ACS Applied Materials & Interfaces
·
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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PubMed
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.
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PubMed
高影响因子
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.
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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.
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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.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Rupeng Zhang,Can Cui,Rang Xiao,L. Ruinan,Tiansheng Mu,Hua Huo,Yulin Ma,Geping Yin,Pengjian Zuo
The Mg-metal batteries (MMBs) as a forceful competitor for Li-metal batteries (LMBs) have the advantages of high-safety and high-volume energy density . Whereas, the MMBs still confronts two vital issues to be addressed, including the incompatibility of conventional TFSI-based electrolytes with the Mg electrode and the poor reversibility of the cathode. In this work, to satisfyingly settle the incompatibility, an artificial interphase was first pre-constructed by high-temperature displacement reaction of CuCl 2 and Mg metal, responsible for the faster charge-transfer rate and the lower Mg plating/stripping overpotential (∼0.2 V) in Mg symmetric cells. Regarding the Mg-Mo 6 S 8 full cells, to enhance the reversibility and rate performance, Mg/Li hybrid batteries were designed. Consequently, the Mg-Mo 6 S 8 battery can achieve excellent cycle stability and deliver a desirable capacity. Even as the current density increases to 1C, the battery still shows a desirable capacity of 92 mAh g −1 over 500 cycles.
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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.
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Journal of Energy Storage
·
2026
·
IF 9.8
Mingdong Du,Yanxia Liu,Chenxing Wang,Fulai Qi,Mingyu Shi,Wenjing Liu,Shengnan He,Zhijun Wu,Zhenglong Li,Chenchen Li,Hongge Pan
Lithium (Li) metal is the ideal anode material for building future large-scale energy storage batteries. Nevertheless, Li metal anodes suffer from incompatibility with conventional carbonate-based electrolytes, which possibly leads to severe Li dendrite growth, undesirable electrolyte decomposition, and rapid deterioration of the cycling performance. To address these challenges, the traditional commercial electrolyte is doped with cerium bis(trifluoromethanesulfonyl)imide (Ce(TFSI) 3 ) for enhanced Li anode stability. The low migration rate of Ce 3+ leads to formation of a Ce-enriched corrosion resistant solid electrolyte interphase (SEI), while the TFSI − anion enables a significant enhancement of inorganic components within the SEI, thus facilitating uniform Li + deposition and mitigation of detrimental electrolyte decomposition. The resulting electrolyte exhibits superior electrochemical stability against Li anodes. This is evidenced by a Li||Li symmetric cell that cycles steadily for over 1300 h at a current density of 1 mA cm −2 and a capacity of 1 mAh cm −2 , along with a exchange current density of 1.3183 mA cm −2 . Additionally, Li||LiFePO 4 full cell demonstrates 76.8% capacity retention (110.39 mA cm −2 ) after 900 cycles at 1 C. This work illustrates the significant impact of a corrosion-resistant interface on Li anode performance and offers a valuable idea for constructing high-durability SEI layers.
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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.
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JOURNAL OF MATERIALS RESEARCH
·
2026
·
IF 2.9
Li Fengyin,Jiang Xueao,Ma Ning,Zhao Min,Lv Yang,Cao Xuefei,Hu Zewei,Hua Shuai,Zhang Limin,Wang Renke
Poly(ethylene oxide) (PEO)-based solid polymer electrolytes are attractive for energy storage, especially for solid-state lithium metal batteries, but their use is hindered by slow Li + transport and unstable Li interfaces. Here, we report a low-loading ionic liquid (IL)-assisted local solvation strategy by incorporating a highly concentrated LiTFSI/sulfolane component and a small amount of Py14TFSI into PEO. Spectroscopy and DFT calculations show that Py14TFSI acts as a coordination regulator rather than a simple plasticizer, decreasing Li + -TFSI − contact ion pairs from 58% in PS to 41% in PSP and promoting more weakly coordinated TFSI − species. The optimized PSP electrolyte delivers an ionic conductivity of 0.116 mS cm −1 at 30 °C, an activation energy of 28.55 kJ mol −1 , and a Li + transference number of 0.40. Consequently, Li||PSP||Li cells cycle for 250 h at 1 mA cm −2 , and LFP||Li cells retain 97% capacity after 150 cycles. Graphical abstract
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高影响因子
POLYMER
·
2025
·
IF 4.5
Zhanpeng Xu,Kang Li,Huihui Xu,Tingzi Yan,Yongjin Li
This study utilized a straightforward one-step method, melt extrusion , to blend polymethyl methacrylate (PMMA) with 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene (BPEF) to fabricate optically transparent polymer blends , utilizing Mg(TFSI) 2 as the catalyst for the ester exchange reaction. All polymer blends demonstrated excellent mechanical and optical properties , achieving high transparency (≥90 %) in the visible spectrum. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) results indicated that the blends formed a thermodynamically homogeneous system. Additionally, gel permeation chromatography (GPC) confirmed the occurrence of ester exchange reactions between PMMA and BPEF in both salted and unsalted blends. Very interestingly, without Mg(TFSI) 2 one hydroxyl group of BPEF is linked to PMMA side group through transesterification reaction, leading to a zero birefringence . Nonetheless, the inclusion of Mg(TFSI) 2 appears to facilitate the ester exchange reaction between both hydroxyl groups of BPEF and a single PMMA chain, which causes a cyclic ring structure. Such cyclic ring structure orients parallel to the planar plan, which then increases n // and also Δn.
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