Minerals
·
2023
·Vol. 13
·期 3
·318
·
IF 2.5
Yingli Chen,Xiyun Yang,Linglong Wu,Lirong Tong,Jing Zhu
This paper describes a leaching-purifying-precipitation process to recover magnesium from serpentine acid-leaching solution and to synthesize high purity Mg(OH)2and 4MgCO3·Mg(OH)2·4H2O. Fe, Al, and Cr in the leaching solution were removed using the oxidation precipitation method with active MgO as a precipitant and H2O2as an oxidant. Ni, Co and Mn were removed by Na2S precipitation to obtain a pure MgSO4solution. Mg2+ions were first precipitated with NH3·H2O to synthesize Mg(OH)2, followed by NH4HCO3precipitation to obtain 4MgCO3·Mg(OH)2·4H2O. A small part of MgSO4coprecipitates with Mg(OH)2to form MgSO4·5Mg(OH)2·3H2O. The Mg(OH)2was aged with a diluted NaOH solution to remove the sulfur; the two-stage precipitation percentage of Mg is 96.3%. Mg(OH)2has a purity of 98.48% with a sulfur content of 0.28%. This process provides a promising method for the high-efficiency recovery of Mg and the large-scale production of the high purity of Mg(OH)2from the serpentine.Keywords:serpentine;two-stage counter current leaching;remove impurity;MgSO4·5Mg(OH)2·3H2O;high purity Mg(OH)2
研究领域:
冶金工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Materials
·
2022
·Vol. 6
·期 6
·e12486
·
IF 13.443
Dong Chen,Xin Ren,Ting Li,Zhongxue Chen,Yuliang Cao,Fei Xu
Rechargeable Mg batteries (RMBs) are a promising large-scale energy-storage technology with low cost and high safety, but the performance is limited by the inferior kinetics of Mg-intercalation cathodes. In the present study, an octylamine-supporting interlayer expanded molybdenum diselenide (e-MoSe 2 ) is synthesized and used as cathode for RMBs, in comparison with ordinary crystalline MoSe 2 . The octylamine molecules introduced show a strong interaction with the MoSe 2 layers and increase the layer spacing significantly from 6.46 to 11.5 Å. e-MoSe 2 shows a high Mg-storage capacity of 238 mAh g −1 at 50 mA g −1 and a superior rate performance of 39 mAh g −1 at 10 A g −1 , far advantageous over crystalline MoSe 2 . e-MoSe 2 also shows a considerably high structure stability during repeated magnesiation/demagnesiation, providing an outstanding cycling stability for 1000 cycles. Further electrochemical tests demonstrate the high Mg 2+ diffusion coefficients in e-MoSe 2 . Theoretical computation indicates the interlayer expansion changes the Mg 2+ diffusion paths from “hollow site → hollow site” to “hollow site → Se atom site → hollow site”, largely decreasing the energy barrier and improving the Mg 2+ diffusion kinetics. The present work highlights an efficient strategy for the improvement of Mg-storage performance for RMB cathodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yuanxiang Zhang,Tianlong Huang,Maosheng Cui,Xiaoxiao Wang,Zhen Mu,Mengting Yuan,Zilu Wei,Meng Yuan,Yanwei Sui,Jiqiu Qi,Yang Zhang,Xiaolan Xue
Although rechargeable magnesium batteries (RMBs) represent a promising post‑lithium energy storage technology, the formation of a non-conductive Mg 2+ passivation layer on Mg anodes remains a significant challenge. Here, we develop a novel all-inorganic electrolyte with low overpotential for Mg plating/stripping by introducing electrochemical active CuCl into a MgCl 2 /THF solution (MgCl 2 -CuCl/THF). During cycling, a multi-functional interface layer composed of Cu and Cu x Mg y Cl z is formed in situ on the Mg anode surface, which not only promotes MgCl 2 salt dissociation but also offer rapid-electron transport pathways. Moreover, the Cu + with reversible redox nature in Cu x Mg y Cl z can accommodate and release Mg 2+ ions, thereby facilitating rapid and homogenous Mg 2+ deposition. Consequently, the optimized MgCl 2 -CuCl/THF electrolyte enables Mg//Mg symmetric cells to cycle stably for over 1300 h at 0.5 mA cm −2 , with an overpotential as low as 0.15 V (vs. Mg 2+ /Mg). Furthermore, excellent Mg electro-plating/stripping properties have also been demonstrated in Mg//Mo, Mg//Cu, and Mg//SS asymmetric cells, achieving nearly 100 % Coulombic efficiency and stable cycling for over 138, 138, and 55 days, respectively. This work provides a promising strategy for the design of high-performance electrolyte systems for advanced RMBs.
研究领域:
储能
·
电化学
·
电池技术
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材料科学
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Yushuang Yang,Yaoyao Liu,Lutan Dong,Xianglin Yin,Haichen Huang,Lequan Deng,Zhaofen Wang,Haoying Qi,Xingmin Yu,Jian-Jun Wang,Peihua Zhu,Hong Liu,Hao Chen
Inactive magnesium, including electrochemically formed nanoscale Mg2+ ions in the solid electrolyte interphase (SEI Mg2+) and electrically isolated unreacted nano metallic Mg (Mg0), contributes to poor capacity and cycle life in magnesium metal batteries. Nevertheless, the precise quantification of nanoscale SEI Mg2+ versus inactive Mg0, as well as their formation mechanisms and relationship with the anode cycling reversibility, remains elucidated, thereby hindering progress in anode optimization design. Here, a magnesium-targeted acid-assisted continuous titration-collection-gas chromatography (AAC-TCGC) technique is developed to precisely quantify the percentage of nanolevel inactive SEI Mg2+ and Mg0 in Mg anode, revealing that the predominant contributor to Mg loss is the nanolevel inactive SEI Mg2+, which is different from the well-known inactive metal-dominant loss mechanism in Li/Zn battery. We find that the nanoscale SEI Mg2+ is mainly from the side reaction of the Mg anode with electrolyte anions/solvents or contaminants. We also discover a phenomenon that uniaxial stack pressure has no effect on altering the performance or morphology in the Mg metal anode (also distinct from Li/Zn anode behavior), highlighting the importance of nanoscale SEI Mg2+ loss tuning for magnesium metal battery construction. This study offers theories and approaches concerning the quantification and formation mechanism of inactive magnesium, crucial for developing high-performance magnesium metal batteries.
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产品关联
DOI
PubMed
高影响因子
CHEMPHYSCHEM
·
2023
·Vol. 24
·期 16
·e202300333
·
IF 2.9
Xinyi Zhao,Fei Xu
Graphical An amorphous molybdenum polysulfide material is synthesized and used as the cathode for rechargeable magnesium batteries. This electrode provides a high capacity (185 mAh g −1 ) and a good rate performance (50 mAh g −1 at 1000 mA g −1 ). A mechanism study demonstrates that both molybdenum and sulfur undergo redox reactions and contribute to the capacity. Rechargeable magnesium batteries (RMBs) attract research interest owing to the low cost and high reliability, but the design of cathode materials is the major difficulty of their development. The bivalent magnesium cation suffers from a strong interaction with the anion and is difficult to intercalate into traditional magnesium intercalation cathodes. Herein, an amorphous molybdenum polysulfide (a-MoS x ) is synthesized via a simple one-step solvothermal reaction and used as the cathode material for RMBs. The a-MoS x cathode provides a high capacity (185 mAh g −1 ) and a good rate performance (50 mAh g −1 at 1000 mA g −1 ), which are much superior compared with crystalline MoS 2 and demonstrate the privilege of amorphous RMB cathodes. A mechanism study demonstrates both of molybdenum and sulfur undergo redox reactions and contribute to the capacity. Further optimizations indicate low-temperature synthesis would favor the magnesium storage performance of a-MoS x .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Yanning Chen,Liang Wu,Wenhui Yao,Jiahao Wu,Yuan Yuan,Bin Jiang,Fusheng Pan
The MgAl Layered double hydroxides (LDHs)/graphene oxide (GO) composite film was fabricated in situ on the micro-arc oxidation (MAO) film (MAO/LG) of AZ31 magnesium alloy in one step by hydrothermal chemical conversion method. The growth behavior and corrosion properties of LG films were investigated. The results show that the chemical structure, composition and morphology of the LG film will gradually change with the extension of the hydrothermal treatment time based on using the self-dissolved cation (Mg 2+ and Al 3+ ) in the MAO film as the source of growing LDHs without introducing any external metal cations. The potentiodynamic polarization showed that the MAO/LG-12 h coating (1.28 × 10 −9 A/cm 2 ) after in situ growth for 12 h was more corrosion resistant than the MAO coating (8.49 × 10 −6 A/cm 2 ). The synergistic effect of GO and LDHs can significantly improve the corrosion protection ability of MAO coating. In addition, the transition process of the growth behavior of the LG film layer on the MAO coating is explained in detail.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Peng Chen,Siyang Tang,Hairong Yue,Changjun Liu,Chun Li,Bin Liang
A new method coupling CO2 mineralization and solvent extraction was proposed and investigated to precipitate magnesium from high Mg/Li ratio brine. Organic amine was employed to extract HCl formed during the CO2 mineralization process and to realize continuous conversion of MgCl2 to precipitated MgCO3, thereby removing the magnesium contained in the brine. The effects of brine concentration, extractant, diluents, extractant concentration, phase ratio, and reaction temperature were systematically investigated. A blend of trioctylamine and isoamyl alcohol was used as the extractant and diluent, and the reaction parameters were optimized. The mechanism was proposed, and a stripping process was designed. Under the optimal conditions, the conversion of magnesium was as high as 67.41%, and the Mg/Li ratio of the raffinate decreased from 20 to 5.4.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Yongqin Wang,Yangze Huang,Yu Fu
Hybrid Li Mg batteries stand out by combining the rapid lithium diffusion kinetics and the advantages of magnesium. However, the uneven Mg deposits may result in continuous parasitic reactions and penetrate the separator. Herein, cellulose acetate (CA), with functional groups, was applied to engineer coordination with MOFs and construct the evenly-distributed and ample nucleation sites. Moreover, the hierarchical MOFs@CA network was fabricated via the metal ion pre-anchored strategy to regulate the uniform Mg 2+ flux and improve ion-conductivity simultaneously. Furthermore, the hierarchical CA networks with well-ordered MOFs provided efficient MOF-to-MOF ion-transportation channels and served as ion sieves to inhibit anion transportation, thereby mitigating polarization. The super dendrite-inhibition and interfacial compatibility was confirmed and the assembled Mo 6 S 8 //Mg batteries exhibited high capacity about 105 mAh g −1 and capacity decay of 4 % after 600 cycles at 30 C, which surpassed the state-of-the-art LMBs system employing Mo 6 S 8 electrode. The fabricated GPE sheds fresh strategy for the design of CA-based GPEs and bright light on the promise of high-performance LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE FORUM
·
2014
·
IF 0
Lu Liu,Hui Ren,Qing Jie Jiao
Due to high reaction activity and high combustion heat release, magnesium is widely used in the field of explosives. The research focus of this article is the effect of magnesium powder size and content on the thermal decomposition of PTFE. Two different particle sizes of magnesium powder are regarded as research objects. The thermal behavior of Mg/PTFE energetic system was investigated by TG-DSC analyzer. The experimental results show that magnesium has a catalytic effect on the thermal decomposition of PTFE. With the increase of magnesium content , the decomposition peak temperature of PTFE decreased firstly and when passed the ratio 50% increased, the best mixing ratio is Mg: PTFE =50:50. Within nanopowder, the activation energy of PTFE decreased by 150kJ∙mol-1 compared to 112 kJ∙mol-1 by mixing with micro powder. Obviously nanopowder has a better reactivity than micro powder, so has a more obvious catalytic effect.
研究领域:
材料科学
·
热力学
✓ 已验证
DOI
Journal of Water Process Engineering
·
2024
·
IF 6.3
Qiang Wang,Haiqing Hao,Zhengyang Wu,Meng Wang,Zongyu Feng,Yongqi Zhang,Xiangxin Xue,Xiaowei Huang
The MgCl 2 wastewater generated from rare earth extraction and separation process was treated by spray pyrolysis with H 2 O 2 as an additive for the first time, and achieving full recycling of MgCl 2 wastewater. The effect of H 2 O 2 on the spray pyrolysis process, the kinetic of the spray pyrolysis process, and the mechanism of the effect on the activity of MgO powder were investigated. The results showed that H 2 O 2 and the O 2 produced by its decomposition had strong oxidizing property, which contributed to the removal of Cl roots. The kinetic results indicated that the rate determining step of MgCl 2 spray pyrolysis was transformed from chemical reaction to diffusion process after the temperature exceeded 1023 K. The activity study indicated that the doping of Cl led to severe distortion of the MgO grains, and polycrystalline basic magnesium chloride had more defect sites too. Thus, the powder showed high activity. Moreover, the thermal decomposition rate of MgCl 2 reached 99.83 %, the alkalinity of the powder reached 0.044 mol/g, and the iodine absorption value reached 131.81 mg I 2 /g MgO at temperature of 1073 K and amount of H 2 O 2 addition of 1 %. Meanwhile, the high purity hydrochloric acid with concentration of 6.54 mol/L was obtained.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Bingqin Li,Liangxing Jiang,Nan Xiao,Siliang Liu,Yang Lu,Huan Zhang,Zongliang Zhang,Fangyang Liu
The existing lithium extraction technologies from salt lakes are confronted with a number of challenges, including limited applicability to brines with elevated Mg/Li ratios and low overall lithium recovery rates. Therefore, it is crucial to develop direct lithium extraction technologies tailored to pristine brines. The core challenge in lithium extraction lies in the effective separation of magnesium and lithium. However, conventional methods struggle to efficiently separate Mg 2+ and Li + in a single-stage process. Lithium superionic conductors, such as Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP), are capable of exploiting their internal lithium ion vacancies to enhance the kinetic transport disparity between Mg 2+ and Li + , thus enabling efficient separation. By employing a high-temperature diffusion technique to introduce Ag + into the interstitial sites of the LATP lattice, the local positive charge density around Ag + is increased. This raises the migration barrier for Mg 2+ within the LATP, significantly improving the Li–Mg separation performance, with a notable long-term separation coefficient exceeding 25 000. Using 2% Ag-doped LATP, battery-grade Li 2 CO 3 with a purity of 99.7% can be produced directly from pristine salt lake brine with a Mg/Li ratio of 500 through a single-stage separation process.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Donggang Tao,Ting Li,Yudi Tang,Hongda Gui,Yuliang Cao,Fei Xu
Multivalent cation batteries are attracting increasing attention in energy-storage applications, but reversible storage of highly polarizing multivalent cations is a major difficulty for the electrode materials. In the present study, charge-delocalizing Mo3S13 cluster-based materials (crystalline (NH4)2Mo3S13 and amorphous MoSx) are designed and investigated as cathodes for rechargeable magnesium batteries. Both of the cathodes show high magnesium storage capacities (296 and 302 mAh g–1 at 100 mA g–1) and superior rate performances (76 and 80 mAh g–1 at 15 A g–1). A high area loading of 3.0 mg cm–2 could be achieved. These performances are of the highest level compared with those of reported magnesium storage materials. Further mechanism study and theoretical computation demonstrate the magnesium storage active sites are the bridging disulfur groups of the Mo3S13 cluster. The valence state of bridging disulfur decreases/increases largely during magnesiation/demagnesiation along with breaking/formation of the sulfur–sulfur bond, which makes the Mg-association/dissociation highly reversible. The sulfur–sulfur bond breaking and formation provides high reversible capacities. Prominently, the valence state increase and sulfur–sulfur bond formation of the bridging disulfur during charge weakens the bonding with Mg2+, significantly assisting the magnesium dissociation. The present study not only develops high-performance magnesium storage cathode materials but also demonstrates the importance of constructing favorable magnesium storage active sites in the high-performance cathode materials design. The findings presented herein are of great significance for the development of electrode materials for the storage of multivalent cations.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）