Spontaneous Magnetic Transitions and Corresponding Magnetoelastic Properties of Intermetallic Compounds RMn2Ge2 (R=Gd, Tb and Dy)

Zhang, Guangfu; Tian, Ye; Deng, Ying

doi:10.1007/s11595-018-1861-5

Cited by 4 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with recently reported RT NaS batteries, the rate performance of our S@HPC/Mo 2 C composite is still superior, as shown in Figure 4d. [ 7b,8e,12,22,23 ] Moreover, a stable and high capacity of 503 mAh g −1 is maintained even after 800 cycles at 5 A g −1 , indicating the excellent cycling stability of the S@HPC/Mo 2 C electrode. In contrast, the S@HPC and S@PC show rapid capacity decay in the first 50 cycles and operate at the low value of <320 mAh g −1 .…”

Section: Resultsmentioning

confidence: 97%

A High‐Efficiency Mo₂C Electrocatalyst Promoting the Polysulfide Redox Kinetics for Na–S Batteries

Zhou

Yao

et al. 2022

Advanced Materials

View full text Add to dashboard Cite

of RT Na-S batteries. First, S cathode is the intrinsic electronic insulator (5 × 10 −30 S cm −1 ), which leads to large polarization and low sulfur utilization. [3] Second, the enormous volume change (170%) during sodiation and desodiation cause the pulverization of S cathode, resulting in a continuous decline of capacity. [4] Third, the dissolution of the sodium polysulfide intermediates (NaPSs) results in severe shuttle effect and sluggish reaction kinetics. [5] To address these limitations, some rational strategies have been proposed to improve the electrochemical performance of S cathode. Developing nanostructured carbon hosts with different pore structures, [4,6] heteroatoms (e.g., B, N, O, P, S), [7] singleatom and metal clusters (e.g., Co, Cu, Ni), [8] optimizing the electrolyte composition to reduce the dissolution of NaPSs and modifying the separator to block the diffusion of NaPSs have been proved to be effective methods to boost the cycling performance of RT Na-S. [2b,9] However, these strategies do not fundamentally solve the intractable issue of NaPSs dissolution. Hiking up the transformation rate of intermediate NaPSs toward Na 2 S 2 /Na 2 S via effective catalysts is foremost.Catalytic transformation of NaPSs by polar hosts (e.g., oxides, nitrides, sulfides, selenides, etc.) is the most powerful approach to improve the electrochemical performance of sulfur cathodes. [7a,10] For example, Xue et al. prepared hollow CoS 2 as a polar catalyst for RT Na-S, which could promote the transformation of NaPSs and inhibit the dissolution, displaying a high capacity of 349 mAh g −1 at 3 C and long cycling life over 800 cycles. [11] Cao et al. combined the high electrical Room-temperature sodium-sulfur (RT Na-S) batteries, as promising nextgeneration energy storage candidates, are drawing more and more attention due to the high energy density and abundant elements reserved in the earth. However, the native downsides of RT Na-S batteries (i.e., enormous volume changes, the polysulfide shuttle, and the insulation and low reactivity of S) impede their further application. To conquer these challenges, hierarchical porous hollow carbon polyhedrons embedded with uniform Mo 2 C nanoparticles are designed deliberately as the host for S. The micro-and mesoporous hollow carbon indeed dramatically enhances the reactivity of the S cathodes and accommodates the volume changes. Meanwhile, the highly conductive dispersed Mo 2 C has a strong chemical adsorption to polysulfides and catalyzes the transformation of polysulfides, which can effectively inhibit the dissolution of polysulfides and accelerate the reaction kinetics. Thus, the as-prepared S cathode can display a high reversible capacity (1098 mAh g −1 at 0.2 A g −1 after 120 cycles) and superior rate performance (483 mAh g −1 at 10.0 A g −1 ). This work provides a new method to boost the performance of RT Na-S batteries.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202200479.

show abstract

Section: Resultsmentioning

confidence: 97%

A High‐Efficiency Mo₂C Electrocatalyst Promoting the Polysulfide Redox Kinetics for Na–S Batteries

Zhou

Yao

et al. 2022

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…In particular, the RE‐Mn‐X (X = Sn, Ge, Si, etc.) intermetallic compounds with special crystal structures and complex magnetic transitions, mainly resulting from the exchange interactions between 3d and 4f magnetism and the intralayer Mn–Mn exchange interaction, have been investigated extensively [5–11] . The intermetallic compounds REMn 2 X 2 with a ThCr 2 Si 2 ‐typed structure (e.g., HoMn 2 Ge 2 and DyMn 2 Si 2 ), REMnX with a TiNiSi‐typed or CeFeSi‐typed structure (e.g., DyMnGe), and REMn 6 X 6 with a HfFe 6 Ge 6 ‐type structure (e.g., DyMn 6 Ge 6 and TbMn 6 Sn 6 ) show interesting magnetic properties such as magnetocaloric effect and magnetoresistance effect in the industrial applications of superconducting technology and aerospace [8,12–17] .…”

Section: Introductionmentioning

confidence: 99%

Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems

Ye,

Wang,

Chen

et al. 2024

Materials Genome Engineering Advances

View full text Add to dashboard Cite

In this work, eight Mn‐RE (RE = Ce, Pr, Sm, Tb, Er, Tm, Lu, and Y) binary systems were reassessed thermodynamically by the CALPHAD method based on the reported optimizations and experimental information. Self‐consistent thermodynamic parameters to describe Gibbs energies of various phases in eight Mn‐RE binary systems were obtained. The calculated phase equilibria and thermodynamic properties of eight Mn‐RE binary systems are in good accordance with the experimental results. Furthermore, phase equilibria and thermodynamic properties of 13 Mn‐RE (RE = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Lu, and Y) binary systems were discussed systematically in combination with the present calculations and the reported optimizations. A trend was found for the variation of phase equilibria and thermodynamic properties of the Mn‐RE binary systems. In general, as the RE atomic number increases, the enthalpies of mixing of liquid alloys as well as the enthalpies of formation of the intermetallic compounds become increasingly negative, and the formation temperatures of the intermetallic compounds become higher. The results provide a complete set of self‐consistent thermodynamic parameters for the Mn‐RE binary systems, and a thermodynamic database of 13 Mn‐RE binary systems was finally achieved.

show abstract

Magnetic structure, magneto-caloric properties and magnetic critical behaviours of LaMn2Ge2 compounds

Wang

Hutchison

et al. 2022

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Spontaneous Magnetic Transitions and Corresponding Magnetoelastic Properties of Intermetallic Compounds RMn2Ge2 (R=Gd, Tb and Dy)

Cited by 4 publications

References 14 publications

A High‐Efficiency Mo₂C Electrocatalyst Promoting the Polysulfide Redox Kinetics for Na–S Batteries

A High‐Efficiency Mo₂C Electrocatalyst Promoting the Polysulfide Redox Kinetics for Na–S Batteries

Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems

Magnetic structure, magneto-caloric properties and magnetic critical behaviours of LaMn2Ge2 compounds

Contact Info

Product

Resources

About

Spontaneous Magnetic Transitions and Corresponding Magnetoelastic Properties of Intermetallic Compounds RMn2Ge2 (R=Gd, Tb and Dy)

Cited by 4 publications

References 14 publications

A High‐Efficiency Mo2C Electrocatalyst Promoting the Polysulfide Redox Kinetics for Na–S Batteries

A High‐Efficiency Mo2C Electrocatalyst Promoting the Polysulfide Redox Kinetics for Na–S Batteries

Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems

Magnetic structure, magneto-caloric properties and magnetic critical behaviours of LaMn2Ge2 compounds

Contact Info

Product

Resources

About

A High‐Efficiency Mo₂C Electrocatalyst Promoting the Polysulfide Redox Kinetics for Na–S Batteries

A High‐Efficiency Mo₂C Electrocatalyst Promoting the Polysulfide Redox Kinetics for Na–S Batteries