NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 12
·5091-5097
·
IF 3.269
Zhi Wang,Zuopeng Li,Yunhe Jin,Wei Liu,Linhai Jiang,Qinghua Zhang
A series of hydrophobic room temperature ionic liquids (RTILs) composed of organic superbase-derived cations and the TFSI anion (bis(trifluromethylsulfonyl)imide) were designed and synthesized. The structures of these new RTILs were determined using 1H-NMR, 13C-NMR, IR, and elemental analysis. Their physicochemical properties, including thermal properties, density, viscosity, and electrochemical properties, were investigated. Thermogravimetric analysis (TGA) revealed that these superbase-derived RTILs have high decomposition temperatures of up to 450 °C. Studies on their electrochemical properties demonstrated that these RTILs have relatively wide electrochemical windows of up to 4.6 V and good ionic conductivities at room temperature. Their application potential as novel electrolytes in supercapacitors was also evaluated.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Guangpeng Ma,Feng Pan,Xinpu Zhou,Zhipeng Yong,Xiaodong Wang,Chenglong Li,Wenyu Bai,Shuang Wang
Hydrogel electrolytes have attracted wide attention because of their high ionic conductivity and anti-leakage characteristics. However, these advantages are hindered under extreme conditions. In this paper, an ionogel electrolyte for supercapacitors with a wide temperature range is constructed. It consists of a double cross-linked structure of polyacrylamide and 1-vinyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([VMIM][TFSI]), with the addition of ethylene glycol and choline chloride to form a deep eutectic solvent with a large hydrogen bonding network. On this basis, a partial ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM] [TFSI]) is innovatively added to choline chloride. The ionogel electrolyte exhibits a conductivity of up to 13.26 mS/cm at 90 °C. A flexible supercapacitor is assembled with activated carbon electrodes and has a wide voltage window of 2.4 V. The specific capacitance and energy density are 43.81 F/g and 35.1 Wh/kg, respectively, when the current density is 0.25 A/g. Remarkably, the device retains high coulombic efficiency (97.1%) and capacitance retention (94.3%) after 10 000 cycles. These excellent properties show that the ionogel electrolyte prepared in this work has broad application prospects.
研究领域:
材料科学
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电化学
·
能源存储
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Jing Zeng,Zulai Cao,Yang Yang,Yunhui Wang,Yueying Peng,Yiyong Zhang,Jing Wang,Jinbao Zhao
The commercial applications of rechargeable magnesium batteries (RMBs) are hindered by the slow diffusion kinetic of Mg 2+ ions in cathode materials. To overcome this problem, we design a new Na-Mg hybrid battery with the NaTi 2 (PO 4 ) 3 @Carbon (NTP@C) nanoparticles as a cathode material, the Mg metal as an anode and the Mg(TFSI) 2 + NaBH 4 - triglyme/1,2-Dimethoxyethane (DME) as a hybrid electrolyte. For the first time, the Mg(TFSI) 2 is applied as a Mg 2+ ions source in the chlorine-free Na-Mg hybrid electrolyte with NaBH 4 as both Na + ions source and moisture scavenger. The NTP@C/Mg hybrid battery shows excellent electrochemical performance. The corresponding average capacity decay after 1000 cycles is only 0.004% and 0.008% per cycle at 2 C and 10 C, respectively. Even at 20 C, about 60 mAh g −1 can be obtained after 26000 cycles. The impressive capacity retention of 93.7% and 90.2% can be obtained at 5 and 10 C, respectively. The excellent electrochemical performance of the hybrid battery confirms the feasibility using Mg(TFSI) 2 in the chlorine-free hybrid electrolyte for long term cycle. The developed NTP@C/Mg hybrid battery possesses the advantages of excellent electrochemical performances, good safety and low cost, making it promising for the commercial applications, especially for the large-scale energy storages.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Caiyun Wang,Xingxing Wu,Yufan Xia,Xuan Zhang,Hongge Pan,Mi Yan,Yong Li,Yinzhu Jiang
Mg metal anodes experience significant passivation of harmful side reactions in conventional electrolyte consisting of magnesium bis(trifluoromethane sulfonyl)imide (Mg(TFSI) 2 ) in 1,2-dimethoxyethane (DME), which critically impedes the advancement of high-performance rechargeable magnesium batteries. Herein, an innovative electrolyte system comprising an ultra-dilute 0.02 M Mg(TFSI) 2 in DME with 4-chlorobutyl methyl ether (CME) as co-solvent is strategically devised. This unique formulation effectively suppresses the formation of TFSI − -derived passivation byproducts while simultaneously facilitating the establishment of protective Cl-rich interphase, thereby achieving exceptional reversibility in Mg plating/stripping processes. Remarkably, Mg electrodes demonstrate stable cycling performance with a minimal overpotential of 70 mV at 0.1 mA cm −2 in the optimized 0.02 M Mg(TFSI) 2 -DME/CME electrolyte. More impressively, the system maintains reversible electrochemical operation for 400 h even at 2 mA cm −2 . This work presents a novel electrolyte formulation for overcoming the limitations of Mg metal anode in conventional Mg(TFSI) 2 based electrolytes, offering new perspectives for the development of next-generation rechargeable magnesium batteries.
研究领域:
电化学
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能源材料
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电池技术
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产品关联
DOI
PubMed
高影响因子
Environmental Technology & Innovation
·
2024
·
IF 6.7
Bo Sun,Xiaona Pan,Yu Tian,Wenlong Bi,Menglin Feng,Fenwu Liu,Qingjie Hou
Microbial fuel cells (MFCs) represent a promising clean energy technology with significant application potential. However, their implementation is constrained by the limitations of current membrane materials. Polyvinylidene fluoride-hexafluoropropylene (PVDF-co-HFP) is a material that has garnered interest in the field of electrochemical systems because of its facile moldability into various shapes and sizes of membranes, positioning it as a highly promising alternative to high-cost commercial membranes. Nevertheless, enhancing its electrochemical characterization remains a pivotal challenge to be surmounted for its broad adoption. In this study, an efficient PVDF-co-HFP membrane, augmented with PP13-TFSI ionic liquid and sulfonation (Membrane P-I&S), was successfully synthesized, and its potential as an ion exchange membrane in MFCs was evaluated. The findings indicated that chlorosulfonic acid considerably enhances the hydrophilicity and proton transport properties of PVDF-co-HFP, with the ionic liquid posited as an effective means to augment the sulfonation effect. An MFCs incorporating Membrane P-I&S demonstrated a remarkable current production capacity and power density, exceeding those of the unmodified membrane by more than two and threefold, respectively. In addition, the MFCs based on Membrane P-I&S displayed prolonged cycling stability with a notably porous architecture and enhanced biofouling resistance. This study validates the development of a high-efficiency, cost-effective, and environmentally friendly membrane fabrication approach for application in bioelectrochemical systems. This will help promote the application of MFCs in the field of wastewater treatment and resource recovery.
研究领域:
环境科学
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生物电化学
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材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
·
IF 9.5
Xin Jiang,Junwei Zhou,Xinke Zhong,Zhaopeng Hu,Rongyan Hu,Yihu Song,Qiang Zheng
Electromagnetic interference (EMI) shielding materials with stretchability are important for developing wearable and flexible appliances. Herein, lithium bis(trifloromethanesulfonyl)imide (Li-TFSI)-doped poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and carboxylated styrene-butadiene rubber (XSB) latex are used to prepare stretchable EMI shielding composite films of 0.2 mm in thickness. In these films, the doped PEDOT:PSS nanoparticles form tenuous conductive pathways between the hexagonally packed latex particles, resulting in higher EMI shielding efficiency (EMI SE) compared with the films containing traditional dopant ethylene glycol. For the purpose of stretchable EMI shielding, the films containing 6 wt % PEDOT:PSS and 6 wt % Li-TFSI demonstrate EMI SE of 50 and 30 dB (12.4 GHz) at 0 and 100% strains, respectively, being the highest values among the reported shielding composites except for those using liquid metal as the filler. The investigation also provides a simple and environmentally friendly preparation method being highlighted for the development of lightweight stretchable EMI shielding materials for applications in flexible electronics in the near future.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhiang Li,Shuai Liu,Hao Xu,Fan Ding,Weimin Wang,Kaikai Song,Ting Liu,Lina Hu
Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) is widely used in polyethylene oxide (PEO) based solid electrolytes preparation due to its high ionic conductivity, electrochemical stability towards lithium and excellent mechanical properties. However, agglomeration of LLZTO and the inert interfacial layer for Li + transport between LLZTO and PEO limit its application. Herein, we systematically study the effect of different contents of 1-methyl-1-propylpiperidinium bis(trifluoromethylsulfonyl)imide (denoted as PP13-TFSI) ionic liquid on PEO/LLZTO composite solid electrolytes (CSEs). PP13-TFSI, which provides a new pathway for Li + transport and promotes the uniform dispersion of LLZTO. By adjusting the proportion of PP13-TFSI reasonably, the agglomeration of LLZTO is weakened, the crystallinity of PEO is reduced, and the growth of lithium dendrites is also inhibited. Therefore, the CSEs with high ionic conductivity (2.03 × 10 −4 S cm −1 , 30 ℃) enhanced by PP13-TFSI. Li||Li symmetric batteries exhibit stable cycling up to 6000 h at 60 °C, and can cycle stably for up to 3000 h at 28 °C. LiFePO 4 ||Li full batteries exhibit high-capacity retention rate (≈ 90.5 %) after 500 cycles at 1 C. This work not only systematically study the effects of different contents of PP13-TFSI on CSEs, but also provide a simple composite solid electrolyte strategy.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
Energy Storage Materials
·
2023
·
IF 20.4
Cong Kang,Jiaming Zhu,Yijie Wang,Shanshan Ye,Yueping Xiong,Fanpeng Kong,Geping Yin
Nitrile electrolytes have attracted extensive attention for achieving high-voltage lithium metal batteries. However, the poor compatibility of nitrile electrolyte with Li anode remains a huge challenge owing to severe side reactions. Herein, changing concentration of LiTFSI in succinonitrile (SN) is proposed to improve interface compatibility by regulating the solvation structure. The higher coordination number (1.3) of TFSI − in high concentration electrolytes results in a LiF-rich SEI film, accounting for the superior performance of LiNi 0.8 Co 0.1 Mn 0.1 O 2 |Li cell with negligible capacity fade after 100 cycles at 0.5 C. Density functional theory (DFT) suggests that the solvation structure with a high coordination number of TFSI − towards Li + leads to a reduced Lowest Unoccupied Molecular Orbital (LUMO) energy level, which promotes the decomposition of TFSI − to form LiF-rich film. Also, a reduced decomposition energy barrier of anion is demonstrated. This work provides an encouraging way to enhance interface stability via modulating the solvation structure achieved by regulating concentration.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xin Jiang,Zhaopeng Hu,Shichao Xu,Bin Hu,Benteng Liu,Qiao Li,Yihu Song,Qiang Zheng
Stretchable electromagnetic shields have garnered significant attention in the burgeoning field of flexible devices, while traditional strategies developed to maintain adequate electromagnetic shielding performance under large strains are more challenging at low temperatures. Herein, elastic electromagnetic shielding films with segregated conductive network were produced by an extremely simple method of evaporating carboxylated nitrile butadiene rubber latex containing lithium bis(trifloromethanesulfonyl)imide doped poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate). The films of 0.2 mm in thickness are highly stretchable at −20 °C and exhibit an electromagnetic interference shielding efficiency of more than 30 dB at 100 % strain and −10 °C. These properties underscore the potential of the films as effective stretchable EMI shields in low-temperature conditions. Experiments demonstrating the films' ability to block Bluetooth signals from ESP32 chip microcontrollers and electromagnetic waves from Tesla coils further confirm their usefulness, highlighting the practicality of protecting flexible devices in cold environments.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Lei Zhang,Ying Wang,Zhijian Wu,Hongyu Wang
In dual-ion batteries (DIBs) utilizing organic electrolyte solutions, the combinations of electrolyte salt and solvent serve as a determiner of the electrochemical performance of graphite electrode partially because solvent participates in the anion intercalation procedure. In this case, every solvated–anion@graphite intercalation compound possesses the characteristic intercalated gallery height. However, in Li/graphite DIBs with concentrated LiTFSI (lithium bis(trifluoromethanesulfonimide))–alkyl phosphates (ca. trimethyl, triethyl, tripropyl, tributyl phosphate) solutions, solvated–TFSI–@graphite intercalation compounds have the nearly identical intercalated gallery height of about 0.803 nm, which may be mainly attributed to both the big size of TFSI– anion and the rigid PO4 framework of these alkyl phosphate solvents.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Rupeng Zhang,Can Cui,Ruinan Li,Yaqi Li,Chunyu Du,Yunzhi Gao,Hua Huo,Yulin Ma,Pengjian Zuo,Geping Yin
Due to the good safety and high energy density , rechargeable Mg-metal batteries (RMMBs) have been regarded as a potential competitor of Li-metal batteries (LMBs). However, the Mg(TFSI) 2 -based conventional electrolytes will cause large overpotential in reversible plating/stripping attributed to the high ion transport impedance of the electrolyte decomposition products. Here, an artificial interphase composed of amorphous (a-) MgCl 2 @polymer on the Mg-metal surface is prepared by in-situ chemical reaction of metallic Mg with H 3 PO 4 and SiCl 4 in sequence, and can effectively inhibit the electrolyte decomposition and facilitate Mg 2+ transport, which plays the role of solid electrolyte interface (SEI) on Mg anode. The Mg-Mg symmetrical cell with modified Mg electrode exhibits lower overpotential (~0.25 V) and interfacial impedance than bare Mg electrode in 0.5 M Mg(TFSI) 2 /DME electrolyte. The voltage hysteresis in the Mg-S and Mg-Mo 6 S 8 batteries with the modified Mg anode is greatly improved compared to bare Mg anode. This work provides a new idea for future applications of passivation-free Mg-metal anode technology in the MMBs based on conventional electrolytes.
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高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 40
·2201838
·
IF 32.086
Guiru Sun,Rui Gao,Hailiang Jiao,Dan Luo,Yan Wang,Zexu Zhang,Wei Lu,Ming Feng,Zhongwei Chen
The major challenges for Li-O 2 batteries are sluggish reaction kinetics and large overpotentials due to the cathode passivation resulting from insulative and insoluble Li 2 O 2 . Here, a novel nanodot (ND)-modified electrolyte is designed by employing cobalt bis(trifluoromethylsulfonyl)imide (Co(TFSI) 2 ) as an electrolyte additive. The Co(TFSI) 2 additive can react with discharge intermediate LiO 2 and product Li 2 O 2 to form CoO NDs. The generated CoO NDs are well dispersed in electrolyte, which integrates both the high catalytic activity of solid catalyst and the good wettability of soluble catalyst. Under the catalytis of CoO NDs, Li 2 O 2 is produced and deposits on the cathode together with them. At the recharge process, these well dispersed CoO NDs help to decompose solid Li 2 O 2 at a lower overpotential. The Li-O 2 cells with Co(TFSI) 2 exhibit a long cycle life of 200 cycles at a current density of 200 mA g −1 under a cutoff capacity of 1000 mAh g −1 , as well as a superior reversibility associated with the Li 2 O 2 formation and decomposition. The study is expected to broaden the range of electrolyte additives and provide a new view to developing highly dispersed NDs-based catalysts for Li-O 2 batteries.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）