JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Youshuang Zhou,JianYun Ding,Zhaoyang Wei,Weiwei Lei,Jun You,Qunchao Zhang,Dean Shi
The catalytic effect of zinc sulfide (ZnS) on the transformation of polysulfides (Li 2 S 8 ) to lithium sulfide (Li 2 S) has been proven by the enhancement in the rate performance of lithium-sulfur (Li–S) batteries incorporating ZnS particles into the cathode. Accordingly, the shuttling effect of polysulfide should also be suppressed. However, the expected phenomenon is not found in the Li–S batteries with ZnS particles being added in the cathodes. In order to find the intrinsic mechanism of this phenomenon, detailed catalytic effects of ZnS particles on different polysulfide molecules are investigated. It is shown that ZnS can only enhance the reaction from Li 2 S 4 to Li 2 S and it has almost no catalytic effect on the reaction from Li 2 S 6 to Li 2 S 4 . This is why the shuttle effect of Li 2 S 6 cannot be effectively prohibited. This mechanism is further verified via combining ZnS particles with S–C@PVA yolk-shell particles containing sulfur (S) and carbon black (C) as the core and PVA as the shell. Although the reaction from Li 2 S 6 to Li 2 S 4 cannot be directly catalysed by ZnS particles, it can still be enhanced when ZnS particles are distributed within the S–C@PVA yolk-shell structure (S–C–ZnS@PVA) because the reaction speed from the Li 2 S 4 to Li 2 S is accelerated. The fast consumption of Li 2 S 4 will result in the enhancement of the reaction from Li 2 S 6 to Li 2 S 4 , which will largely reduce the diffusion of Li 2 S 6 out of the PVA shell. While if ZnS particles are located outside the S–C@PVA yolk-shell structure (S–C@PVA-ZnS), large amount of Li 2 S 6 can still diffuse out of the PVA shell and enter into the electrolyte since the transformation from is Li 2 S 6 to Li 2 S 4 relatively low. Both the rate performance and cycle stability of the batteries with S–C–ZnS@PVA cathodes are higher than those with S–C@PVA-ZnS ones. These results will give a guidance for the preparation of Li–S battery with high performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2017
·
IF 5.651
Futao Wang,Yuanfeng Pan,Pingxiong Cai,Tianxiang Guo,Huining Xiao
A high efficient and eco-friendly sugarcane cellulose-based adsorbent was prepared in an attempt to remove Pb 2+ , Cu 2+ and Zn 2+ from aqueous solutions. The effects of initial concentration of heavy metal ions and temperature on the adsorption capacity of the bioadsorbent were investigated. The adsorption isotherms showed that the adsorption of Pb 2+ , Cu 2+ and Zn 2+ followed the Langmuir model and the maximum adsorptions were as high as 558.9, 446.2 and 363.3 mg·g −1 , respectively, in single component system. The binary component system was better described with the competitive Langmuir isotherm model. The three dimensional sorption surface of binary component system demonstrated that the presence of Pb 2+ decreased the sorption of Cu 2+ , but the adsorption amount of other metal ions was not affected. The result from SEM-EDAX revealed that the adsorption of metal ions on bioadsorbent was mainly driven by coordination, ion exchange and electrostatic association.
研究领域:
环境科学
·
生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL RESEARCH
·
2021
·
IF 0.782
Chun-Jing Li
We report a direct cross-coupling reaction between (het)aryl pivalates/tosylates and di(het)arylzinc species in 2-methyltetrahydrofuran/N-methyl pyrrolidone (1:1), which occurs via C–O bond cleavage under microwave irradiation. The reaction takes place smoothly in short reaction times without the addition of any catalyst or ligand. The reaction is suitable for a broad scope of substrates and exhibits good functional group compatibility, utilizes a simple work-up procedure, and gives the desired products in high purity.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
Advanced Powder Materials
·
2022
·
IF 0
Yingzhu Hu,Chunyan Fu,Simin Chai,Qiong He,Yijiang Wang,Mingyang Feng,Yifang Zhang,Anqiang Pan
Aqueous Zn metal batteries have become competitive electrochemical energy storage systems owing to their material abundance, low cost, high capacity, and nontoxicity. Nevertheless, the notorious Zn dendrites and poor anode reversibility caused by the insulating by-products and “dead Zn” are still formidable challenges for their practical application. Herein, an SnS-based layer coated on the Zn anode is reported to tackle these problems. The semiconducting SnS with a higher work function can drive the electrons from the Zn anode, which constructs a polarized interface between the SnS layer and Zn. The semiconducting importance of the coating layer is verified through theoretical simulations, which can migrate the polarization layer from the electrode surface to a well-protected spot beneath the coating layer. This polarization interface is effective in homogenizing the Zn 2+ flux and repelling the anions from electrochemical corrosion. Compared with the bare Zn, the SnS-coated Zn anode exhibits a notable 14.7-fold enhancement in plating/stripping lifetime (over 3000 h), high reversibility (with CE of 99.74%), and superior stability in full cells when paired with vanadium- and manganese-based cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
You Li,Weiming Chen,Shengkun Jia,Mulan Tang,Yuxin Zhai,Lulu Zhan,Weiyan Chen
For practical rechargeable aqueous zinc-ion batteries, the long-term cycling stability of the zinc anode remains significantly constrained by its low utilization efficiency and the persistent challenge of hydrogen evolution . This study demonstrates the fabrication of ultrathin zinc electrodes with a robust Zn (002) texture while ensuring an adequate supply of zinc metal for use as an anode material . This approach effectively suppresses the tendency of zinc atoms to undergo deposition transformation due to dislocation-induced phenomena. Compared to zinc foils with higher deposition amount, the ultrathin Zn anode exhibits enhanced resistance to dendrite growth and interfacial side reactions. Assembled symmetrical cells based on this ultra-thin Zn anode show a cycle life of 1750 h (1 mAcm −2 , 0.5 mAhcm − 2 ), maintaining stable cycling for over 100h even at a high depth of discharge (DOD) of 46.23%. Additionally, the full cell couple with V 10 O 24 exhibits a high initial capacity of 429.6 mAh g −1 and a capacity retention of 75.8% after 1000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2022
·Vol. 62
·期 5
·1641-1649
·
IF 2.573
Hui Fang,Anlin Chen,Lingjie Zhang,Sheng Chen,Fangjuan Wu,Hui Chen
Three-dimensional boron nitride/zinc oxide (3D-BN-ZnO) scaffolds were prepared by the ice-templating method, in which ZnO particles were in situ formed by sintering. Then, polydimethylsiloxane (PDMS)/3D-BN-ZnO composites were fabricated via vacuum infiltration of PDMS prepolymer into the scaffolds and curing. Compared with the composite prepared by simple blending, the thermal conductivity of the composite prepared based on the ice-templating method is much higher due to the excellent orientation of hexagonal boron nitride (hBN) sheets. Based on the same content of hBN sheets, the further introduction of 2.7 wt% ZnO particles formed in situ by sintering could promote the thermal conductivity of the composite to the value of 1.45 W m −1 K −1 , which is 70.6% higher than that of the PDMS/3D-BN composite. In addition, compared with the PDMS/3D-BN composite containing more hBN sheets, the PDMS/3D-BN-ZnO composite with 2.7 wt% ZnO particles possesses fewer fillers but higher thermal conductivity. It suggests that ZnO particles could synergistically improve the thermal conductivity. As revealed from the morphology of the composites, many ZnO particles are located between hBN sheets and thus construct thermally conductive paths. This study provides a new strategy for the design of thermal interface materials with high thermal conductivity.
研究领域:
材料科学
·
热管理技术
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Jinrong Liang,Kejia Wu,Fukun Li,Jinxing Long,Qiang Zeng,Xuehui Li
Catalytic hydrogenolysis of the renewable aromatic polymer of lignin to value-added fine chemicals without external molecular hydrogen is of great significance. In this work, catalytic conversion of lignin with in situ H 2 produced from the aqueous phase reforming (APR) of methanol is studied in the presence of ZnO-modified Pd/AC (Pd-Zn/AC). 259.8 mg g -1 yield of monophenols is obtained when the lignin depolymerization is catalyzed by Pd-Zn/AC-10 in a methanol aqueous solution ( V C H 3 OH / V H 2 O =9/1) at 250 °C for 4 h. Extensive analysis showed that this effective process should be attributed to the synergistic effect between Pd-Zn alloy and the metallic Pd, which promote the H 2 production from the APR of methanol and the hydrogenolysis of lignin, respectively. Moreover, a plausible pathway for selective hydrogenolysis of lignin is proposed based on the comparative characterization of the raw lignin, residual lignin, and the transformation behavior of lignin model compounds.
研究领域:
化学工程
·
可再生资源化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jiguo Tu,Cheng Chang,Mingyong Wang,Wei Guan,Shuqiang Jiao
Compared with the widely developed positive electrodes, the research on the high stability negative electrodes is far from in-depth in nonaqueous Al batteries. In order to fundamentally solve these key problems, including Al dendrites, corrosion and pulverization, it is urgent to develop an alternative stable negative electrode. Herein, the corrosion-resistant, low-voltage-hysteresis and stable Zn is demonstrated as a promising negative electrode. Since the deposited Al particles on the Zn electrode are prior to Zn in the stripping reaction, Zn electrode can remain good structural integrality, thus presenting great cycling stability and corrosion resistance. Importantly, the results in Al-Zn symmetric cells indicate that Zn possesses the ultra-low voltage hysteresis (∼17 mV at 0.5 mA cm −2 ), superior cycling stability (800 cycles at 1.0 mA cm −2 ) and Al plating/stripping reversibility characteristics. Additionally, the Zn-graphite full battery based on Zn as negative electrode and flake graphite as positive electrode delivers stable discharge capacity of 81.1 mAh g −1 over 300 cycles. The results in this work open an effective approach for constructing corrosion-resistant, low-voltage-hysteresis and stable negative electrode, further indicating that Zn is great promising as negative electrode for Al dual-ion batteries.
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
Cong Chen,Minjie Shi,Yue Zhao,Cheng Yang,Liping Zhao,Chao Yan
Although manganese dioxide (MnO 2 ) is of great promise as the cathode material for aqueous Zn-ion batteries (ZIBs), its capacity decreases sharply during cycles due to the irreversible phase transition and Mn dissolution, consequently hindering the large-scale practical application. Herein, for the first time, a novel Al-intercalation engineering of MnO 2 cathode has been proposed for aqueous ZIBs, in which the structural regulation and Zn 2+ storage performance of Al-intercalated MnO 2 (denoted as AMO) cathode are deeply investigated. Electrochemical testing results indicate significant improvement in specific capacity (401.7 mAh g −1 ) and cycling retention (~94.5% over 2000 cycles) of the AMO cathode, which is owing to the effective Al-intercalation that result in the formation of strong Al-O bonds in tunnel-type MnO 2 framework. This reasonable configuration not only optimizes charge/ion state and electronic bandgap, but also ensures reversible phase transition and alleviates the Mn dissolution of AMO cathode, which are further demonstrated by the density functional theory (DFT) calculations and in-situ Raman investigation upon charging-discharging. As a proof of concept, coin-type and flexible aqueous ZIBs based on such AMO cathode are effectively fabricated, and they both achieve excellent electrochemical behaviors, revealing the great potential applications in energy technologies and portable/wearable electronics.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Shuo Xing,Jinli Ma,Fudong Zeng,Liangqiang Wu,Yixuan Yao,Yapeng Li,Jianshi Du,Qingbiao Yang,Yaoxian Li
Zinc is one of the essential trace elements in the human body and plays an extremely important role in physiological processes. Therefore, it is necessary to develop a detection method that can be used for real-time, highly sensitive response of Zn 2+ in organisms and has low toxicity. In this work, a novel fluorescent probe NA for Zn 2+ detection based on 1,8-naphthalene dicarboxylic anhydride and dimethylpyridine amine was synthesized. Probe NA has specific recognition and real-time monitoring functions for Zn 2+ . Based on Job's plotting curve, it is inferred that the coordination ratio between probe NA and Zn 2+ is 3:1, forming a complex of [Zn(NA) 3 ] 2+ . The [Zn(NA) 3 ] 2+ exhibits obvious yellow fluorescence at 550 nm. Probe NA can achieve quantitative detection of Zn 2+ with a detection limit of 7.52 × 10 −9 M, with high selectivity and anti-interference ability. Probe NA can stably exist in a wide pH range (2–10). This indicates that it can detect Zn 2+ in complex environments. In addition, based on the low cytotoxicity, high sensitivity, and real-time monitoring characteristics of probe NA, we have expanded it to real-time monitoring of Zn 2+ in organisms (HUVEC cells and live mice), as well as qualitative and quantitative detection of Zn 2+ concentration in food and drugs.
研究领域:
化学
·
生物学
·
医学
✓ 已验证
DOI
高影响因子
Carbon Neutralization
·
2024
·
IF 0
Longwei Li,Rongrong Li,Shaojie Zhou,Wenjun Xu,Yu Li,Jingmin Zhang,Lei Gao,Xiong Pu
Zinc bromine flow batteries (ZBFBs) are well suited for stationary energy storage due to their attractive features of high energy density and low cost. Nevertheless, the ZBFBs suffer from low power density and limited efficiency owing to the relatively severe polarization of the Br 2 /Br − redox couple. Herein, a three-dimensional (3D) hierarchical composite electrode based on core-shell Ni/NiO heterostructures anchored on graphite felt (Ni/NiO@GF) is designed to promote the kinetics of the Br 2 /Br − couple, so as to improve the power density and efficiency of the ZBFB. In this design, the highly conductive carbon felt and Ni cores provide a composite electrode with a 3D electron transporting framework to guarantee excellent electronic conductivity, while the NiO shells possess great absorption ability to Br 2 and brilliant catalytic activity for the Br 2 /Br − redox reaction to reduce the electrochemical polarization. As a result, an enhanced ZBFB with Ni/NiO@GF electrode shows an outstanding energy efficiency of 86% at 20 mA cm −2 and can be operated at a current density of up to 160 mA cm −2 with a respectable energy efficiency of 67%. These results exhibit a promising strategy to fabricate catalytic electrodes for high-performance ZBFBs.
研究领域:
电化学
·
能源存储
·
材料科学
✓ 已验证
DOI
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2017
·Vol. 410
·期 2
·349-359
·
IF 3.431
Sun Ya Kun,Jia Man,Yang Jian,Huang Yan-Ping,Liu Zhao-Sheng,Aisa Haji Akber
A method of preparing molecularly imprinted polymers (MIPs) with Zn(II) as a metallic pivot was adopted to solve the problem of imprinting compound with intramolecular hydrogen bonds by forming stronger coordination binding interaction among the template–functional monomer-Zn 2+ complex. A ternary porogenic system including dimethyl sulfoxide, dimethylformamide, and room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate was employed to fabricate imprinted monolith with high porosity and good flow-through properties, in which chicoric acid (CA), zinc acetate, 4-vinylpyridine (4-VP), and ethylene glycol dimethacrylate (EDMA) was the template, metallic ion, functional monomer, as well as crosslinker, respectively. The influence of polymerization factors including the 4-VP-CA ratio, monomer-crosslinker ratio, template-Zn 2+ ratio on imprinting factors was systematically investigated. When the ratio of 4-VP to CA was 24:1, the greatest IF value (24.81) was achieved on the CA-MIP prepared with zinc acetate. In addition, off-line SPE with the optimal MIPs monolith led to high purity of CA (98.0% ± 0.5%) from extraction of Cichorium intybus L. roots with the recovery of 77.5% ± 2.5% ( n = 6). As a conclusion, the strategy of introducing metal ions as metal pivot to prepare MIPs was a powerful method for the MIPs synthesis to the template molecules with intramolecular hydrogen bonds.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）