APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Tian Yang,Fengming Ma,Xinqun Zhang,Ya'nan Yang,Jinsheng Lv,Zifeng Jin,Liru Wang,Huimin Gao,Xiaolin Wang,Nan Chen
Rechargeable aqueous magnesium ion batteries (AMIBs) are considered a promising energy storage system due to the relatively high energy density, excellent rate performance and reversibility, and absence of dendrite formation during cycling. However, the high surface charge density of Mg 2+ ions results in slow diffusion kinetics, and high voltage leads to excessive electrolyte decomposition at the electrode/aqueous electrolyte interface, thereby limiting the development of high-energy–density MIBs. In this work, we extend the electrochemical stability window of the aqueous electrolyte to 2.1 V by using a hybrid ion superconcentrated electrolyte at concentrations not achievable with Mg 2+ electrolytes alone. The AMIB with a water-in-salt (WIS) electrolyte delivers discharge capacities of up to 200.6 and 84.4 mAh g −1 , and energy densities of 170.1 and 68.1 Wh Kg −1 at 0.5 and 20 A g −1 , respectively, representing excellent rate performance, while retaining 85 % of the specific capacity after 2000 cycles. Additionally, we explore the corresponding electrochemical reaction mechanism, revealing the synergistic effect of Mg 2+ and Li + ions in the charge/discharge process, which supports the excellent electrochemical performance of AMIB.
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高影响因子
Coatings
·
2024
·Vol. 14
·期 4
·383
·
IF 2.9
Chunling Xin,Shufen Hou,Lei Yu,Xiaojing Zhou,Yunkai Fu,Xiaoteng Yang,Weiwei Sun,Fan Yang,Xia Wang,Lili Liu
Yellow nanorod Mg-MOF-74 was obtained through a solvothermal synthesis method. The XRD, N2adsorption–desorption isotherms, SEM, and TGA results suggest that the particle size of Mg-MOF-74 reaches 400 nm after the introduction of sodium acetate in the precursor of Mg-MOF-74. Furthermore, the morphology of Mg-MOF-74 changed from cauliflower- to rod-shaped particles. At the same time, the BET specific surface area and pore volume of Mg-MOF-74 also increased a lot. Then, the CO2dynamic adsorption capacity of Mg-MOF-74 was measured with a self-made fixed bed at 30 °C and a 0.1 bar CO2partial pressure. The results show that the CO2adsorption capacity of Mg-MOF-74-N2 reaches 3.67 mmol/g, and its CO2adsorption capacity remains unchanged after 10 CO2adsorption–desorption cycles.
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Materials
·
2024
·Vol. 17
·期 12
·2904
·
IF 3.1
Xin Yang,Kaihua Li,Jun Li,Zhuo Sheng,Ying Liu
In this work, the preparation of titanium sponge by magnesium thermal method is regarded as the liquid-phase sintering process of titanium, and powder-metallurgy sintering technology is utilized to simulate the aggregation–growth and densification behavior of titanium particles in a high-temperature liquid medium (the molten Mg-MgCl2system). It was found that compared with MgCl2, Mg has better high-temperature wettability and reduction effect, which promotes titanium particles to form a sponge titanium skeleton at lower temperature. The aggregation degree of titanium particles and the densification degree of a sponge titanium skeleton can be improved by increasing the temperature and the relative content of Mg in the melting medium. The kinetics study shows that with the increase in temperature, the porosity of the titanium particle aggregates and the sponge titanium skeleton decreases, and their density growth rate increases. With the extension of time, the aggregation degree of titanium particles and the densification degree of sponge titanium gradually increase. This work provides a theoretical reference for controlling the density of titanium sponge in industry.
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PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 24
·6159
·
IF 3.1
Qidong Liu,Hongmei Chen,Xiumei Wu,Junjie Yan,Biaobiao Yang,Chenying Shi,Yunping Li,Shu Yu
Silicon oxycarbide (SiOC), Ca- and Mg-modified silicon oxycarbide (SiCaOC and SiMgOC) were synthesized via sol–gel processing with subsequent pyrolysis in an inert gas atmosphere. The physicochemical structures of the materials were characterized by XRD, SEM, FTIR, and29Si MAS NMR. Biocompatibility and in vitro bioactivity were detected by MTT, cell adhesion assay, and simulated body fluid (SBF) immersion test. Mg and Ca were successfully doped into the network structure of SiOC, and the non-bridging oxygens (NBO) were formed. The hydroxycarbonate apatite (HCA) was formed on the modified SiOC surface after soaking in simulated body fluid (SBF) for 14 days, and the HCA generation rate of SiCaOC was higher than that of SiMgOC. Accompanying the increase of bioactivity, the network connectivity (NC) of the modified SiOC decreased from 6.05 of SiOC to 5.80 of SiCaOC and 5.60 of SiMgOC. However, structural characterization and biological experiments revealed the nonlinear relationship between the biological activity and NC of the modified SiOC materials.
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PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Fangzhao Pang,Yongxin Wu,Xiaowei Liu,Xiang Chen,Lei Guo,Shuaibo Gao,Kaifa Du,Dihua Wang,Huayi Yin
The corrosion of positive grid alloys is important for determining the service life of lead-acid batteries (LABs). Herein, we prepared a series of PbCaSnAl-M (M = Mg, Sr, Ba) alloys by an induction melter and systematically investigated the effect of Mg, Sr and Ba on their microstructures and corrosion resistance. The results show that the average grain size of PbCaSnAl-Mg reduces from 14.56 μm to 11.96 μm, and the average grain size of PbCaSnAl-Sr and PbCaSnAl-Ba increases to 25.95 μm and 39.17 μm, respectively. The addition of Sr and Ba reduces the corrosion rate of PbCaSnAl alloys from 0.366 mg h −1 cm −2 to 0.258 and 0.289 mg h −1 cm −2 , respectively. The increase corrosion resistance is due to the Sr and Ba change the microstructures of the corrosion layer and improve the densification of the corrosion layer.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Xin Zhang,Lingyu Kong,Pingping Guan,Xue Yang,Aimin Liu,Haitao Huang,Zhongning Shi
Zinc alloy lithium-ion batteries (LIBs) anodes have received widespread attention due to their low cost and high theoretical capacity. However, its volume expansion during the cycling process leads to structural damage and pulverization of the active substance, greatly limiting its further development. This study reports a simple method for preparing pure zinc and Zn–Mg alloy anode materials by one step electrodeposition, and the effect of magnesium doping on the electrochemical performance of zinc anodes was studied. The results indicate that compared with pure zinc anodes, Zn–Mg alloys provide suitable voids for electron transfer and ion diffusion, reducing the charge transfer resistance of zinc anodes. The Zn 83.8 Mg 16.2 LIBs anode shows excellent specific capacity, rate performance, and cycling stability. At the current density of 100 mA g −1 , the initial discharge/charge capacities are 700.4/340.8 mAh·g −1 , and after 1000 cycles, the capacity remains at 137.9 mAh·g −1 and the coulombic efficiency is nearly 100 %. This study provides a candidate method for the preparation of alloy anode materials.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Haiqiang Bai,Biao Liu,Ling Kang,Yanhong Wang,Jing Bai,Santosh Kumar Verma,Yunhua Xu
The ability of magnesium-based hydrogen storage materials to store and release hydrogen is hampered by their relatively slow rates. To address this, Mg-x% Co (x = 5, 10, 15) magnesium-rich hydrogen storage alloys were fabricated using reactive ball milling. The resulting alloys were multiphase, composed of Mg, Co, MgCo₂, and Mg₂CoH₅, which provided nucleation sites and improved hydrogen uptake. The reduced particle size and surface microcracks and pores enhanced hydrogen diffusion. The Mg-15 %Co alloy had the ability to take in 4.72 wt% hydrogen in 1 min when the temperature was set at 350°C. Hydrogenation resulted in the formation of a biphasic structure composed of Mg₂CoH₅ and Mg₆Co₂H₁₁. This structure destabilized the Mg-H bond and improved the kinetics of hydrogen release. The hydrogen release capacity first increased and then decreased with Co content, with Mg-10 %Co showing the best performance. Due to the combined action of ball milling and Co catalysis, the Mg-10 %Co alloy had an activation energy for hydrogen release of 113.65 kJ/mol, making it the alloy with the lowest such activation energy in the set. Differential scanning calorimetry (DSC) analysis confirms that cobalt addition reduces the hydrogen release peak temperature of Mg by 16.58–29.67 °C, with the Mg-10 % Co alloy exhibiting peak temperatures of 410.72–425.53 °C, attributed to synergistic decomposition of MgH₂ with intermediate hydrides like Mg₂CoH₅ and Mg₆Co₂H₁₁. The findings of this study indicate that alloying Mg-based alloys with transition elements while performing ball milling is a practical method for enhancing their hydrogen storage and release kinetics.
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SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Baolin Xu,Zhenzong Shao,Yong Wang,Rong Xu,Chenkai Zhu,Libin Lu,Linguo Li,Jiaru Zhang,Xiaochuan Wu,Chi Zhang,Qianli Gao,Bin Yu,Baiwen Hu,Dongdong Xia
Magnesium (Mg) alloys are ideal candidates for biodegradable orthopedic implants, whereas the clinical utility is hindered due to excessive corrosion behavior. In this study, the novel hierarchical coating was designed for AZ31 Mg alloy to control corrosion and improve bioactivity. The process involved laser texturing treatment of the Mg substrate, followed by hierarchical coating where the bioactive glass coating (BC) as sublayer and BG-polyvinyl alcohol hydrogel composite (HC) as upper layer. The morphology, structure, interfacial properties and corrosion behavior of Mg specimens with coating treatment were investigated via SEM, EDS, XRD, XPS and electrochemical test. The cytocompatibility and osteoinductivity of MC3T3-E1 cells seeded on Mg specimens was investigated in vitro cell proliferation assay. The results of study demonstrated the mechanically interlocked interface could be created by laser texturing, thus significantly improving coating adhesion. With further coating treatment, the BC layer within crystalline phase could act as stable corrosion barrier, to reduce mass loss of Mg alloy immersed in simulated body fluid (SBF). Based on this, the HC coating was observed to effectively seal pores of BC layer as dense upper layer for hierarchical design (MgL-HC@BC), thus resulting in exceptional corrosion resistance and ability to maintain the pH in the physiological range, and consequently promoting cell adhesion with osteogenic differentiation. As such, this work presented a feasible and highly effective strategy for fabricating advanced bio-functional surfaces on biodegradable magnesium implants.
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高影响因子
Advanced Energy Materials
·
2025
·Vol. 15
·期 38
·e03481
·
IF 26
Minhui Yuan,Zhen Tong,Qing Cao,Wenjie Li,Min Ruan,Jiahao Jiang,Jingyi Lyu,Yanglong Hou,Ran He,Jing Shuai
N -type Mg 3 (Sb,Bi) 2 system has emerged as a groundbreaking thermoelectric (TE) material, renowned for its optimized electronic transport properties and intrinsically low lattice thermal conductivity (κ l ). However, the origin of anomalously low κ l and its weak temperature scaling (κ l ∼ T −0.5 , deviating from the classical T −1 behavior) remain elusive. Employing a theoretical framework that integrates ab initio anharmonic lattice dynamics into a unified heat transport theory accounting for particle-like propagation (κ p ) and wave-like coherent (κ c ) transport, phonon renormalization, and fourth-order anharmonic phonon scattering, the thermal transport property of Mg 3 Bi 2 is comprehensively investigated. It is found that the weakly bonded interlayer cation Mg atoms amplify phonon coherence through dynamic disorder, driving wave-like transport contributes ≈40% to κ l at 600 K, while four-phonon scattering significantly suppresses particle-like propagation (>40% reduction). The theoretical predictions of both the magnitude and temperature-dependent behavior of κ l in Mg 3 Bi 2 exhibit synergistic agreement with in-house and reported experimental values. This work pioneers key insights into the Mg cation sublattice tuning the particle-wave duality in phonon transport, its strong anharmonic potential disrupts phonon phase coherence while enhancing four-phonon scattering, collectively driving the low κ l in Mg 3 Bi 2 . This discovery provides two actionable design strategies—cation site engineering and coherent phonon tuning—for developing high- zT Mg 3 Bi 2 -based thermoelectrics.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Yuanzhen Duan,Jiyuan Zhu
Developing spray/template-free superamphiphobic surfaces that can resist various kinds of liquids is crucial for academic study and practical demands. In spite of significant evolution, facilely fabricating superamphiphobic surfaces remains a daunting challenge due to the practical dilemma of the time-consuming preparation process and the guarantee of wettability performance. Herein, a facile magnetron-sputtering-assisted chemical deposition technique is advanced to constitute hierarchical dendritic fractal structures on AZ91D Mg alloys that showcase remarkable biomimicry while significantly contributing to superamphiphobicity through extended re-entrant structures. As well as demonstrating promising chemical stability, such surfaces can display exceptional resistance to water and ethylene glycol. The approach employed to create such instrumental superamphiphobic surfaces offers substantial benefits in affordability and efficiency. Remarkably, the entire preparation process only takes 26 min, presenting a novel method for preparing superamphiphobic surfaces.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 17
·10282-10292
·
IF 4.22
Hussain Taimoor,Nie Pengfei,Hu Bin,Shang Xiaohong,Yang Jianmao,Liu Jianyun
Alkaline-earth metal-based MOF has many merits such as light weight, environmental friendliness and low cost, but it has rarely been used in energy storage and capacitive deionization (CDI). This paper presents a facile method for the fast synthesis of small-size magnesium formate MOF (Mg-MOF) under mild conditions by linker-free incubation in the presence of Mg(CH 3 COO) 2 ⋅ 4H 2 O and dimethylformamide. The formic acid was in situ formed as ligand to facilitate the formation of Mg-MOF. The effect of incubation time on the morphology of MOF crystals was investigated. The small and well-defined Mg-MOF particles with the size of ~ 18 nm were formed in 1 h incubation, characterized by scanning electron microscopy and X-ray diffraction. Following carbonization, the Mg-MOF-derived mesoporous carbon was obtained. N 2 -sorption isotherm confirmed the mesoporous structure. Cyclic voltammetry test indicated the good electric double-layer feature of the Mg-MOF-derived carbon electrode, and the impedance results showed the excellent conductivity. As a capacitor electrode material, it delivered the specific capacitances of 102 F/g by GCD (0.2 A/g). The Mg-MOF-derived carbon electrode was applied successfully for capacitive deionization (CDI) with a desalination capacity of 8.0 mg/g in a CDI device. A supper fast desalination rate of 1.1 mg/g/min was achieved due to the abundant mesoporous structure. The work provides a cost effective and environmentally friendly way for the synthesis of MOF-based carbon materials free of transition metal, and the prospects for CDI application have been demonstrated.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhi Zhang,Dongqiang Gao,Jiaguang Zheng,Ao Xia,Qingbo Zhang,Li Wang,Liuting Zhang
For solid-state hydrogen storage, Mg(BH 4 ) 2 has long been recognized as a promising material. However, its higher thermal stability is distant from conditions for practical application. Herein, it is effectively established that VF 4 nanoparticles anchored on 2D Mxene Ti 3 C 2 (VF 4 @Ti 3 C 2 ) have efficiently catalytic effects towards the hydrogen storage process of Mg(BH 4 ) 2 . The MBH-VF 4 @Ti 3 C 2 sample started releasing hydrogen at 90 °C, which was 182 °C and 55 °C lower than those of additive-free Mg(BH 4 ) 2 and MBH-20Ti 3 C 2 composites. Additionally, the MBH-20VF 4 @Ti 3 C 2 composite desorbed more than 8 wt% H 2 at 275 °C. The activation energies of dehydrogenation were reduced, and the improved reversibility of VF 4 @Ti 3 C 2 -doped Mg(BH 4 ) 2 was also discussed. According to microstructural study, the heterostructural VF 4 @Ti 3 C 2 interacted with Mg(BH 4 ) 2 to produce VH 2.01 and metallic Ti during re/dehydrogenation, which worked as active species to improve hydrogen storage performance in Mg(BH 4 ) 2 .
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