CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mengting Jiang,Chenying Shi,Yuling Liu,Xiaopeng Li,Tengfei Deng
The mechanism of Mg 2+ introduction on the thermal expansion properties of Al 2 TiO 5 ceramics was elucidated through experimental characterization and theoretical calculation for Mg x Al 2(1-x) Ti 1+x O 5 (x = 0, 0.25, 0.50, 0.75). Results showed that as x increased from 0 to 0.75, the calculated thermal expansion coefficient (single-crystal) exhibited minimal variation, while the apparent thermal expansion coefficient (polycrystalline) increased from 0.09 × 10 -6 K -1 to 3.85 × 10 -6 K -1 (1000 °C). The low apparent thermal expansion of Al 2 TiO 5 (x = 0) was attributed to microcrack healing and pore compensation effects. For x = 0.75, the enhanced apparent thermal expansion was correlated with reduced microcrack formation and improved densification. The incorporation of Mg 2+ reduced octahedral distortion and lattice stiffness, thereby suppressing transverse vibrations of bridging oxygen atoms and contraction along the c-axis. This reduced thermal expansion anisotropy and minimized microcrack formation. Additionally, as Mg 2+ content increased from x = 0 to x = 0.75, the porosity reduced from (11.23 ± 0.13) % to (3.96 ± 0.24) %, thereby weakening the pore compensation effect. These findings provide valuable insights for designing Al 2 TiO 5 -based ceramics with low thermal expansion.
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Qibiao Chen,Chao Qian,Shaodong Zhou
Global demand for lithium necessitates efficient extraction technologies, especially from low-quality brines with high magnesium-to‑lithium (Mg/Li) ratios, where conventional methods falter. This study presents a novel, quantum chemistry-guided methodology for the rational design of solvent extraction systems to address this challenge. By evaluating lithium binding affinities, triisopropylphenyl phosphate (TiPPP) was identified as a superior extractant. When formulated into an TiPPP-FeCl 3 system, it demonstrated exceptional performance under optimized conditions (90 % vol extractant, Fe/Li molar ratio of 1.2, O/A ratio of 1). In a single stage, the system achieved a lithium extraction efficiency of 92.8 %, corresponding to a remarkable Li/Mg separation factor of 1699. After scrubbing and stripping, the Mg/Li mass ratio in the final product was reduced to 0.0199, a 4156-fold decrease from the initial brine (82.7), outperforming the conventional tributyl phosphate (TBP)-FeCl 3 system. A combination of DFT calculations and spectroscopic analyses (Infrared spectroscopy, Ultraviolet spectroscopy, Raman spectroscopy, and electrospray ionization mass spectrometry) confirmed that the high selectivity is governed by both the electronic environment of the phosphoryl (P=O) group and the steric hindrance effects. This study not only presents a high-performance system for direct lithium extraction but also establishes a rational design paradigm for developing advanced extractants for challenging separation tasks.
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高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 27
·2300746
·
IF 27.8
Yaoshen Niu,Zilin Hu,Bo Zhang,Dongdong Xiao,Huican Mao,Lin Zhou,Feixiang Ding,Yuan Liu,Yang Yang,Juping Xu,Wen Yin,Nian Zhang,Zhiwei Li,Xiqian Yu,Hao Hu,Yaxiang Lu,Xiaohui Rong,Ju Li,Yong-Sheng Hu
Na-ion batteries (NIBs) are promising for grid-scale energy storage applications. However, the lack of Co, Ni-free cathode materials has made them less cost-effective. In this work, Mg 2+ is successfully utilized to activate the oxygen redox reaction in earth-abundant Fe/Mn-based layered cathodes to achieve reversible hybrid anionic and cationic redox capacities. A high first charge capacity of ≈210 mAh g −1 with balanced charge–discharge efficiency is achieved without O-loss, showing a promising energy cost of $2.02 kWh −1 . Full cell against hard carbon anode without pre-sodiation shows energy density exceeding ≈280 Wh kg −1 with a decent capacity retention of 85.6% after 100 cycles. A comprehensive analysis of the charge compensation mechanisms and structural evolution is conducted. Voltage and capacity loss resulting from partially reversible Fe 3+ migration to the Na layer is confirmed, shedding light on further improvements for low-cost NIB cathodes in application scenarios.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 5
·2210343
·
IF 19.924
Qiuchen Xu,Shitao Geng,Bin Yuan,Meng Liao,Lei Ye,Xiaoju Zhao,Yan Wang,Xiao Zhang,Shuo Wang,Zongtao Qu,Han Miao,Zhibin Yang,Yue Gao,Bingjie Wang,Yongfeng Zhou,Huisheng Peng,Hao Sun
Lithium/thionyl chloride (Li/SOCl 2 ) primary batteries are appealing power solutions because of their remarkable electrochemical performances. However, their mass applications are hindered by the challenges in sustainability, cost and safety concerns owing to the employed Li chemistry. Here, magnesium (Mg) chemistry is shown as a promising alternative through synergistic optimization of electrolyte solvation and electrode reaction kinetics. The first Mg/SOCl 2 primary battery yields surprisingly high specific capacities up to ≈14 000 mAh g −1 at a decent discharge voltage of ≈1.67 V, which outperforms the state-of-the-art Mg-based primary batteries. In addition, it retains almost 100% of the original capacity after 20-day reservation. The impressive battery performances are originated from the stabilized MgCl 2 formation on high-surface-area carbon cathode and suppressed Mg anode corrosion via the Mg-induced solvation effect. Mg/SOCl 2 primary batteries are promising candidates for low-cost and recyclable power supplies, and they thus open new avenues for the development of sustainable battery chemistries.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zijun Hu,Liang Huang,Xiaotang Gan,Yan Han,Jun Chu,Zhiping Song
Rechargeable magnesium batteries (RMBs) are one of the most promising “post-lithium” battery technologies, but the electrochemical performance is still far from expectation due to the sluggish reaction kinetics of divalent Mg2+ ions. Herein, we report a low-cost, high-performance Mg–organic battery based on the combination of a fluorinated alkoxyaluminate electrolyte and a carbonyl polymer cathode material. First, the one-pot synthesized Mg[Al(HFIP)4]2 (HFIP = hexafluoro-2-propanol) is proved superior to the Mg[B(HFIP)4]2 analogue in both Mg anode compatibility and electrochemical window, as the electrolyte salt in the G2–DME (G2 = diethylene glycol dimethyl ether; DME = 1,2-dimethoxyethane) mixture solvent. Second, a simple wet grinding method is proposed to effectively improve the dispersion uniformity of the poly(benzoquinone-pyrrole) (PBQPy) active material in the cathode. Third, the elaborate Mg–PBQPy battery exhibits superior electrochemical performance within 0.4–3.0 V, including a high reversible capacity of 197 mA h g–1, a high average discharge voltage of 1.6 V, and a high capacity retention of 71% after 500 cycles. Finally, based on various electrochemical analysis and ex situ characterization results, we propose a general microscopic structure evolution model to reveal the electrochemical behaviors of carbonyl polymer cathode in RMBs, including the swelling of polymer active material, trapping of Mg2+ ions, and reversible redox reaction.
研究领域:
材料科学
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电化学
·
能源存储
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高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Fan Li,Xiumin Yang,Zaolong Zhang,He Xiao,Junlian Wang
To address the third-phase formation and high-acidity stripping corrosion of the traditional TBP-FeCl₃ system for Li extraction from high Mg/Li ratio salt-lake brines, this study developed a TBP-MNPK-kerosene-FeCl₃ system using 2-heptanone (MNPK) as a modifier. MNPK eliminated third-phase formation and enabled complete phase separation within 50s. Under optimal conditions (20 vol % kerosene, 40 vol % TBP), Li extraction efficiency reached 85.4 % with a Li/Mg separation factor of 315. After water scrubbing and 3 mol/L HCl stripping, the stripping solution had 5.46 g/L Li (3.12-fold enrichment) and Li/Mg ratio of 11.38. This system provides an efficient, industrial-feasible Li extraction solution.
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高影响因子
ADVANCED SYNTHESIS & CATALYSIS
·
2025
·
IF 4
Haonan Li,Weimin Ma,Pei Kang,Yingxuan Li
The rational design of efficient thermal-photo CO 2 reduction catalysts necessitates synergistic integration of structural modulation and reactant activation strategies. Herein, a Mg-doped Bi nanosphere catalyst is reported, engineered for efficient CO 2 reduction under H 2 O-H 2 co-feeding conditions. Mg doping not only optimizes the nanostructure by reducing the particle size but also modifies the surface charge distribution and enhances water adsorption, thereby promoting CO 2 activation and catalytic performance. Crucially, under H 2 O H 2 co-feeding, H 2 O interacts with Bi to generate hydroxylated Bi OH sites that promote CO 2 chemisorption, while H 2 supplies hydrogen species (*H) for CO 2 reduction. In situ diffuse reflectance infrared Fourier transform spectroscopy reveals a cooperative mechanism: CO 2 adsorbs on Bi OH to form *CO 3 2− intermediates, which undergo sequential reduction facilitated by H 2 activation. This synergy achieves a CO production rate of 55.32 μmol·g −1 ·h −1 under 420 nm illumination with 100% selectivity, which is 2.4 times higher than that under a pure H 2 atmosphere. The work highlights the critical role of dopant-driven active site engineering and reactant synergies (H 2 O H 2 ) in CO 2 valorization, providing a scalable strategy for catalytic performance enhancement.
研究领域:
催化化学
·
材料科学
·
环境化学
·
可再生能源
·
化学工程
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DOI
高影响因子
Advanced Sustainable Systems
·
2025
·Vol. 9
·期 6
·2500061
·
IF 6.1
Tengfei Wang,Xiaoyang Wei,Keyi Chen,Guyue Li,Zhang Chen,Yanfeng Gao,Chilin Li
Rechargeable magnesium batteries (RMBs) have attracted extensive attention due to the high volumetric capacity and natural abundance of magnesium (Mg) metal anode. However, the Mg metal anode in ether-based electrolyte systems often suffers from surface passivation, leading to the irreversible plating/stripping behavior of Mg. In this work, for the first time, an effective strategy is proposed to modify the Mg metal anode by in situ alloy formation using a chlorine-free organic metal compound, triphenyl bismuth (TPB). Through electrochemical reduction, an Mg-Bi alloy forms uniformly on the Mg metal anode surface, providing abundant nucleation sites for Mg, allowing for smooth and stable Mg deposition and suppressing the occurrence of short circuits. In a 1,2-dimethoxyethane (DME)-based electrolyte system, the addition of TPB significantly improves the electrochemical performance of Mg anode, enabling stable cycling for up to 170 h at a low overpotential. Similarly, in the tetraethylene glycol dimethyl ether (G4) electrolyte system, excellent performance is observed, achieving stable cycling of 240 h. This work confirms the feasibility of using chlorine-free organic metal additives to improve the Mg anode interface and provides new possibilities for enhancing the practical applications of RMBs.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
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DOI
高影响因子
GREEN CHEMISTRY
·
2024
·Vol. 26
·期 5
·2763-2772
·
IF 9.3
Lei Guo,Shuaibo Gao,Zuojun Hu,Yongxin Wu,Fangzhao Pang,Huayi Yin,Dihua Wang
Green metal-electrode batteries call for the clean production of s-block metals. Herein, we developed an electrolysis–displacement–distillation (EDD) approach for producing s-block metals with low-carbon emissions and no chlorine gas evolution. The clean production stems from the choice of a molten NaCl–Na2CO3 electrolyte to prevent chlorine gas evolution, an inert nickel-based anode to produce oxygen, and a liquid metal cathode to make the cathodic product (e.g., Na–Sn) sit at the bottom of the electrolytic cell. Later, M–Sn (M = Li, Mg, Ca, Sr, and Ba) alloys were successfully prepared by a displacement reaction between the Na–Sn alloy and molten NaCl–LiCl, NaCl–MgCl2, NaCl–CaCl2, NaCl–SrCl2, or NaCl–BaCl2 with a displacement efficiency of >96.0%. Furthermore, Li, Mg, Ca, Sr, and Ba metals were separated from M–Sn alloys using vacuum distillation with a separation rate of >95.0%. We achieved a current efficiency of 81.0% for the electrolytic production of 100 kg of a liquid Na–Sn alloy, which holds promise to produce s-block metals at a large scale.
研究领域:
材料科学
·
化学工程
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 24
·期 1
·272
·
IF 6.208
Lei Chen,Yijia Yin,Linjia Jian,Xianglong Han,Xuefeng Zhao,Donghui Wang
Osteogenic and antibacterial abilities are the permanent pursuit of titanium (Ti)-based orthopedic implants. However, it is difficult to strike the right balance between these two properties. It has been proved that an appropriate alkaline microenvironment formed by Ti modified by magnesium–aluminum layered double hydroxides (Mg–Al LDHs) could achieve the selective killing of bacteria and promote osteogenesis. However, the existence of Al induces biosafety concerns. In this study, iron (Fe), an essential trace element in the human body, was used to substitute Al, and a calcinated Mg–Fe LDH film was constructed on Ti. The results showed that a proper local alkaline environment created by the constructed film could enhance the antibacterial and osteogenic properties of the material. In addition, the introduction of Fe promoted the Fenton reaction and could produce reactive oxygen species in the infection environment, which might further strengthen the in vivo bactericidal effect.Keywords:antibacterial;osteogenic;Mg–Fe layered double hydroxides;alkaline microenvironment;Fenton reaction
研究领域:
材料科学
·
生物材料
·
骨科
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DOI
PubMed
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2017
·
IF 4.396
Huimin Xu,Zhonghua Zhang,Zili Cui,Aobing Du,Chenglong Lu,Shanmu Dong,Jun Ma,Xinhong Zhou,Guanglei Cui
Herein we present a strong anion receptor-assisted Mg-ion electrolyte, which is synthesized from tris(2H-hexafluoroisopropyl) borate (THFPB) and MgO in 1,2-dimethoxyethane (DME). The as-prepared borate magnesium oxide complex (BMOC) electrolyte delivers exceptional electrochemical performances, including extremely high anodic stability (up to 4.2 V vs. Mg), non-corrosivity to stainless steel and aluminium foils , and reasonable ionic conductivity of 1.74 × 10 − 4 S cm − 1 . In addition, by virtue of the non-nucleophilic characteristic of the BMOC electrolyte, S ||BMOC ||Mg cells have been assembled, which show a high stable discharge capacity of 1030 mAh g − 1 for 15 cycles and one well-defined voltage plateau of ≈ 1.1 V vs. Mg, yielding a desirable energy density beyond 1100 Wh kg − 1 based on the weight of sulfur in cathodes.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
·
无机化学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Zan Jiang,Jianguang Yuan,Huanqing Han,Ying Wu
As an important member of complex hydrides , Mg(BH 4 ) 2 has a high gravimetric capacity (14.9 wt%). In this study, the Mg(BH 4 ) 2 was synthesized by the ion exchange method. Afterwards, the Mg(BH 4 ) 2 composites with different amounts (2, 5, 10, 25 and 50 wt%) of carbon nanotubes (CNTs) were prepared by mechanical milling. Effects of the CNTs on the microstructural evolution and hydrogen storage properties were investigated. The onset desorption temperature of the Mg(BH 4 ) 2 -5 wt% CNTs is decreased to lower temperature around 120 °C from 275 °C. The desorption plateau of Mg(BH 4 ) 2 -5 wt% CNTs is the highest, which ascribes that CNTs causes the reaction pathway change. Additionally, the Mg(BH 4 ) 2 -5 wt% CNTs shows the best dehydriding kinetics properties, and can desorb 6.04 wt% hydrogen within 2000 s at 300 °C. The dehydrogenation activation energy of the Mg(BH 4 ) 2 -5 wt% CNTs is decreased to 130.2 kJ/mol H 2 , which is much lower than that of pure Mg(BH 4 ) 2 .
研究领域:
材料科学
·
无机化学
·
能源材料
·
纳米材料
·
固态储氢
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高影响因子
危险品化学品经营许可证（带存储）