ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Dan Huang,Shuangshuang Tan,Maosheng Li,Dandan Wang,Chunhua Han,Qinyou An,Liqiang Mai
The application of high-energy Mg/S batteries was obstructed by the insufficiency of low-cost and non-nucleophilic electrolyte. In this work, a non-nucleophilic electrolyte was prepared by facilely dissolving Mg(CF3SO3)2, MgCl2, and AlCl3 in 1,2-dimethoxyethane (DME). The equilibrium species of the MTB electrolyte mainly comprise [Mg2(μ-Cl)2(DME)4]2+ and [(CF3SO3)AlCl3]−, which are generated by dehalodimerization reaction and Lewis acid–base reaction, respectively. The electrolyte exhibits a highly efficient reversible Mg deposition/dissolution, low overpotential of around 250 mV, and good oxidative stability up to 3.5 V after conditioning. The conditioning process that the active [Mg2(μ-Cl)2(DME)4]2+ species transforms into [Mg3(μ3-Cl)(μ2-Cl)2(DME)7]3+ was demonstrated, owing to the irreversible deposition of Al3+ on Mg foil. More importantly, this electrolyte exhibited good compatibility and kinetics for reversible Mg/MgSx redox, resulting in a high specific capacity of 866 mAh g–1 at 200 mA g–1 and high power density of 550 W kg–1. This work offers a new direction for low-cost, non-nucleophilic electrolyte and paves the way to explore high-power Mg/S batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Junsen Zhong,Bingkun Huang,Jianxin Song,Xiaolong Zhang,Lingyu Du,Yanfeng Gao,Wei Liu,Litao Kang
As the best-known and extensively-studied electrochromic material, tungsten trioxide (WO 3 ) has drawn tremendous interest due to its low material cost, environmental benignity, dual band regulation, high optical modulation, and high chemical stability. However, these films always suffer from ion-trapping-induced degradation in electrochromic performance when cycled in alkali cation (such as Li + , Na + , K + , etc.) electrolytes. Herein, we report a stable WO 3 electrochromic system enabled by a NH 4 CF 3 SO 3 -TEP (Triethyl phosphate) organic electrolyte. Based on comparative experiments and systematic characterizations, the prolonged cycling stability is mainly attributed to the formation of hydrogen bonds between the NH 4 + ions and the WO 3 lattice, which are much weaker than metallic coordination bonds. Furthermore, the bulky CF 3 SO 3 − anion and large TEP solvent molecule are also favorable to stabilize WO 3 , since they are more resistive to be co-inserted into the WO 3 lattice along with the shuttling NH 4 + cations. Thanks to these merits, this NH 4 CF 3 SO 3 -TEP electrolyte simultaneously enables great electrochromic activity (76.1 % transmittance modulating ability at 633 nm) and impressive cyclic color-switching stability (1000 times color change without any detectable electrochromic performance or mechanical degradation), overwhelmingly outperforming the conventional Li + /K + electrolytes. Furthermore, as a demonstration of its application, a WO 3 /Zn electrochromic device is fabricated based on a NH 4 + /Zn 2+ -CF 3 SO 3 dual-cation TEP electrolyte. These findings may shed light on the in-depth understanding of WO 3 ′s “ion trapping” effect, as well as the electrolyte design of high-performance WO 3 -based electrochromic devices.
研究领域:
材料科学
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电化学
·
光电
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING COMMUNICATIONS
·
2026
·
IF 2.2
Xiaoxian Sun,Yining Hu,Yingtong Zhou,Xin Liu
An amino acid ionic liquid, with lysine as the cation and CF3SO3- as the anion, was synthesized by ion‐exchange between lysine and trifluoromethanesulfonic acid. This ionic liquid was then explored as a catalyst for the esterification of oleic acid with methanol to produce methyl oleate, commonly known as biodiesel. Using this catalytic ionic liquid helps to mitigate common issues in conventional biodiesel synthesis—such as difficult product separation, catalyst recovery, and waste liquid disposal. This study investigates the effect of the catalyst on the conversion of oleic acid and identifies the optimal reaction conditions, including temperature, methanol-to-oleic-acid molar ratio, catalyst loading, and reaction time. The process was first optimized using traditional single-factor experiments to evaluate the main operating variables. Subsequently, data-driven methods, including Response Surface Methodology (RSM) based on a Box–Behnken design and Random Forest regression modeling, were employed to determine the optimal conditions for maximizing methyl oleate yield. The computational approach served to significantly reduce the required number of experimental trials, and allows to systematically identify optimal reaction conditions. The verified computational results had only 0.17% deviation from the predicted values.
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Zhencai Qu,Chang-an Xu,Zhuorong Hu,Yue Li,Huifa Meng,Zhiyou Tan,Jun Shi,Kun Wu
Owing to its intrinsic structure, thermal stability and dimension effects, black phosphorene (BP) has great potential in manufacturing advanced-performance polymer composites . However, the shortcoming of instability and re-agglomeration enables great challenges toward its application. Herein, a lanthanide metal ligand ((CF 3 SO 3 ) 3 Er) has been employed to decorate few-layer BP nanosheets . By means of density functional theory (DFT), there is a high adsorption energy of −1.49 eV in the system, which confirms a powerful adsorbing effect is existed between BP and (CF 3 SO 3 ) 3 Er . Due to the charge transfer from BP to (CF 3 SO 3 ) 3 Er molecule, the lone-pair electrons of BP are passivated, thereby the decorated BP (Er-BP) exhibits robust stability in ambient conditions and common solvents. Whereafter, the Er-BP is loading into epoxy resin (EP) to manufacture EP-based composites. The Er-BP can not only effectively enhance the dispersion of BP in EP substrate, but also catalyze the curing process of EP nanocomposites . When the amount of Er-BP in epoxy is 3.0 wt%, the residual char content is clearly improved by 75.42%, which is attributed to the coadjutant catalytic charring function between BP and (CF 3 SO 3 ) 3 Er. EP/Er-BP 3.0 sample can meet the requirement of UL-94 V-0 testing, and the limiting oxygen index (LOI) value is improved from 24.7% to 30.3%. Meanwhile, there is a 61.37% reduction in the peak heat release rate (PHRR) and a 36.68% decrease in the total heat release (THR). The smoke production rate (SPR) and total smoke production (TSP) are also decreased by 62.90% and 55.94%, respectively. Particularly, the amount of CO released per second (COP) is dramatically reduced by 74.24%, implying that the heat and smoke release has been significantly suppressed due to the production of protective char layer.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2020
·Vol. 13
·期 9
·2239-2244
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IF 7.962
Yuwen Luo,Feipeng Zheng,Luojia Liu,Kaixiang Lei,Xuesen Hou,Gang Xu,Hui Meng,Jifu Shi,Fujun Li
Graphical Tunable operating voltage : The anion effect induces a varied redox ability of p-type organic radicals, leading to tunable operating voltage of Zn–organic radical batteries. DFT calculations reveal that the stronger interaction of the anion with the organic radical host, the higher the operating voltage of the Zn–organic radical battery. In contrast to traditional rechargeable rock-chair metal-ion batteries, dual-ion batteries (DIBs) involve redox reactions with anions rather than cations in p-type cathodes. In principle, regulating the electrochemical performance of the DIB by different anion species is highly feasible. Herein, the anion effect on the electrochemical performance of a DIB, the aqueous Zn– organic radical battery (Zn-ORB), consisting of a poly(2,2,6,6tetramethylpiperidinyloxy-4-yl vinyl ether) cathode and a Zn anode, was investigated by DFT calculations. SO 4 2− , CF 3 SO 3 − , and ClO 4 − with different molecular electrostatic potential values were selected as anion models. DFT calculations revealed that a stronger electrostatic interaction of the anion with the organic radical resulted in a higher operating voltage of the Zn-ORB, which was consistent with experimental results. These results bring new insight into the redox chemistry of p-type organic radicals with anions and will promote the development of high-power aqueous Zn-ORBs as well as inspire more investigations into the anion effect towards novel battery designs.
研究领域:
电化学
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电池技术
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材料科学
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计算化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）