Polymers
·
2025
·Vol. 17
·期 7
·888
·
IF 4.9
Muzammil Hussain Memon,Md. Asraful Alam,Qiyuan Xie,Abdul Rahman Abbasi,Lele Wang,Jingliang Xu,Wenlong Xiong
Multi-component electrolyte additives may significantly contribute to improving the performance of rechargeable aqueous zinc-ion batteries. Herein, we propose a mixed electrolyte system employing polyethylene glycol 200 (PEG200) and quaternized kraft lignin (QKL) as co-additives in Zn//MnO2batteries. Reduced corrosion and the suppression of the hydrogen evolution reaction on the zinc electrode were achieved when 0.5 wt.% of PEG200 and 0.2 wt.% of QKL were added to the reference aqueous electrolyte. This optimized electrolyte, 0.5% PEG200 + 0.2% QKL, was conducive to improving Zn reversibility in Zn//Zn symmetric batteries and resulted in higher cycling stability, with a coulombic efficiency of 98.01% under 1 mA cm−2and 1 mAh cm−2for Zn//Cu cells. Furthermore, Zn//MnO2full batteries with 0.5% PEG200 + 0.2% QKL presented good overall electrochemical performance and exhibited a decent discharge capacity of around 85 mAh g−1after 2000 cycles at 1.5 A g−1. As confirmed by X-ray diffraction and scanning electron microscopy, a dominant (002) oriental dendrite-free Zn deposition was achieved on the zinc anode of the battery using 0.5% PEG200 + 0.2% QKL, and the byproducts were also reduced significantly. This study has contributed to the development of electrolyte co-additives for zinc-ion batteries.
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POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Zhishuo Liu,Yifang Hua,Suqin Liu,Hongfei Li,Xiaoyu Gu,Jun Sun,Sheng Zhang
In this study, a novel approach was employed to enhance the flame retardant efficiency of an intumescent flame retardant (IFR) by growing a layered double hydroxides (LDHs) of Zn/Fe on the surface of melamine polyphosphate (MPP), denoted as Zn/Fe-LDH@MPP (LDHMPP). This modification was carried out via in-situ co-precipitation, and the resulting composite was subsequently applied to polypropylene (PP) in conjunction with piperazine pyrophosphate (PAPP). Under the same proportion and concentration, the PP/16 %LDHIFR formulation achieved a preferred V-0 rating in the UL-94 test. Furthermore, this formulation exhibited an enhanced ability to form a protective char layer, as evidenced by both cone calorimetry tests (CCT) and thermogravimetric analysis (TGA) tests. Additionally, the synergistic effect of Zn/Fe-LDH on flame retardancy was also studied.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Yi Zhang,Zhimin Zou,Qi Liu,Yu Qiao,Chunhai Jiang
Zinc-ion capacitors (ZICs) are promising energy storage devices due to their balance between the energy and power densities inherited from Zn-ion batteries and supercapacitors, respectively. However, the low specific capacitance of carbon cathode materials and the dendrite growth on Zn anode have set fatal drawbacks to their energy density and cycle stability. Herein, we demonstrate that, in 1 M Zn(CF 3 SO 3 ) 2 /DMF (N, N-dimethylformamide) electrolyte, confining oxygen in carbon cathode materials via high-energy ball milling can synergistically introduce additional pseudocapacitance on the cathode side while suppressing the dendrite growth on Zn anode side, which jointly lead to high energy density (94 Wh kg −1 at 448 W kg −1 ) and long cycle stability of ZICs. The hydroxyl group in carbon cathode can be transformed to C—O—Zn together with the release of protons during the initial discharge, which in turn stimulates the defluorination of C F 3 SO 3 − anions and formation of ZnF 2 on both cathode and anode. The ZnF 2 formed on the surface of the Zn anode suppresses the dendrite growth by regulating the Zn 2+ deposition/stripping in a reticular structure, resulting in the excellent cycle stability. This work provides a facile strategy to rationally design and construct high energy and stable ZICs through engineering the oxygen-bearing functional groups in carbon cathode materials.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yifan Cui,Dezhi Yang,Qiulan Li,Zhongmei Peng,Zitao Zhong,Yuzhu Song,Qinqin Han,Yaling Yang
Nanozyme-mediated antioxidative therapy is a promising star for treating a myriad of important diseases through eliminating excessive reactive oxygen species (ROS) such as O2·– and H2O2, a critical mechanism for inflammatory bowel disease (IBD). This work provides a high biocompatibility iodine–copper–zinc covalent doped carbon dots (Cu,Zn,I-CDs) with the catalase (CAT)-, superoxide dismutase (SOD)- and glutathione peroxidase (GPx)-like catalytic activities for treating ulcerative colitis (UC) by scavenging overproduced ROS. We found that I dopant aids in counteracting the positive charge at Cu,Zn dopants brought on by low pH, enabling Cu,Zn,I-CDs to process strong triple antioxidant nanozyme activities rather than Cu,Zn-CDs. Vitro experiments displayed that the Cu,Zn,I-CDs could scavenge the excessive ROS to protect cellular against oxidative stress and reduce the expression of proinflammatory cytokines, such as TNF-α, IL-1β, and IL-6. In sodium dextran sulfate (DSS)-induced colitis mice models, Cu,Zn,I-CDs with excellent biocompatibility could effectively relieve the inflammation of the colon, containing the reduction of the colon length, the damaged epithelium, the infiltration of inflammatory cells, and upregulation of antioxidant genes. Therefore, the therapy of Cu,Zn,I-CD antioxidant nanozymes is an effective approach and provides a novel strategy for UC treatment.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zhenghao Chen,Hao Zheng,Jinhui Zhang,Zeyi Jiang,Cheng Bao,Chen-Hao Yeh,Nien-Chu Lai
The design and development of high-performance and long-life Pt-free catalysts for the oxygen reduction reaction (ORR) is of great important with respect to metal-air batteries and fuel cells. Herein, a new low-cost covalent organic frameworks (COFs)-derived Co N C single-atoms catalyst (SAC) is fabricated and compared with the engineered nanoparticle (NP) counterpart for ORR activity. The ORR performance of the SAC catalyst (Co SA @NC) surpasses the NP counterpart (Co NP -NC) under the same operation condition. Co SA @NC also achieves improved long-term durability and better methanol tolerance compared with the Pt/C. The zinc-air battery assembled by the Co SA @NC cathode delivers a higher power density and energy density than that of commercial Pt/C catalyst. Molecular dynamics (MD) is performed to explain the spontaneous evolution from clusters to single-atom metal configuration and density functional theory (DFT) calculations find that Co SA @NC possesses lower d -band center, resulting in weaker interaction between the surface and the O-containing intermediates. Consequently, the reductive desorption of OH*, the rate-determine step, is further accelerated.
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JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Jian-hua Zu,Xiao-han Pan,Xing-dong Su,Feng Liu,Jie Zhan,Ye He,Jiu-geng Chen
The removal of zinc ions (Zn(II)) in water and the separation of zinc isotopes were fully investigated in this study. Imidodiacetic acid (IDA) type adsorbent (named PSGI) based on polystyrene spheres (PS) was synthesized by simultaneous irradiation grafting. By adsorption method, the removal of Zn(II) from water by the chelating adsorbent was studied in batch experiments. Under optimized condition, PSGI showed the removal efficiency of more than 98 % for Zn(II) and the adsorption capacity of 70.1 mg/g. Langmuir isothermal and pseudo-second-order kinetic model fitted the experimental results better, indicating that the adsorption is dominated by chemical adsorption. The spent adsorbent (PSGI-Zn) was used for further zinc isotope separation by displacement chromatography using EDTA-NH 4 solution as eluent. Due to the mass effect of isotopes, 70 Zn was found to preferentially fractionated into the front-end effluents with the highest front enrichment values of 70 Zn/ 64 Zn. By extending the migration distance to 20 m, we obtained the best isotope enrichment with the front maximum enrichment values as 1.0949, 1.0739 and separation coefficient values as 1.977 × 10 −3 , 8.33 × 10 −3 corresponding to the isotope pairs 66 Zn/ 64 Zn, 68 Zn/ 64 Zn.
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Advanced Energy Materials
·
2024
·
IF 24.4
Dandan Li,Ying-Jie Zhu,Long Cheng,Sida Xie,Han-Ping Yu,Wei Zhang,Zhenming Xu,Ming-Guo Ma,Heng Li
Achieving both high iodine loading cathode and high Zn anode depth of discharge (DOD) is pivotal to unlocking the full potential of energy-dense Zn-I 2 batteries. However, this combination exacerbates the detrimental shuttle effect of polyiodide intermediates, significantly impairing the battery's reversibility and stability. Herein, this study reports an advanced high-loading iodine cathode (denoted as MX-AB@I) enabled by a multifunctional Ti 3 C 2 T x MXene modulator, which presents high stability and energy density in Zn-I 2 batteries. Through comprehensive experimental and theoretical analyses, the intrinsic regulating mechanisms are elucidated by which the MXene modulator effectively suppresses polyiodide shuttling, enhances iodine conversion kinetics, and dramatically improves Zn anode reversibility. With the aid of the MXene modulator, the MX-AB@I composite cathode achieves a high iodine mass loading of 23 mg cm −2 and realizes a practically high areal capacity of 4.0 mAh cm −2 . When paired with a thin Zn anode (10 µm), this configuration realizes a high Zn DOD of 78.7% and a high energy density of 171.3 Wh kg −1 , surpassing the majority of Zn-I 2 battery systems reported in the literature. This study presents an effective approach to designing high-loading iodine cathodes for Zn-I 2 batteries by leveraging MXene modulators to regulate critical electrochemical reaction processes.
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SmartMat
·
2024
·
IF 15.3
Zongkai Yan,Qi Cheng,Mengxuan Sun,Baoshan Wu,Yanlin Zhu,Zuwen Tong,Ming Li,Chunyang Jia,Panfeng Zhao
For aqueous zinc ion batteries (AZIBs), Zn dendritic growth and hydrogen evolution reaction (HER) usually result in the severe degradation of bare Zn anodes. Although the alloy-modified anodes can improve the reversibility of the Zn plating/stripping process, the regulation of alloy components is too complex to meet the requirements for large-scale fabrication. Herein, a Ni-Ag bimetallic coating on Zn foils (Ni-Ag@Zn) is prepared by magnetron co-sputtering. Owing to this bimetallic coating with the ultrathin thickness of 200 nm, the cycling life of Ni-Ag@Zn-based symmetric cells attains more than 5000 h at current density of 1 mA/cm 2 and areal capacity of 1 mA h/cm 2 , exceeding most of the reported binary/ternary-alloy-based symmetric cells. To the suppression of dendrite growth and HER, the regulation mechanism of the bimetallic coating on Zn deposition is assigned to the synergistic effect, the suppressed HER by the strong adsorption of Ag with H ions and the flatted Zn deposition via the strong adsorption of Ni/Ag with Zn ions. To our knowledge, both the bimetallic and ultrathin features have not been reported to optimize the anodes for AZIBs. The present bimetallic coating strategy renders the diversification of anode modification for the commercialization of high-performance AZIBs.
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Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-15
·
IF 31.6
Zou Xiaohong,Lu Qian,Tang Mingcong,Wu Jie,Zhang Kouer,Li Wenzhi,Hu Yunxia,Xu Xiaomin,Zhang Xiao,Shao Zongping,An Liang
Ni 3 Fe oxide, with an average size of 3.5 ± 1.5 nm, was successfully deposited onto polyaniline (PANI) support through a solvothermal strategy followed by calcination.
The catalyst–support interaction between Ni 3 Fe oxide and PANI can enhance the Ni-O covalency via the interfacial Ni-N bond.
Ni 3 Fe oxide/PANI-assembled Zn-air batteries achieve superior cycling life for over 400 h at 10 mA cm −2 and a low charge potential of around 1.95 V.
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Energy Storage Materials
·
2024
·
IF 18.9
Xin Wang,Hui Peng,Kanjun Sun,Fan Yang,Zhiyuan Liu,Shuzhen Cui,Xuan Xie,Guofu Ma
Aqueous zinc (Zn)-based energy storage devices have attracted great attention due to their inherent low cost, intrinsic safety, and environmental friendliness. However, the growth of Zn dendrite and side reactions from water decomposition have limited the lifespan of Zn-ion energy storage. Herein, a green and multifunctional melamine (M) molecules is proposed as electrolyte additive and incorporated into the ZnSO 4 electrolyte to modulate the deposition/stripping environment of Zn 2+ and stabilize the Zn anode. The results of experiments coupled with density-functional theory (DFT) calculations and molecular dynamics (MD) simulations show that M molecules are able to optimize the electrolyte environment and regulate the electrode-electrolyte surface. More specifically, the hydrophilic group (-NH 2 ) in the M molecule can effectively break the electrolyte sheath structure and reconstruct the hydrogen bonding network, because the M molecule has a stronger binding energy compared to H 2 O. Meanwhile, the -N= groups in M can anchor Zn 2+ and cooperate with them to form a dynamic electrostatic protective layer, change the electric field distribution around the Zn deposition layer, provide more nucleation sites for Zn 2+ and promote the deposition of Zn along the (002) crystal plane, thus inhibiting the random growth of Zn dendrite and the occurrence of side reactions. Consequently, the Zn//Zn symmetric cell assembled with the ZnSO 4 +M electrolyte presents boost the stable lifespan over 1,100 hours at a current density of 2 mA cm −2 , 1 mAh cm −2 , and also up to 1900 stable cycles with almost 100 % Coulomb efficiency for Zn//Cu asymmetric cell.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Zhongyun Yang,Xiaojia Zhang,Kexin Huang,Muhammad Waqas,Xinglan Peng,Limin Wang,Xiaotian Liu,Dujuan Huang,Qiulan Huang,Du-Hong Chen,Youjun Fan,Wei Chen
Fe/N/C is recognized promising catalyst for oxygen reduction reaction (ORR), playing a pivotal role in advancing the commercialization of proton exchange membrane fuel cells. However, an inadequate ORR activity hinders its potential applications. Here, we present the preparation of M–Nx–C (M = Fe, Zn) bi-active sites for promoting ORR. By the pyrolysis of benzimidazole salts, a porous coin-like iron-zinc-based nitrogen-doped carbon materials (FeZn-NC) catalyst was synthesized with abundant active sites. X-ray photoelectron spectroscopy and transmission electron microscopy characterizations indicated the successful doping of Zn and Fe within the carbon framework. Electrochemical measurements demonstrated great positive half-wave potential (0.90 V), high limiting current density (5.15 mA·cm −2 ), excellent methanol resistance, and good stability of FeZn-NC, compared to commercial Pt/C catalysts. Furthermore, an investigation into correlation between doping content of Fe and the ORR performance was carried out. As an cathode catalyst of zinc-air battery, FeZn-NC exhibited more significant advantages, including a high open-circuit voltage (1.54 V), enhanced power density (199.89 mW·cm −2 ), good specific capacity (771.9 mAh g Zn −1 ), and enhanced stability compared to Pt/C. By presenting an approach for the controlled synthesis of metal-doped carbon materials, this work establishes the groundwork for potential applications in catalytic fields, as demonstrated by the prepared FeZn-NC.
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CORROSION SCIENCE
·
2025
·
IF 8.5
Ru Yan,Xiao Zhang,Xiang Gao,Wei He,Houyi Ma
PAM formed by self-organization can be considered as nanocontainers of phytic acid (PA) molecules and used for the corrosion protection of metal materials. Herein, self-strengthening PAM-Zn conversion films were successfully constructed on CRS substrate by a simple dipping method. The highest protection efficiency of PAM-Zn films was 81.0 % and was further increased beyond 90 % after immersion in NaCl solution. The immersion treatment in NaCl solution not only promoted the formation of more P O 4 3 − and PAM-Zn complex, but also changed the surface microstructure and increased the film thickness and compactness, thereby leading to the great enhancement of anti-corrosion performance.
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