INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
·
IF 3.8
Maijun Li,Yubo Long,Zhibo Zheng,Xu Hu,Siwei Liu,Zhenguo Chi,Nanwen Li,Jiarui Xu,Yi Zhang
Chemical modification of polyimide membranes is employed to achieve “trade-off” breakthrough or improve the plasticization resistance in CO2 separation. However, harsh reaction conditions restrict the application of traditional chemical modifications. In this work, a simple chemical modification method─the coordination cross-linking between hydroxyl groups on polyimide (6FSPI) and Zn(II)─was investigated. Because of the reversible complexation of Zn(II) in the modified membrane as a transport carrier with CO2, and the addition of Zn(II) disrupts coiled chain of spiro moiety or intrachain cross-linking to induce more quantities of ultrafine micropores, the CO2 permeability coefficient of the modified membrane is 2.97 times that of the pristine 6FSPI. Simultaneously, there is improvement in diffusion selectivity of the modified membrane, resulting in the CO2/CH4 selectivity improvement. The overall CO2/CH4 separation performance of the modified membrane reaches up to the 2008 Robeson limit. In addition to serving as facilitated transport carriers, Zn(II) can also be used as cross-linking points. The modified membrane maintains a stable CO2 permeability coefficient beyond 4000 kPa. Our work suggests that the Zn(II) coordination cross-linking is a facile chemical modification method that can enhance long-term performance and separation performance of polyimide membranes simultaneously.
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Advanced Energy Materials
·
2024
·
IF 24.4
Ying Zheng,Xiaolin Xie,Hiroshi Ueno,Ting Deng,Weitao Zheng
Anion intercalation in graphite is deemed as a promising electrode chemistry in aqueous energy storage systems due to its high onset potential. Given the limited space in graphite, multivalent anions are favorable to achieve high specific capacity. However, relevant studies are scarce so that fundamental understandings of multivalent anion intercalation remain unclear. Herein, the intercalation behaviors of ClO 4 − , SO 4 2− , and PO 4 3− in graphite are systematically investigated. High capacity and interaction between anion and graphite are proved to be contradictory as the electric charge increases. As a result, ClO 4 − and SO 4 2− intercalation exhibits promising performance in primitive graphite, while PO 4 3− intercalation is much restricted due to the intensified electronic interaction. Two Zn–graphite dual-ion batteries based on ClO 4 − and SO 4 2− intercalations display high voltages of 1.85 V, and specific energies of 106 and 112 Wh kg −1 . This work provides fundamental understandings of multivalent anion intercalation and guidance to fabricate aqueous batteries (ABs) with high energy density.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yizhan Wang,Yunhui Shi,Jiawei Qiu,JiaBao Cheng,Yao Xu,Yongxin Wang
The intercalation of organic molecules is a promising approach to modulate the structure of 2D transition metal borides (MBenes), aiming to enhance charge transport and improve electrochemical performance in energy storage applications. However, key questions remain regarding how organic molecules with diverse functionalities penetrate and align between the MBene layer, as well as the mechanism of charge redistribution during intercalation. Addressing these questions is crucial for guiding the design of Organic-MBene heterostructures. To this end, a comprehensive approach combining theoretical calculations and experimental analyses was employed to explore the self-assembly mechanisms of organic molecules featuring N, O, S and tertiary amine end groups on the MoB-MBene surface. Experimental characterizations confirm that the interaction between MoB and organic compounds depends on the end groups. First principles calculations demonstrate that organic molecules tend to adopt a flat configuration on the MoB surface during molecular assembly. Calculations also reveal that the binding and charge transfer processes from organic molecules to MoB are highly dependent on the specific end groups, consistent with experimental observations. Furthermore, the effect of combining organic molecules with MoB on battery performance was further discussed, offering new insights for advancing the research and development of MBenes in aqueous battery systems.
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JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Jiwei Xie,Zhenggang Jia,Mingfang Qian,Hsu-Sheng Tsai,Congyan Bai,Xuexi Zhang
Stable Zn anodes with high coulombic efficiency is important for the development of safe, low-cost and environmentally friendly aqueous zinc-ion batteries (AZIBs). However, the performance of Zn anode in AZIBs is deteriorated by its dendrite growth, the corrosion caused by irreversible hydrogen precipitation, and the side reactions occurring during the charge-discharge process. The coating of protective layers on Zn anodes is one of the feasible strategies to overcome these drawbacks. Herein, we coated the chemically stable graphite-phase carbon nitride (g-C 3 N 4 ) nanosheets on Zn anodes and well overcome its aggregation to create a homogeneous g-C 3 N 4 layer. This g-C 3 N 4 layer possesses a porous structure and abundant active sites favoring the homogeneous deposition of Zn. At the current density of 5 mA cm −2 , the g-C 3 N 4 @Zn electrodes provide an ultra-long cycle life over 1300 h. The full-cells assembled with MnO 2 also exhibit excellent discharge capability and capacity retention. This study advances the application of carbon-related nanomaterials as protective coating layers for Zn anodes, which may further facilitate the exploitation on aqueous energy storage systems.
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ACS Applied Polymer Materials
·
2025
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IF 4.7
Hua Chen,Pengda Fang,Mingchen Yang,Jiangtao Yu,Xinyu Ma,Yin Hu,Feng Yan
Rechargeable electrochromic Zn-ion batteries (RZEBs) which combine electrochromic properties with energy storage capabilities, represent a promising development in the field of transparent batteries. The aqueous electrolytes are crucial for enhancing the kinetics and capacity of the cathode in RZEBs. However, the Zn anode suffers from hydrogen evolution reaction (HER), dendrite growth, and formation of byproducts due to excess water. Herein, we designed an integrated Janus gel electrolyte by incorporating a propylene carbonate-based organogel with a hydrogel electrolyte. The Janus gel electrolyte not only facilitates efficient Zn insertion in the cathode with short self-coloring time and good cyclic stability but also effectively mitigates water-induced corrosion in the Zn anode. Specifically, the Zn//Cu batteries exhibit a high Coulombic efficiency of 97.91%. Furthermore, the Zn//WO3 batteries exhibit a specific capacity of 43.64 mA h g–1 with a capacity retention of 60.84% after 160 cycles. This work provides an effective electrolyte design that significantly enhances the cycle stability of RZEBs.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 7
·1-7
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IF 2.5
Xing Zhuo,Song Julong,Pan Hong,Wang Juan
A series of CaMgGe 2 O 6 ceramics doped with Zn 2+ ions were designed and fabricated using the solid-state reaction method. The impact of cation doping on sintering behavior, crystal structure, microstructure, and dielectric properties was systematically investigated. Incorporating Zn 2+ ions into the crystal structure optimized the sintering process to enhance densification. Analysis of the crystal structure revealed slight changes in lattice parameters and unit cell volume upon introduction of Zn 2+ dopants, indicating successful incorporation without significant alteration to the overall structure. Microstructural characterization revealed that increasing Zn 2+ content resulted in a finer microstructure with a more uniform grain size distribution. Furthermore, substitution of Zn 2+ effectively reduced dielectric loss in CaMgGe 2 O 6 ceramics while maintaining a stable dielectric constant, making them suitable for high-frequency applications. Among all compositions tested, CaMg 0.8 Zn 0.2 Ge 2 O 6 exhibited exceptional performance with a Q × f value reaching 64,980 GHz along with an ε r of 7.88 and τ f of -36.9 ppm/°C.
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Journal of Materials Chemistry C
·
2025
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IF 5.1
Tianbao Liu,Weixuan Zhao,Shenhua Meng,Biao Dong,Nan Shi,Weiguang Shi
Tetracycline (TC) contributes to the spread of antibiotic resistance, leading to ecological imbalances and negative environmental impacts. Achieving multifunctional applications that allow for specific recognition and in-situ degradation of tetracycline simultaneously remains a significant challenge. This study developed a series of metal-doped carbon dots, specifically zinc-doped carbon dots (Zn-CDs). The incorporation of zinc and the preservation of oxygen-containing functional groups enhance the crystallinity of the Zn-CDs' carbon core and optimize their band gap for improved light luminescence, thereby increasing the quantum yield from 14.7% to 28.6%. Moreover, Zn-CDs demonstrate precise detection of TC in complex pollutant mixtures, achieving a detection limit as low as 25 nM. The mechanism comprises the internal filtering effect attributed to spectral overlap and the electron transfer subsequent to the chelation of zinc in Zn-CDs and carbonyl oxygen in tetracycline. Due to the combination of Zn-CDs with tetracycline that brings a shorter reaction distance and the introduction of zinc that offers more active sites for the generation of free radicals, the degradation reaction likelihood is augmented. The Fenton-like and photocatalytic degradation efficiencies of Zn-CDs were raised over three times, reaching a degradation rate of TC up to 95% and showing excellent stability over five cycles. And the main degradation pathways were respectively driven by hydroxyl radicals and superoxide radicals. Thus, this research provides novel perspectives and examples for constructing multifunctional carbon dots via the metal doping method to effectively tackle environmental pollution.
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ACS Applied Energy Materials
·
2024
·
IF 5.4
Xia Wei,Tianyao Wang,Hongbin Dai,Song Li
The hydrazine oxidation reaction (HzOR) is critical for direct hydrazine fuel cells and presents a promising alternative to the kinetics-sluggish oxygen evolution reaction in water splitting. Engineering catalysts with high-density nanotwin structures has emerged as a compelling strategy to enhance catalytic activity. However, such catalysts have to be explored for HzOR applications. This work reports the successful synthesis of a porous Ni–Zn catalyst featuring high-density coherent nanotwins (NT-Ni-Zn). NT-Ni-Zn supported on Ni foam exhibited exceptionally high catalytic activity and stability toward the HzOR, achieving a current density of 212.4 mA·cm–2 at 0.04 V vs reversible hydrogen electrode and retaining up to 93.9% after 15 h of continuous electrolysis. In addition, hydrazine-assisted water electrolysis using NT-Ni-Zn/Ni foam as both the cathode and anode require only a cell voltage of 70 mV to reach 10 mA cm–2. The exceptional HzOR activity of the Ni–Zn catalyst is attributed to the presence of the nanotwin structure, which promotes a favorable d-band center position and facilitates strong hydrazine binding on the twinned surface. This study provides valuable insights into the development of nanotwin catalysts for HzOR advancement.
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ACS Nano
·
2024
·
IF 15.8
Xiaoming Fan,Yanchun Xie,Yucong Jiao,Peiyi Wu
Flexible Zn-air batteries (FZABs) hold significant promise in diverse application scenarios with high safety and compatibility yet are still impeded by byproduct formation and poor water retention. Here, the neutral hydrogel electrolyte GAHE is engineered by in situ polymerizing acrylamide (AM) in a solution composed of cationic guar gum (CGG) and acetate salts to conquer the above challenges. The acetate anions (OAc–) exert a pH near 7 to effectively inhibit the side reactions triggered by H+. Meanwhile, the monodentate OAc– ions in LiOAc have fast ion diffusion kinetics and form hydrogen bonds between the released carbonyl groups and H2O to further suppress water activity for great side reaction prevention and water retention. Additionally, the in situ polymerization strategy realizes a polymer with high mechanical properties and great electrochemical interfacial stability and further improves the water retention property with hydrophilic groups. Consequently, GAHE gives the FZABs a lifespan of 2050 h at room temperature and 2940 h at −35 °C. This work provides concepts for electrolyte design for water retention and side reaction inhibition properties of aqueous devices.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Wenping Zeng,Xudong Wang,Yun Huang,Yunhe Zhang,He Zheng,Jie Xiao,Lei Fu,Xichang Wang,Xing Li,Mingshan Wang,Bingshu Guo,Yuanhua Lin
The growth of dendritic dendrites and side reactions at the zinc anode result in poor cycling stability of the aqueous zinc-ion battery (AZIBs). Here, we report on a multifunctional additive, Sodium lactobionate (SL), that achieves more stable cycling performance. SL molecule can loosen the solvation structure of water and Zn 2+ , inhibit corrosion and hydrogen evolution reactions , and regulate ion deposition in AZIBs. Under the action of SL, the Zn//Zn symmetric battery achieves an ultra-long stable cycle of up to 2150 h at a current density of 2 mA·cm −2 and an area capacity of 1 mAh cm −2 and Zn//NVO can still perform 1110 cycles at the current density of 2 A g −1 and maintain the reversible specific discharge capacity of 179 mAh g −1 . In addition, at 2 mA cm −2 and 0.5 mAh cm −2 , the Zn//Cu asymmetric battery achieved up to 350 cycles with a coulomb efficiency of 99.5 %.
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Arabian Journal of Chemistry
·
2018
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IF 2.969
Shuai Zhang,Shoulian Wei,Hao Cheng,Wei Li
Nano-scaled Fe 3 O 4 were synthesized using solvothermal synthesis, and amino-modification of nano-scaled Fe 3 O 4 was conducted with APTES. With Fe 3 O 4 -NH 2 and Zn 2+ as the metal centers, 2,6-pyridinedicarboxylic acids as the organic ligand, and using the one-step ultrasonic-assisted method, a new magnetic zinc pyridinedicarboxylic acid nanocomposite (Zn-(PDC) 2 @Fe 3 O 4 ) was synthesized. The structure, composition and morphology of the products were characterized using methods such as X-ray single crystal diffraction, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction, and scanning electron microscope. The results showed that the Zn-(PDC) 2 was almost an octahedron, and the Zn-(PDC) 2 @Fe 3 O 4 looked like a nanoflower. The mimetic peroxidase properties of Zn-(PDC) 2 @Fe 3 O 4 were studied with H 2 O 2 solution and TMB solution as the substrates, and the results showed that: the Michaelis constant of H 2 O 2 by Zn-(PDC) 2 @Fe 3 O 4 was: K m = 0.411 mM, the maximum reaction rate: v max = 3.440 × 10 −8 M s −1 ; the Michaelis constant of TMB by Zn-(PDC) 2 @Fe 3 O 4 was: K m = 0.189 mM, and the maximum reaction rate: v max = 2.419 × 10 −8 M s −1 , both of which were lower than those of H 2 O 2 and TMB by Fe 3 O 4 and Horseradish Peroxidase (HRP). Based on the reduction of the absorbance of original solution due to the consumption of H 2 O 2 in oxidation-reduction reaction between SO 3 2− and H 2 O 2 under acid conditions, a new method for determining the content of SO 3 2− was established. The linear range of SO 3 2− was 8 × 10 −7 ∼8 × 10 −5 mol/L, the detection limit of SO 3 2− was 8 × 10 −8 mol/L, and the RSD of SO 3 2− was 2.7–9.2%.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jinquan Zhou,Baojiu Hao,Chenglin Yan,Zhenkang Wang,Tao Qian
There is a key missing point in the research field of zinc metal batteries (ZMBs); that is, no one pays attention to the crystal growth of byproducts. In this paper, from the perspective of crystallography, a method of disturbing the crystal growth of corrosion byproducts is proposed to improve the serious water-related corrosion in ZMBs. In consideration of the thermodynamics and dynamics of crystallization, the corrosion inhibitor (CI) molecules are introduced to envelop the active growth sites of byproduct crystals and increase the surface free energy change (ΔGs), thus leading to a positive free energy change (ΔG) unfavorable for crystal formation and growth. Therefore, the expansion of the crystal lattice (that is, crystal growth) is impeded, resulting in the distortion and inhibition of the byproduct crystal structure, which have been comprehensively validated through density functional theory (DFT) calculations and in situ X-ray diffraction (XRD) measurements. Extensive research is also conducted on various CI compounds with an adjusted number of phosphate groups and carbon chain length. This work innovatively focuses on inhibiting the crystallization process of byproducts, which is of great significance for the study of water-related corrosion, showcasing the significant potential in enhancing the longevity of aqueous batteries.
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