ), and bis(trifluoromethanesulfonyl)imide (TFSI − )) have been synthesized by polymerization of the corresponding ionic liquid monomers (ILMs). Their structures and compositions have been characterized by 1 H and 19 F NMR, FTIR and viscosity-average molecular weight ( M v ). The physicochemical properties of both the ILMs and the PILs have been studied in terms of thermal stability, phase transition, and ionic conductivity . All the prepared ILMs and PILs reveal excellent thermal stabilities to greater than 250 °C. The PILs containing alkyl ether side unit show significant decrease in glass transition temperature ( T g ), the values of T g of the alkyl ether based-PILs are all significantly lower by 10–77 °C in magnitude than those of the corresponding alkyl based ones. The ionic conductivity of alkyl ether based-PILs in the best case increases up to 4.0 × 10 −6 S cm −1 at 30 °C, and reaches 7.6 × 10 −5 S cm −1 at 60 °C, and outperform their ammonium counterparts with alkyl side chain that were synthesized as references.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2014
·
IF 2.112
Heng Zhang,Wenfang Feng,Zhibin Zhou,Jin Nie
A new polymeric ionic liquid (PIL), poly(1-vinyl-3-methylimidazolium) bis(fluorosulfonyl)imide (PVyMIM-FSI), has been prepared by polymerization of the monomer of ionic liquids, 1-vinyl-3-methylimidazolium bis(fluorosulfonyl)imide (VyMIM-FSI). Its structure and composition have been characterized by 1 H and 19 F NMR, and viscosity-average molecular weight ( M v ). For comparison, the corresponding PIL, poly(1-vinyl-3-methylimidazolium) bis(trifluoromethanesulfonyl)imide (PVyMIM-TFSI), is also prepared and characterized. The physicochemical properties of the binary composite electrolytes of lithium bis(fluorosulfonyl)imide (LiFSI)/PVyMIM-FSI with various concentrations of LiFSI have been comparatively studied with those of the corresponding lithium bis(trifluoromethylsulfonyl)imide (LiTFSI)/PVyMIM-TFSI system, in terms of DSC , TGA , ionic conductivity , and lithium ion transference number ( t Li + ). Both the FSI − - and TFSI − -based PILs are thermally stable up to 250 °C. While both types of the prepared PILs show a significant decrease in glass transition temperature ( T g ) upon addition of lithium salt, the values of T g for the composite electrolytes of LiFSI/PVyMIM-FSI are all significantly lower by 20–60 °C in magnitude than those of the corresponding LiTFSI/PVyMIM-TFSI composite ones, indicating much better plasticizing effect for FSI − vs. TFSI − . The ionic conductivities of LiFSI/PVyMIM-FSI are all higher by about 2 orders in magnitude than those of the corresponding LiTFSI/PVyMIM-TFSI with the same concentration of lithium ions.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2021
·
IF 4.354
Haopeng Wu,Chukai Shao,Di Wu,Liang Jiang,Hongquan Yin,Fu-Xue Chen
A highly regioselective protocol for intermolecular thiocyanation-amination of alkynes by N-thiocyano-dibenzenesulfonimide (NTSI) as the SCN and nitrogen sources has been developed. A C–S bond and C–N bond are simultaneously constructed in only one step. The reaction under simple mild conditions features a broad substrate scope, atom economy, high yields (up to 94%), and excellent functional group tolerance.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Heng Zhang,Chengyong Liu,Liping Zheng,Wenfang Feng,Zhibin Zhou,Jin Nie
New solid polymer electrolytes (SPEs) comprised of lithium bis(fluorosulfonyl) imide (Li[N(SO 2 F) 2 ], LiFSI) and polymeric ionic liquid (i.e., poly[ N , N -dimethyl- N -[2-(methacryloyloxy) ethyl]- N -[2-(2-methoxyethoxy) ethyl]ammonium] bis(fluorosulfonyl) imide, P[C 5 O 2 N MA,11 ]FSI) have been prepared and characterized. For comparison, the corresponding SPEs, lithium bis(trifluoromethylsulfonyl) imide (Li[N(SO 2 CF 3 ) 2 ], LiTFSI)/poly[ N , N -dimethyl- N -[2-(methacryloyloxy) ethyl]- N -[2-(2-methoxyethoxy) ethyl]ammonium] bis(trifluoromethylsulfonyl) imide (P[C 5 O 2 N MA,11 ]TFSI), are also prepared and characterized. Their physicochemical properties have been investigated in terms of phase transition behavior, ionic conductivity , lithium-ion transference number ( t Li + ), electrochemical stability, and with particular attention to the interfacial behavior between lithium electrode and SPEs. It has been demonstrated that the ionic conductivities of LiFSI/P[C 5 O 2 N MA,11 ]FSI electrolyte are higher than those of the corresponding TFSI-based one. The interface resistances of Li symmetric cell (Li metal | polymer electrolytes | Li metal) using LiFSI/P[C 5 O 2 N MA,11 ]FSI electrolyte are much lower than those using LiTFSI/P[C 5 O 2 N MA,11 ]TFSI electrolyte. These outstanding properties of the FSI-based electrolyte make it attractive as SPEs for Li battery .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SYNLETT
·
2018
·Vol. 29
·期 09
·1244-1248
·
IF 2.369
Xiangwen Kong,Lihua Liu,Siqin Luo,Shilu Fan,Haisheng Qian,Hua Xiao
A triphenylphosphine-promoted [3+2] cycloaddition of α,γ-bis-substituted allenoates and N-tosylaldimines followed by alkene isomerization was disclosed, affording a series of functionalized 2-pyrroline derivatives in moderate chemical yields with random diastereoselectivities.
研究领域:
有机化学
·
药物化学
·
合成方法学
·
杂环化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2013
·Vol. 3
·期 27
·10722-10730
·
IF 2.562
Yue Lin,Jie Li,Yanqing Lai,Changfu Yuan,Yun Cheng,Jin Liu
We report on making a wider operating temperature solid polymer electrolyte (SPE) consisting of polysiloxane, poly(vinylidene fluoride) and lithium bis(trifluoro-methanesulfonyl)imide (LiTFSI). When 30 wt% LiTFSI was added to the electrolyte, the ionic conductivities of 7.9 × 10−5 S cm−1 at 25 °C and 8.7 × 10−4 S cm−1 at 80 °C were measured. However, with 20 wt% LiTFSI the electrolyte has better mechanical properties and a better compatibility with lithium electrodes compared to other LiTFSI concentrations. According to TGA-DSC thermal analysis, the SPE shows a relatively high decomposition temperature of 275 °C. The electrochemical windows up to 5.17 V at 25 °C and 5.05 V at 60 °C were measured, which are higher than currently used liquid organic electrolytes. Batteries employing LiFePO4 as the cathode, lithium foil as the anode and the SPE thin film as the electrolyte were assembled. At 25 °C, the initial discharge capacity at 0.2 C is 144 mA h g−1 and 98% of the capacity is retained at the 100th cycle; the discharge capacity is 115 mA h g−1 after 100 cycles at 1 C and there is no significant decay after 200 cycles. Furthermore, the battery reaches the discharge capacity of 144 mA h g−1 at the 100th charge–discharge cycle at 60 °C and 1 C. Such results indicate the commercial prospect of the electrolyte in all-solid-state lithium ion batteries. The use of this electrolyte will lower the safety risk and extend the operation temperature range of electric devices.
研究领域:
电化学
·
材料科学
·
能源存储
·
固态离子学
·
电池技术
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2014
·Vol. 5
·期 8
·3098-3106
·
IF 5.368
Yu Jin,Yufeng Ji,Xiaojiang He,Suli Kan,Haidong Xia,Binqi Liang,Jia Chen,Hao Wu,Kai Guo,Zhenjiang Li
o-Benzenedisulfonimide (OBS) was demonstrated for the first time to be a safe, recyclable, and water-tolerant Brønsted acidic catalyst for the ring-opening polymerization (ROP) of δ-valerolactone and ε-caprolactone using benzyl alcohol as the initiator. The polymerizations proceeded to afford poly(δ-valerolactone) and poly(ε-caprolactone) with controlled molecular weights and narrow polydispersities. The kinetics and chain extension experiments were carried out to confirm the controlled/living fashion of the polymerizations. In addition, 1H NMR and MALDI-TOF MS measurements strongly indicated that the initiator residue was incorporated into the obtained polymers. Furthermore, well-defined poly(δ-valerolactone)-block-poly(ε-caprolactone) has been successfully synthesized via OBS-catalyzed ROP.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Han Jin,Huayun Liu,Hao Cheng,Peng Zhang,Miao Wang
Commercialization of the LMBs is subject to two formidable technical challenges, the instability of Li metal against all the organic solvents , and the short circuit caused by the dendritic lithium deposits. Lithium Bis(fluorosulfonyl)imide salt has exhibited an impressive performance for lithium-dendrite suppression and cycling efficiency improving at low current densities. Here, we use LiNO 3 as the film-forming additive for further passivation of the Li metal anodes . Following the addition of LiNO 3 , the cycling performance of the cells with 2.5 M LiFSI-0.75 M LiNO 3 /DOL as electrolyte at high currents is improved obviously. The symmetrical lithium–metal cells can be cycled for 1000 cycles with more than 1000 h at 5 mA cm −2 with a stripping/plating capacity of 2 mAh cm −2 . Moreover, the Li/Cu cell could be cycled for 400 cycles with a stable and high average Coulombic efficiency (CE) of 98.8% at 3 mA cm −2 with a capacity of 2 mAh cm −2 . Besides, the electrolyte contains an well adaptability to the electrode of LiFePO 4 and improves the cycling stability of the lithium metal. Consequently, LiNO 3 demonstrates an excellent performance as a film-forming additive in the LiFSI/DOL electrolyte for further passivation of the Li metal anodes.
研究领域:
电化学
·
能源材料
·
电池技术
·
界面化学
·
电极材料
✓ 已验证
DOI
高影响因子
ChemPlusChem
·
2024
·
IF 3
Yong Wang,Xueying Lin,Xianyu Ying,Shan Hu,Hongjun Zhu
A facile C–H amination of quinazoline employing N-fluorobenzenesulfonimide (NFSI) as the amination source has been disclosed in the absence of any metal, oxidant or additive. The methodology shows a board range of quinazolines with different functional groups in moderate to good yields up to 87%. Furthermore, gram-scale reaction, desulfonylation to amine and synthesis of pharmaceutical intermediate were also investigated, which demonstrates potential applications in medicinal chemistry. A plausible amination mechanism is proposed via F+ transfer accompanied by the removal of one molecule of PhSO2F. DFT studies with experimental work suggest that the mechanism via F+ transfer is more favorable than the free radical one.
研究领域:
有机化学
·
药物化学
·
合成化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry Letters
·
2022
·
IF 6.888
Mengyuan Liu,Le Ma,Kehan Xie,Piaopiao Zeng,Shijing Wei,Feng Zhang,Chao Li,Feijiu Wang
Cesium lead halide perovskite (CsPbX3, X = Cl, Br, and I) nanocrystals (NCs) have attracted enormous attention because of their great potential for optoelectronic applications, such as light-emitting diodes (LEDs). However, the photoluminescence and surface ligands of CsPbX3 NCs have a great impact on their device applications. Herein, we report a molecular superacid of bis(trifluoromethane)sulfonimide (TFSI), which could boost the photoluminescence in the metal halide perovskite nanocrystals. In particular, the photoluminescence quantum yield (PLQY) of CsPbI3 nanocrystals could be greatly improved from 28.6% to near 100% with the superacid treatment. The improved PLQY in CsPbX3 nanocrystals is mainly contributed from the surface passivation based on the characterizations. The CsPbX3 nanocrystals were further modified with PMMA, which could greatly improve their stability while preserving high photoluminescence and good dispersion. The use of superacid combined with a polymer for improving the photoluminescence and stability in CsPbX3 provides an alternative strategy for optoelectronics.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
化学
✓ 已验证
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2017
·
IF 4.396
Peng Zhang,Jiajia Zhu,Miao Wang,Nobuyuki Imanishi,Osamu Yamamoto
We propose a novel binary electrolyte of lithium bis(fluorosulfonyl)imide/1,3-dioxolane, that exhibits excellent performance for the suppression of lithium-dendrite growth and stability against lithium metal. With 2.5 M lithium bis(fluorosulfonyl)imide in 1,3-dioxolane, long short-circuit onset-times of 72.3 and > 190 h are observed in Li/Li cells polarized at galvanostatic current densities of 1.0 and 0.5 mA cm − 2 , respectively. The coulombic efficiencies for the repeated Li plating/stripping in the 2.5 M electrolyte at 1.0 and 0.5 mA cm − 2 are as high as 99.0% and 99.5%, respectively. The electrolyte structure is changed with an increase in the concentration speculated from Raman spectra , which enables the reactivity toward lithium metal to be lowered.
研究领域:
电化学
·
能源材料
·
电池科学
·
电极界面
·
电解液化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）