科创中国

The sulfur confined inside the interpenetrating network of compressed nickel foam we prepared and its application as a high-performance S cathode for lithium-sulfur batteries was investigated. The double confine by Ni foam and pencil-plating graphite makes the cathode high performance. The mechanical physical method was applied to prepare the S cathode at room temperature without using binder and conductive additives. The sulfur mass loading was controlled between 0.42 and 3.32 mg/cm² in the cathode piece. The optimized cathode of 0.42 mg/cm² S on Ni foam displayed high initial discharge capacity (1412 mAh/g at 1C), long cycle stability (1014 mAh/g after 100 cycles at 1C, S 1.05 mg/m²), and high rate capability (495 mAh/g at 2C, S 1.15 mg/cm²). This rapid, simple, one-step cathode preparation method may pave a new practical way for mass production of high-performances S cathode materials in lithium-sulfur battery technology.

Xuefeng Li;Shimou Chen;Juntian Fan;Zhongliang Hu;锁江 张

Industrial & Engineering Chemistry Research

2018-4-11

In this paper, the recent research progress of hydrogen sulfide (H₂S) removal using ionic liquids (ILs) is reviewed, mainly focusing on the research around the solubility of H₂S in ionic liquids and the selectivity to other gases, the thermodynamics properties and the corresponding models of H₂S-ILs system. The absorption mechanism is discussed considering the influence of the anion and cation, and the substituent group of ILs on the solubility. Then the development trends and research perspective in this field are given.

Lingdi Cao;Shaojuan Zeng;香平 张;锁江 张

Huagong Xuebao/CIESC Journal

2015-6-1

Potential applications of ILs require the knowledge of the physicochemical properties of ionic liquid (IL) mixtures. In this work, a series of semi-empirical models were developed to predict the density, surface tension, heat capacity and thermal conductivity of IL mixtures. Each semi-empirical model only contains one new characteristic parameter, which can be determined using one experimental data point. In addition, as another effective tool, artificial neural network (ANN) models were also established. The two kinds of models were verified by a total of 2304 experimental data points for binary mixtures of ILs and molecular compounds. The overall average absolute deviations (AARDs) of both the semi-empirical and ANN models are less than 2%. Compared to previously reported models, these new semi-empirical models require fewer adjustable parameters and can be applied in a wider range of applications.

Ying Huang;香平 张;Yongsheng Zhao;Shaojuan Zeng;Haifeng Dong;锁江 张

Physical Chemistry Chemical Physics

2015

Liquid-liquid equilibria data of the [Bmim]BF₄ + fructose + water system were determined at 298.15, 308.15, 31815 K. It was found that the liquid-liquid equilibria can be formed over a wide component range and the effect of the temperature on the phase equilibria is obvious within the fructose concentration changing from 3 to 40%. The binodal curves were correlated using a five-parameter equation, and the tie lines were fitted the Othmer-Tobias and Bancroft correlations. Correlation coefficients for the equations exceeded 0.99.

Yanqiang Zhang;锁江 张;Yuhuan Chen;Jianmin Zhang

Fluid Phase Equilibria

2007-8-25

Trace amounts of ionic liquids have been mixed in sulfuric acid to enhance the catalytic performance for the alkylation of isobutane with butene. The experimental results from batch reactors indicated that the reaction efficiency was significantly improved. The effective catalytic lifetime of concentrated H₂SO₄ mixed with [Bmim][SbF₆] was twice compared with pure H₂SO₄. Under the optimal conditions, the alkylate research octane (RON) reached 98, and the selectivity of C8 was 90%. The ionic liquids with SbF₆ anion worked similar to buffer agents, which were in favor of keeping the acid strength of catalytic system, slowing the growth of acid soluble oil, and reducing acid consumption. In conclusion, the new catalytic system of acid and trace amounts of ionic liquids is very promising to substitute the old catalytic system of concentrated H₂SO₄ alone for the alkylation.

Qian Huang;Guoying Zhao;锁江 张;Feifei Yang

Industrial & Engineering Chemistry Research

2015-2-11

To design task-specific ionic liquids (TSILs) for capturing CO ₂, the frontier molecular orbital interactions between CO ₂ and -NH₂ in TSILs, such as 1,1,3,3-tetramethylguanidinium lactate and 1-n-propylamine-3-butylimidazolium tetrafluoroborate, were systematically studied by employing B3LYP/6-31G** calculations. A detailed frontier molecular orbital study showed that the inherent intramolecular hydrogen bonds in TSILs and the electron-donating groups attaching to -NHa could raise the frontier occupied molecular orbital energy on -NH2 and thus enhance the interactions between -NH₂ and CO₂. Following the underlying interaction mechanism between CO₂ and -NH₂ in TSILs, two new TSILs, [P(C₄)₄][Ala] and [P(C₄)₄][Gly], were designed and the interactions between CO₂ and -NH₂ in such ionic liquids were investigated. This work showed a good prospect to design TSILs for selectively capturing CO₂ from gas streams by applying the molecular orbital calculations.

光认 于;锁江 张;Xiaoqian Yao;Jianmin Zhang;Kun Dong;Wenbin Dai;Ryohei Mori

Industrial & Engineering Chemistry Research

2006-4-12

The mechanism of CO₂ fixation catalyzed by protic hydroxyl-functionalized quaternary ammonium ionic liquids (ILs) is investigated by two different models, the Single-IL model and the Double-IL model. The relative sequence of catalytic activity calculated by the Single-IL model is contradictory with the experimental result. The situation is totally varied when the Double-IL model is utilized. In this system, ILs are not limited to the catalyst but solvent. The ILs are incorporated into the catalytic system to consider the solvent effect rather than by the existing solvent model. When the solvent effect is included, it is better to distinguish the catalytic activity of three ILs. According to the noncovalent interaction and the atoms in molecules analysis, the highest catalytic activity of tris(2-hydroxyethyl)ammonium bromide ([HTEA]Br) is attributed to its strongest nucleophilic attack and moderate hydrogen bond interaction between IL and reactant. It is necessary to consider the interaction between ILs to get a reliable result. Moreover, the solvent effect aroused by ILs should be carefully considered. ©

Huiqing Yang;Danning Zheng;Jingshun Zhang;Ke Chen;Junfeng Li;Li Wang;Jinglai Zhang;Hongyan He;锁江 张

Industrial & Engineering Chemistry Research

2018-5-30

The first bimagnetic ionic liquid based on Fe and TEMPO with cooperative functionalities not only exhibited strong paramagnetic behaviour at room temperature under an applied magnetic field of 5000 Oe but also proved to be an effective catalyst for selective aerobic oxidation of aromatic alcohols under mild and clean conditions.

Cheng Xia Maio;Jin Quan Wang;Bing Yu;Wei Guo Cheng;Jian Sun;Sébastien Chanfreau;Liang Nian He;锁江 张

Chemical Communications

2011-2-14

A protocol for the cobalt-catalyzed oxidative esterification of allylic/benzylic C(sp³)–H bonds with carboxylic acids was developed in this work. Mechanistic studies revealed that C(sp³)–H bond activation in the hydrocarbon was the turnover-limiting step and the in-situ formed [Co(III)]Ot-Bu did not engage in hydrogen atom abstraction (HAA) of a C–H bond. This protocol was successfully incorporated into a synthetic pathway to β-damascenone that avoided the use of NBS.

Tian Lu Ren;Bao Hua Xu;Sajid Mahmood;Ming Xue Sun;锁江 张

Tetrahedron

2017

Lithium metal batteries (LMB) are one of the most attractive candidates for next generation high energy density devices owing to the high specific capacity (3860 mA h g-1) and low electrochemical potential (-3.04 V vs. standard hydrogen electrode) of the lithium metal anode. However, a series of problems, especially lithium dendrite growth, hinder its commercial application and these issues are more prominent under extreme conditions. In this work, a novel nanostructured macromolecular lithium salt (LiMS) electrolyte additive, polyethylene glycol (PEG) tethered to partially lithiated SiO2 nanoparticles, is designed and synthesized. This organic-inorganic hybrid nanosized additive can not only serve as a flexible physical barrier between the Li/electrolyte interphase and provide extra Li+, but also absorb HF through some of its functional groups, thereby reducing the parasitic reactions that take place at high temperatures. Facilitated by the nanoscale protective layer formed by the LiMS additive, the Li‖Li4Ti5O12 battery demonstrates outstanding electrochemical performance within the wide temperature range of -20 to 60 °C. More than 70% of its theoretical capacity is delivered at -20 °C and 0.5C rate; 80.23% capacity is retained after 200 cycles under a critical condition of 5C and 60 °C. Moreover, the LiMS additive also improves the compatibility between the electrolyte and LiNi0.8Co0.1Mn0.1O2, thus demonstrating its potential for wide applications.

Mengmin Jia;Yawei Guo;Haiyan Bian;Qipeng Zhang;Lan Zhang;锁江 张

Journal of Materials Chemistry A

2020-12-7