Nanomaterials
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2022
·Vol. 12
·期 17
·2994
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IF 5.719
Daojun Zhang,Bei Jiang,Chengxiang Li,Hao Bian,Yang Liu,Yingping Bu,Renchun Zhang,Jingchao Zhang
Electrochemical energy storage devices (EESDs) have caused widespread concern, ascribed to the increasing depletion of traditional fossil energy and environmental pollution. In recent years, nickel cobalt bimetallic sulfides have been regarded as the most attractive electrode materials for super-performance EESDs due to their relatively low cost and multiple electrochemical reaction sites. In this work, NiCo-bimetallic sulfide NixCo3−xS4particles were synthesized in a mixed solvent system with different proportion of Ni and Co salts added. In order to improve the electrochemical performance of optimized Ni2.5Co0.5S4electrode, the Ni2.5Co0.5S4particles were annealed at 350 °C for 60 min (denoted as Ni2.5Co0.5S4-350), and the capacity and rate performance of Ni2.5Co0.5S4-350 was greatly improved. An aqueous NiCo-Zn battery was assembled by utilizing Ni2.5Co0.5S4-350 pressed onto Ni form as cathode and commercial Zn sheet as anode. The NiCo-Zn battery based on Ni2.5Co0.5S4-350 cathode electrode delivers a high specific capacity of 232 mAh g−1at 1 A g−1and satisfactory cycling performance (65% capacity retention after 1000 repeated cycles at 8 A g−1). The as-assembled NiCo-Zn battery deliver a high specific energy of 394.6 Wh kg−1and long-term cycling ability. The results suggest that Ni2.5Co0.5S4-350 electrode has possible applications in the field of alkaline aqueous rechargeable electrochemical energy storage devices for supercapacitor and NiCo-Zn battery.Keywords:NixCo3−xS4structures;micro/nanostructures;supercapacitors;Ni-Zn batteries
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CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
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2022
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IF 0.847
Zhao-Di Zhou,Zi-Long Xu,Dan Wang,Lin-Fang Jia,Han-Qing Zhao,Bao-Yi Yu,Chong-Chen Wang
Two coordination polymers (CPs) [Zn(PTA)(DTP)(H 2 O) 2 ]•(DMF) ( CP-1 ) and [Zn(BTC)(DTP)]•(CH 3 CN) 1.5 •(H 2 O) 4 ( CP-2 ) with one- and two-dimensional architectures were synthesized from Zn(II) ion and different organic linkers like terephthalic acid (H 2 PTA), benzene-1,3,5-tricarboxylic acid (H 3 BTC), and 3,5-di(1,2,4-triazol-1-yl) pyridine (DTP). The fluorescent sensing experiments showed that the two CPs displayed effective, sensitive, and selective abilities towards Fe 3+ and Cr 2 O 7 2- . For sensing the pesticides, CP-1 outperforms in sensing of metamitron (MMT) and CP-2 is ultrasensitive towards imidacloprid (IMI). The possible mechanisms involved in the quenching of the fluorescence intensity include the inner filter effect (IFE) and the fluorescence resonance energy transfer (FRET) effect.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhongxu Li,Xueer Xu,Zhao Jiang,Jiayi Chen,Jiangping Tu,Xiuli Wang,Changdong Gu
A eutectogel (ETG) based on immobilizing a zinc salt deep eutectic solvent (DES) in a silk protein backbone is prepared by a coagulating bath method as a solid electrolyte for Zn-ion hybrid supercapacitors (ZHSCs). The Zn salt DES is composed by ethylene glycol (EG), urea, choline chloride (ChCl), and zinc chloride (ZnCl2) with a molar ratio of 6:10:3:3. A strong bonding of the DES liquid to the silk protein backbone is formed between protein macromolecules and the DES due to plenty of hydrogen bonds in both materials. The as-prepared ETG membrane is dense and has no obvious void defects, which possesses a fracture strength of 7.58 MPa and environmental stability. As a solid electrolyte, the ETG membrane exhibits a higher Zn2+ transference number of about 0.60 and a high ionic conductivity (12.31 mS cm–1 at room temperature and 3.63 mS cm–1 at −20 °C). A ZHSC (Zn∥ETG∥C) with the silk protein-based ETG electrolyte is assembled by Zn and active carbon as the anode and the cathode, respectively, which delivers a specific capacitance of 342.8 F g–1 at a current density of 0.2 A g–1 and maintains excellent cycling stability with 80% capacitance retention after 20,000 cycles at a high current rate (5 A g–1) at room temperature. Moreover, the Zn∥ETG∥C device can safely work under a lower temperature of about −18 °C and damaging situations, such as folding states and even cutting tests. The interface evolutions between the Zn anode and the ETG electrolyte are explored, and it was found that a ZnCO3/Zn(CH2OCO2)2 solid electrolyte interphase is in situ formed on the Zn anode, which can inhibit the growth of Zn dendrites. This work provides a new way to fabricate advanced electrolytes for applications in Zn-ion hybrid supercapacitors.
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Materials Today Chemistry
·
2021
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IF 8.301
H.J. Gao,S.F. Wang,L.M. Fang,G.A. Sun,X.P. Chen,S.N. Tang,H. Yang,G.Z. Sun,D.F. Li
Nanostructured spinel-type M(M = Mg, Co, Zn)Cr 2 O 4 oxides with novel adsorbents for aqueous Congo red removal were synthesized by a polyacrylamide gel method and studied for their phase structure, microstructure, adsorption performance, and multiferroic behavior. The phase structure and purity analysis revealed that the nanostructured spinel-type M(M = Mg, Co, Zn)Cr 2 O 4 oxides presented a spinel-type cubic structure, and the formation of a secondary phase such as Cr 2 O 3 , MgO , ZnO, or Co 3 O 4 was not observed. The microstructure characterization confirmed that the spinel-type MCr 2 O 4 oxides grew from fine spherical particles to large rhomboid particles. Adsorption experiments of spinel-type MCr 2 O 4 oxides for adsorption of Congo red dye were fitted well with the pseudo-second-order kinetics. The adsorption capacity of the ZnCr 2 O 4 oxide (44.038 mg/g, pH 7, temperature 28 °C, initial dye concentration 30 mg/L) was found to be higher than that of MgCr 2 O 4 oxide (43.592 mg/g, pH 7, temperature 28 °C) and CoCr 2 O 4 oxide (28.718 mg/g, pH 7, temperature 28 °C). The effects of initial adsorbent concentration, initial dye concentration, pH, and temperature between the ZnCr 2 O 4 oxide and Congo red dye at which optimal removal occurs, were performed. The thermodynamic studies confirmed that a high temperature favors the adsorption of Congo red dye onto ZnCr 2 O 4 oxide studied. The nanostructured spinel-type M(M = Mg, Co, Zn)Cr 2 O 4 oxides that exhibited high adsorption performance for adsorption of Congo red dye can be ascribed to the synergistic effect of electrostatic interaction , pore filling, and ion exchange. The present work suggested that the nanostructured spinel-type M(M = Mg, Co, Zn)Cr 2 O 4 oxides have excellent adsorption performance and multiferroic behavior, which shows potential applications for removal of the Congo red dye from wastewater, magnetic memory recording media, magnetic sensor, energy collection and conversion device, and read/write memory.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2021
·Vol. 168
·期 9
·090514
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IF 4.316
Xiaochao Liu,Siyuan Peng,Xiaoxiao Li,Chao Liu,Jinming Zeng,Xiaopeng Qi,Tongxiang Liang
The development of low-cost, high catalytic activity oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts is the key to promoting the development of zinc-air batteries. In this paper, a simple one-step pyrolysis method was used to successfully synthesize a binary FeCo–Co/NC catalyst with FeCo and Co nanoparticles encapsulated in N-doped carbon nanotubes. This structure exhibits great characteristics: it has a variety of active species (FeCo, Co, NC), and there is close combination between these active species (FeCo, Co, NC). Electrochemical studies have shown that the initial potential of FeCo–Co/NC during ORR process is 0.93 V, the half-wave potential is 0.808 V, and the limiting current density is 4.94 mA cm−2. In the OER process, at an anode current density of 10 mA cm−2, an overpotential of only 353 mV is shown; a lower Tafel slope and good durability are also observed. Moreover, the zinc-air battery in preparation can be cycled for as long as 2000 times. This provides a new method for the preparation of high-efficiency dual-function electrocatalysts for OER and ORR.
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ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 49
·2107652
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IF 18.808
Yiding Jiao,Fangyan Li,Xin Jin,Qingsong Lei,Luhe Li,Lie Wang,Tingting Ye,Er He,Jiacheng Wang,Hao Chen,Jiang Lu,Rui Gao,Qianming Li,Chang Jiang,Jianwei Li,Guanjie He,Meng Liao,Huigang Zhang,Ivan P. Parkin,Huisheng Peng,Ye Zhang
Zinc (Zn) metal is considered the promising anode for “post-lithium” energy storage due to its high volumetric capacity, low redox potential, abundant reserve, and low cost. However, extravagant Zn is required in present Zn batteries, featuring low Zn utilization rate and device-scale energy/power densities far below theoretical values. The limited reversibility of Zn metal is attributed to the spontaneous parasitic reactions of Zn with aqueous electrolytes, that is, corrosion with water, passive by-product formation, and dendrite growth. Here, a new ion-selective polymer glue coated on Zn anode is designed, isolating the Zn anode from the electrolyte by blocking water diffusion while allowing rapid Zn 2+ ion migration and facilitating uniform electrodeposition. Hence, a record-high Zn utilization of 90% is realized for 1000 h at high current densities, in sharp contrast to much poorer cyclability (usually < 200 h) at lower Zn utilization (50–85%) reported to date. When matched with the vanadium-based cathode, the resulting Zn-ion battery exhibited an ultrahigh device-scale energy density of 228 Wh kg −1 , comparable to commercial lithium-ion batteries.
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Ya-yun Li,Qiuming Zou,Zhangjian Li,Dong Xie,Yuan Niu,Jizhao Zou,Xierong Zeng,Junfeng Huang
Bimetallic electrocatalysers have attracted dramatic attentions in recent years owing to their unique electronic configuration, charge transfer efficiency and synergistic effect. Ni-Fe based alloys are considerable as one of the most promising materials with superior electrocatalytic performance since the outstanding oxygen reaction activity of iron and the strong capability of nickel. Herein, Ni-Fe MOF derived Ni-Fe alloys embedded graphitic carbon electrocatalyst is synthesized as bifunctional oxygen electrocatalyst with hierarchical porous structure and superior oxygen reaction electrocatalytic performance. The onset potential and the half-wave potential of Ni 0.6 Fe 0.4 CM in oxygen reaction are 0.88 V and 0.75 V, respectively, which are superior than those of commercial Pt/C. Furthermore, a low overpotential of 320 mV at 10 mA/ cm 2 is obtained in oxygen evolution reaction, which is well consistent with that of commercial RuO 2 . In the meantime, excellent long-term stability and anti-methanol ability endow Ni 0.6 Fe 0.4 CM exhibiting brilliant electrocatalytic performance as commercial Pt/C and RuO 2 . The assembled Zn-air battery exhibits smaller voltage gap (0.76 V) than that for commercial Pt/C and RuO 2 , and it has remarkable stability around 170 cycles in the discharge–charge test. These results summarize the merits of bimetallic electrocatalysers for bifunction electrochemical performance and promote the development of electrocatalytic applications.
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DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 16
·5617-5623
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IF 4.39
Dandan Wang,Xinyuan Zhang,Fei Liang,Zhanggui Hu,Yicheng Wu
Birefringent crystals can modulate and detect the polarization of light, and have been widely used in the field of optoelectronic devices. The combination of a d10 transition metal cation and π-conjugated (H2C3N3O3)− group is a feasible approach for the synthesis of new crystal structures possessing large birefringence and short cutoff edges. Herein, a new hydroisocyanurate birefringent material Zn(H2C3N3O3)2·3H2O (ZHCY) was synthesized by a mild hydrothermal method. ZHCY featured a 2D layered ribbon structure constituted by coplanar π-conjugated (H2C3N3O3)− hydroisocyanurates, and displayed a wide band gap (5.24 eV) and a large birefringence (Δnexp ∼ 0.323, Δncal = 0.283 at 800 nm). Theoretical calculations revealed that its optical properties mainly originated from the π-conjugate coplanar (H2C3N3O3)− groups, which contribute to the enhancement of birefringence.
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Nano Energy
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2021
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IF 17.881
Mengdie Yan,Chenlu Xu,Yang Sun,Huilin Pan,Hong Li
The reaction kinetics, reversibility and long-term stability of Zn anodes are crucial for rechargeable aqueous Zn batteries . Polymer electrolyte additives are low cost and effective to modify the deposition behavior of Zn anodes. Here, an interesting phenomenon appears that cycling stability and Coulombic efficiency of Zn anodes are improved by PEO additive in dilute aqueous electrolytes with different Zn salts, while the overpotential and long-term stability of Zn anodes vary significantly with different anions. Systematic electrochemical analysis coupled with NMR and MD simulation was performed to reveal the crucial role of salt anion in tuning the specific solvation structures and hydrogen bonding network of aqueous electrolytes with PEO additive, and interfacial double layer capacitance structures. The reaction kinetics and stability of Zn anodes were, therefore, intensively tuned by salt anions in aqueous electrolytes with PEO additives. The cycle life of Zn anode can be improved by 7–10 times with significantly reduced overpotential in bulky anion such as TFSI - based aqueous electrolyte than compact anion such as SO 4 2- in PEO containing aqueous electrolytes. This work provides useful and low-cost concepts to effectively improve Zn anodes reaction dynamics and cycle life by choosing optimal electrolyte salts and additives.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
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IF 6.155
Kun Wang,Xian Tong,Jixing Lin,Aiping Wei,Yuncang Li,Matthew Dargusch,Cuie Wen
Zinc (Zn) and its biocompatible and biodegradable alloys have substantial potential for use in orthopedic implants. Nevertheless, pure Zn with a hexagonal close-packed crystal structure has only two independent slip systems, therefore exhibiting extremely low elongation and yield strength in its as-cast condition, which restricts its clinical applications. In this study, as-cast Zn–xTi (titanium) (x = 0.05, 0.10, 0.20, and 0.30 wt.%) binary alloys were hot-rolled and their microstructures, mechanical properties , wear resistance, and cytocompatibility were comprehensively investigated for orthopedic implant applications. The microstructures of both as-cast and hot-rolled Zn–xTi alloys consisted of an α-Zn matrix phase and a TiZn 16 phase, while Zn–0.2Ti and Zn–0.3Ti exhibited a finer α-Zn phase due to the grain-refining effect of Ti. The hot-rolled Zn–0.2Ti alloy exhibited the highest yield strength (144.5 MPa), ultimate strength (218.7 MPa), and elongation (54.2%) among all the Zn–xTi alloys. The corrosion resistance of Zn–xTi alloys in Hanks’ solution decreased with increasing addition of Ti, and the hot-rolled Zn–0.3Ti alloy exhibited the highest corrosion rates of 432 μm/y as measured by electrochemical testing and 57.9 μm/y as measured by immersion testing. The as-cast Zn–xTi alloys showed lower wear losses than their hot-rolled counterparts. The extracts of hot-rolled Zn–xTi alloys at concentrations of ≤ 25% showed no cytotoxicity to MG-63 osteosarcoma cells and the extracts of Zn–xTi alloys exhibited enhanced cytocompatibility with increasing Ti content.
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CARBON
·
2020
·
IF 8.821
Changgan Lai,Xianbin Liu,Changqing Cao,Ying Wang,Yanhong Yin,Tongxiang Liang,Dionysios D. Dionysiou
The development of highly active, inexpensive, and stable bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalysts to replace noble metal Pt and RuO 2 catalysts remains a considerable challenge for highly demanded reversible fuel cells and metal-air batteries . Herein, a novel nitrogen doped carbon nanocage (N–CNC-900) is fabricated via facile carbonization of bimetal-organic framework (BMOF). The newly obtained N–CNC-900 catalyst is featured by multiple carbon layers with a wide lattice spacing of 0.434 nm and the aperture of approximate 10 nm, ultrahigh specific surface area and abundant N doping amount as well. As results, the optimized N–CNC-900 exhibits a low overpotential of 1.52 V toward OER at a current density of 10 mA/cm 2 , and also show a large half-wave potential of 0.90 V for ORR, respectively. High activity and stability toward the bifunctional oxygen electrocatalysis are also demonstrated on the N–CNC-900. When explored as air cathode for rechargeable Zn-air battery, a high open-circuit voltage (1.54 V) and long-term stability (after cycling 200 h) can be realized, outperforming the commercial Pt/C + RuO 2 association. This outstanding performance can be attributed to improved reaction kinetics of both ORR and OER, which originates from the enlarged lattice spacing in the few-layer conductive carbon nanocage structure and the existing metal-nitrogen-carbon (M-N x -C). These results forebode the optimized N–CNC-900 presenting a promising application in metal-air batteries, as well the lattice modulation of carbon materials providing a novel approach for designing advanced electrocatalysts .
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CERAMICS INTERNATIONAL
·
2020
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IF 3.83
Ningyu Chen,Jintang Zhou,Zhengjun Yao,Yiming Lei,Ruiyang Tan,Yuxin Zuo,Wenjian Zheng,Zibao Jiao
The electromagnetic materials are featured by good magnetic permeability and dielectric constant characteristics, which are of significant importance in solving the pollution problem of electromagnetic. In this study, after the complete of the use of sol-gel method, argon gas was then introduced for calcination , and eventually a new type of MWCNTs/Ni 0.5 Zn 0.5 Nd 0.04 Fe 1.96 O 4 composites was synthesized after the above mentioned procedures. The synthesized MWCNTs were able to be adsorbed on the surface of Ni 0.5 Zn 0.5 Nd 0.04 Fe 1.96 O 4 and could form a good conductive work of 3D. Also, the effect of additional MWCNTs on microwave absorption properties of MWCNTs/Ni 0.5 Zn 0.5 Nd 0.04 Fe 1.96 O 4 composites were also observed in this study. The results indicate that the additional MWCNTs function to significantly improve the microwave absorption property of MWCNTs/Ni 0.5 Zn 0.5 Nd 0.04 Fe 1.96 O 4 . Through altering the amount of MWCNTs, the microwave attenuation performance and impedance matching coefficient of this electromagnetic materials can be effectively improved. The S2 sample presented a minimum reflection loss of −35.05 dB when its thickness reached 1.6 mm, meanwhile, the effective absorption bandwidth achieved 4.55 GHz. The prepared composites perform well in microwave absorption, which can attribute to the reasonable ratio of composites as well as its interaction with both of the magnetic and dielectric components. This research paved the way for novel ideas to be put in the electromagnetic absorption materials with high-efficient.
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危险品化学品经营许可证（带存储）