JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Jianling Huang,Hui Wang,Liuzhang Ouyang,Jiangwen Liu,Min Zhu
MgNi-based alloys have high electrochemical capacity as anode of nickel-metal hydride (Ni/MH) battery (≥500 mAh g −1 ). However the capacity decay seriously in charge-discharge cycling, which is previously ascribed to the corrosion of Mg. To solve this problem and reveal the related mechanism, the electrochemcial properties of Mg 0.50 Ni 0.50 , Mg 0.45 Ti 0.05 Ni 0.05 and Mg 0.40 Ti 0.10 Ni 0.50 alloys are studied in combination with their hydrogen storage properties and microstuctural evolution during cycling. This work demonstrates the amorphous phase in milled Mg 0.45 Ti 0.05 Ni 0.50 and Mg 0.40 Ti 0.10 Ni 0.50 alloys has higher resistance to hydrogenation-induced crystallization than milled Mg 0.50 Ni 0.50 alloy. Thus, they show better hydrogen absorption/desorption reversibility and contribute to the reversible electrochemical capacity. Therefore, the cycle performance of the Mg 0.50 Ni 0.50 alloy electrodes shows obvious improvement after partially substituting Mg by Ti. The capacity retention rate increases from 24.0% (Mg 0.50 Ni 0.50 ) to 55.7% (Mg 0.40 Ti 0.10 Ni 0.50 ) after 30 cycles. In addition, the Ti addition results in the formation of TiNi phase, and thus, the alloys show better electrochemical reaction kinetics and their high-rate dischargeability (HRD) is significantly improved. At 300 mA g −1 , the HRD values of Mg 0.50 Ni 0.50 , Mg 0.45 Ti 0.05 Ni 0.50 and Mg 0.40 Ti 0.10 Ni 0.50 alloys are 41.7%, 83.7% and 90.3%, respectively. At higher discharge current density of 1200 mA g −1 , the HRD values are 26.7%, 34.8% and 46.2%, respectively.
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高影响因子
ELECTROANALYSIS
·
2010
·Vol. 22
·期 10
·1136-1142
·
IF 2.63
Huanshun Yin,Yunlei Zhou,Shiyun Ai,Lin Cui,Lusheng Zhu
A glassy carbon electrode (GCE) modified with Mg-Al-SDS hydrotalcite-like clay (SDS-HTLC) was used for the sensitive voltammetric determination of 2-nitrophenol (2-NP) utilizing the oxidation process. The results indicate the prepared modified electrode has an excellent electrocatalytic activity toward 2-NP oxidation, lowering the oxidation overpotential and increasing the oxidation current. Under optimal conditions, the oxidation current was proportional to 2-NP concentration in the range from 1.0×10 −6 to 6.0×10 −4 M with the detection limit of 5.0×10 −7 M by DPV ( S / N =3). The fabricated electrode was applied for 2-NP determination in water samples and the recovery for these samples was from 95.6 to 103.5%.
研究领域:
电分析化学
·
环境监测
·
传感器与生物传感器
·
水质分析
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PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
·
2024
·
IF 1.3
Wenbin Jin,Nan Liu,Fang Cheng,Zongqing Ma,Yongchang Liu,Pingzhan Si,Hongliang Ge
We report the C substitution effects in MgB 2 bulks on the lattice parameters, FWHM, and critical current density ( J c ) as a function of doping level. It is shown that using carbon-coated boron powder can effectively control the grain growth of MgB 2 during the whole sintering process. Accompanied by the rapid cooling process, the final average grain size can be restrained within merely 50 nm, and the J c value of the sample can be significantly improved at high field. On top of that, adding Cu is also considered a key factor in improving the current carrying property of the graphene-doped sample throughout the whole field, which can be attributed to the formation of the MgCu 2 alloy phase.
研究领域:
材料科学
·
超导体研究
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高影响因子
Materials Today Nano
·
2021
·
IF 8.109
P. Zhang,C. Xie,G. Han,Q. Zhu,L. Chen,M. Jin,Q. Liu,Y. Zhou,Q. Sun,J. Xie
Chemical/electrochemical instability of LiCoO 2 (LCO) at high voltage limits its deliverable capacity and thereby energy density of the battery , although it has a high theoretical capacity of 274 mAh/g. In this study, stable cycling of LiCoO 2 at a voltage as high as 4.55 V can be achieved by simultaneous lattice doping with Mg (LMCO) and surface coating with a NASICON-type Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 (LATP) solid-state electrolyte. Uniform coating can be realized by a facile Pechini route combined with solid-phase calcination . The LCO with 4 wt% LATP coating and 2 at% Mg doping (4 wt% LATP/LMCO-0.02) can deliver a high capacity of 204 mAh/g in the voltage range of 3.0–4.55 V (vs. Li/Li + ) at 0.4C. After 300 cycles at 0.4C, the 4 wt% LATP/LMCO-0.02 material can maintain 86.2% of its initial capacity, significantly superior to those of undoped and/or uncoated materials. The results show that both doping and coating are critical in inhibiting structural change of LCO and electrolyte decomposition at a deeply charged state of LiCoO 2 material.
研究领域:
材料科学
·
电化学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Songlin Wang,Nan Jiang,Yanyan Liu,Yan Hao,Qiying Zhang,Hongying Niu,Jianji Wang
Methyl phenyl carbonate (MPC) is a versatile carbonate, particularly as an important component in the lithium-ion battery industry. Recently the green synthesis of carbonates from non-toxic feedstocks and efficient catalysts have attracted a considerable amount of interest but the development of a highly active catalyst for this synthesis is a great challenge. Herein, novel Pb-Mg thin nanosheet catalysts with high specific areas and large pore volumes were developed by one-pot hydrothermal approach for the synthesis of MPC without using any solvent. The nanosheets were thoroughly characterized by SEM-EDS, TEM , XPS , NH 3 -TPD, XRD , BET, and H 2 -TPR techniques. It is shown that a diphenyl carbonate (DPC) conversion of 56.6% and an MPC selectivity of 98.8% are achieved by a Pb-Mg nanosheet catalyst with 15 wt% Pb. The activity and selectivity values are significantly higher than the previous best value reported by using transition metal-based catalysts. After the reaction, the nanosheets can be separated by simple centrifugation and can be reused many times without a significant loss of catalytic activity, showing excellent stability and recyclability. A possible mechanism was investigated based on these results. This work provides new insight into accomplishing the efficient and green synthesis of MPC and offers a strategy for synthesizing other asymmetric carbonates.
研究领域:
化学工程
·
材料科学
·
催化化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wenjie Zhao,Yujie Zhang,Haomiao Li,Yi Shen,Kangli Wang,Kai Jiang
Rechargeable Mg batteries with the merits of low cost, high safety and environmental compatibility are deemed as promising energy storage techniques for large-scale applications. However, the actual development of rechargeable Mg batteries is constantly hindered by the difficulty of finding suitable electrode materials to accommodate Mg 2+ . Cu 2-x Se has exceptionally high electrical conductivity and its unique crystal structure could be better compatible with Mg 2+ cations. Herein, a novel Cu 2-x Se hollow nanocube with extraordinarily high conductivity and unique structure was designed and synthesized by facile one-step template-directed selenation reaction methods. The excellent Mg electrochemical performance of Cu 2-x Se hollow nanocube cathodes was demonstrated based on rechargeable Mg batteries. The Cu 2-x Se NCs provide a high specific capacity of 232.5 mAh g - 1 at 100 mA g - 1 , superior cycling stability over 3700 cycles, and an excellent rate capacity of 163.1 mAh g - 1 at 3000 mA g - 1 . Furthermore, the two-step magnesiation/demagnesiation processes of the Cu 2-x Se NC cathodes were revealed, and the accelerating effects of the fast Mg 2+ diffusion in the unique hierarchical structure on magnesium storage performance were analyzed. The outcomes of this study not only provide simple methods for fabricating high-performance Cu 2-x Se cathodes but also propose valuable insights for exploring conversion-type Mg-storage materials.
研究领域:
材料科学
·
电化学
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.3
Pengcheng Jing,Atsushi Inoishi,Chengcheng Zhao,Eiichi Kobayashi,Yisong Han,Duncan H. Gregory
Magnesium ion batteries (MIBs) offer promising solutions for next-generation sustainable energy storage systems owing to their intrinsic safety and cost-effectiveness, yet their development is hindered by the scarcity of high-capacity cathode materials, primarily due to poor magnesium ion transport and a limited number of electrochemically active sites. Here, we report a significant performance breakthrough in a structurally and electrochemically distinct, underexplored quasi-1D pseudolayered titanium trisulfide (TiS3) cathode through interlayer engineering and exploitation of dual cationic/anionic redox chemistry. In operando and ex situ characterization reveal that interlayer expansion, induced by the intercalation of 1-butyl-1-methylpyrrolidinium (BMPyrr+), weakens electrostatic interactions within the sulfide sublattice, enhances magnesium ion diffusion kinetics, and increases accessible redox sites. These modifications activate reversible Ti4+/Ti3+ and S22–/S2– redox couples, complemented by nanosizing-induced pseudocapacitance, synergistically underpinning the exceptional electrochemical performance. As a result, the expanded TiS3 cathode delivers outstanding reversible capacities (up to 300 mA h g–1 at 100 mA g–1), excellent rate performance (181 mA h g–1 at 1000 mA g–1), and long-term cycling stability, surpassing its pristine counterpart and many state-of-the-art MIB cathodes. This work underscores the combined role of interlayer engineering and dual-ion redox chemistry in advancing multivalent energy storage and introduces pseudolayered TiS3 as a new structural platform beyond conventional layered sulfides.
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DOI
PubMed
高影响因子
ACS Nano
·
2026
·
IF 17.3
Zhang Huan,Liu Minrui,Zhou Zhongqin,Ye Pengfei,Wen Lingyi,Feng Quanqing,Song Ningning,Wang Yanyun,Ma Guohang,Sun Ran,Zhang Kun,Wu Qihong,Zhang Meng,Wang Yining,Guo Yingkun,Fan Haiming
Accurate
magnetic resonance imaging (MRI) of microvascular
occlusive
diseases, exemplified by subsegmental pulmonary embolism (SSPE), remains
a clinical challenge because of the intrinsic limitations of clinically
available Gd-based small molecular contrast agents (CAs). Ultrasmall
iron oxide nanoparticles (USIOs)-based CAs have emerged as promising
alternatives, offering adjustable MRI T 1 relaxivity, favorable pharmacokinetics, and high biocompatibility;
however, their performance is critically hampered by inefficient atomic
utilization for MR T 1 relaxivity enhancement.
Herein, we report Mg-doped USIOs MRI CAs with high atomic utilization
efficiency, where incorporating a biocompatible Mg dopant into surface
octahedral-site Fe vacancies substantially boosts the T 1 relaxivity, enabling accurate detection of SSPE-associated
structural and perfusion abnormalities. The Mg 0.03 -USIOs
exhibit a 261-fold enhancement of T 1 relaxivity
contribution by the Mg dopant, achieving an exceptionally high T 1 relaxivity of 12.6 mM −1 s −1 . Such a high atomic utilization efficiency could
stem from the promoted spin polarization and ferromagnetic spin alignment
through the surface Mg doping, which considerably boosts the magnetic
moment and outer-sphere relaxation contribution. Further in vivo MRI studies in a pig SSPE model demonstrated that the
Mg 0.03 -USIOs enabled visualization of structural and perfusion
abnormalities in SSPE, far surpassing the capabilities of Gd-based
CAs. In vivo biosafety assessment in the pig model
confirmed the high biocompatibility of Mg 0.03 -USIOs. Our
findings provide a highly efficient doping strategy to construct high-performance
USIOs-based T 1 CAs for sensitive MRI of
microvascular structural and functional abnormalities.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Bofan An,Hui Ye,Xuefen Wang
As the global population of chronic kidney disease (CKD) patients continues to expand, high-performance adsorbents for uremic toxins have emerged as a critical solution to alleviate dialysis treatment challenges. In this work, a layered double hydroxide (Mg–Al LDH) was prepared via a facile hydrothermal approach and subsequently functionalized for adsorption of protein-bound toxins by organosilicon quaternary ammonium salt (Q-Mg–Al LDH). The synthesized Q-Mg–Al LDH was then incorporated into sodium alginate (SA) solution to achieve a three-dimensional Q-Mg–Al LDH/SA composite aerogel (SA-Q) by freeze-drying for easy maneuverability as adsorbents. Specifically, the organosilicon quaternary ammonium-grafted LDH (Q-Mg–Al LDH) offered both long alkyl chain and positively charged quaternary ammonium moieties, enabling synergistic adsorption through electrostatic and hydrophobic interactions, thereby exhibiting superior adsorption capacity (222.7 mg/g) for hippuric acid (HA, one typical protein-bound uremic toxin). The optimized SA-Q possessed outstanding adsorption capabilities (141.8 mg/g); more importantly, it could maintain a 95% removal rate even after 8 cycles, and also could selectively remove the diffused HA in the dialysate during hemodialysis, indicating its excellent operability and recyclability. This work demonstrated a promising strategy for constructing advanced adsorbents to eliminate uremic toxins from dialysate to facilitate the development and popularization of miniaturized hemodialysis equipment.
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高影响因子
Tungsten
·
2026
·
IF 9
Yu Miao,Wang Shilong,Zhang Dehao,Bi Xiaoman,Zhang Li,Zhang Linlin
The simultaneous enhancement of capacity, rate capability, and cycling stability is crucial for developing supercapacitor electrode material. In this work, Mg-doped NiCoP nanoflowers (MNCP) grown on graphene hydrogel (MNCP-GH) are fabricated on a Ni foam substrate (MNCP-GH/NF). The MNCP-GH/NF electrode offers abundant active sites, good conductivity, and structural stability. As a Lewis acid, the Mg ion can modulate the electron distribution around NiCoP, thereby raising the oxidation state of the active metal centers and further increasing the number of redox-active sites. GH with hierarchical pores and a large surface area endows a high MNCP-GH loading of 8.0 mg cm −2 . In addition, the conductive GH skeleton not only acts as a robust and conductive support for immobilizing MNCP nanoflowers but also establishes an interconnected electron transport pathway and facilitates rapid ion diffusion. Consequently, the MNCP-GH/NF electrode achieves excellent areal and mass-specific capacities of 10,560 mC cm −2 and 1320 C g −1 at 2 mA cm −2 . Remarkably, an excellent capacity retention of 73.2% at 100 mA cm −2 exhibits its outstanding rate performance. The assembled solid-state MNCP-GH/NF||polyvinyl alcohol-potassium hydroxide (PVA-KOH)||GH/NF supercapacitor delivers an energy density of 53.7 Wh kg −1 (4.3 mWh cm −3 ) and a power density of 18,749 W kg −1 (1499 mW cm −3 ). Moreover, the assembled device also maintains 85.7% of its original capacitance after 10,000 cycles. It is a promising and versatile strategy for designing bifunctional cathodes toward long-term stability and high energy storage. Graphical
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2026
·
IF 6.4
Menghan Li,Qianqian Zhang,Zhiying Lin,Qingcai Cai,Lu Luo,Jiawei Qiang,Jiuping Rao,Mizi Fan,Weigang Zhao,Qinzhi Zeng
Bamboo biomass was valorized into functional carbon microspheres for electrode design. • Bamboo-derived carbon induced self-assembly of Ni–Co–Mg hydroxide nanostructures. • Mg incorporation strengthened the LDH–carbon interaction and structural stability. • The optimized NCM@BC-20 electrode delivers 1226.8 F g −1 at 1 A g −1 . • The assembled ASC achieves 63.16 Wh kg −1 with 89.1% retention after 6000 cycles. Bamboo is an abundant and fast-growing lignocellulosic resource with considerable potential as a sustainable precursor for functional carbon materials. In this work, bamboo-derived carbon microspheres were employed to induce the self-assembly of Mg-modulated Ni-Co layered hydroxide heterostructures, forming a hierarchical composite electrode denoted as NCM@BC. During synthesis, the carbon microspheres acted not only as conductive supports but also as heterogeneous nucleation sites for hydroxide growth, leading to an open architecture that facilitated electrolyte penetration and charge transport. Meanwhile, Mg incorporation regulated the local coordination environment of the Ni-Co hydroxide phase and improved the structural stability of the layered framework during repeated redox reactions. As a result, the optimized NCM@BC-20 electrode delivered a specific capacitance of 1226.8 F g −1 at 1 A g −1 with favorable rate capability. Furthermore, the assembled asymmetric supercapacitor, using NCM@BC-20 as the positive electrode and activated carbon as the negative electrode, operated over a 1.6 V voltage window, achieved an energy density of 63.16 Wh kg −1 at 800 W kg −1 , and retained 89.1% of its peak capacitance after 6000 cycles. These results demonstrate that bamboo biomass can be converted into a value-added carbon component that not only directs heterostructure formation but also contributes to enhanced electrochemical performance, providing a practical route for the development of sustainable carbon-based electrode materials. Download: Download high-res image (228KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Ying Zhang,Ruohan Li,Wenying Sun,Wei Mao,Yibing Li,Lixun Zhang,Yuntao Guan
The pervasive contamination of tetrabromobisphenol A (TBBPA) presents a critical environmental challenge due to its persistence and resistance to conventional degradation. Although sulfidized nanoscale zero-valent iron (S-nZVI) represents a promising remediation avenue, its efficacy is severely constrained by particle agglomeration and insufficient mineralization capabilities. Here, we report a self-dissociation-assembly strategy to engineer a robust S-nZVI composite supported on Mg Al layered double oxides (S-nZVI@LDO) for the substantial removal of TBBPA. By modulating the precursor synthesis pathways, we demonstrate that the hydrothermal-derived LDO support (α-phase) creates a unique nanosheet architecture that facilitates superior dispersion of reactive Fe/S species compared to chemically precipitated counterparts. The optimized S-nZVI@LDO α composite achieves >95% TBBPA removal efficiency, with a debromination efficiency of 71% and a mineralization rate of 51%, significantly outperforming traditional composites. Mechanistic investigations reveal a synergistic pathway involving rapid electrostatic adsorption, reductive debromination driven by surface-bound Fe 0 , and oxidative mineralization via in-situ generated radicals. Furthermore, the catalyst exhibits improved stability and reusability over multiple cycles. This work elucidates the critical role of precursor structural evolution in catalyst design and provides a scalable, high-efficiency solution for the remediation of halogenated organic pollutants.
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