Manipulation of electrochemically (In)active elements in Na3VMg0.5Ti0.5(PO4)3 and Na3.5V0.5MgTi0.5(PO4)3: Enhancing the longevity of NASICON-type cathodes for sodium-ion batteries

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys Pub Date : 2025-09-02 DOI:10.1016/j.jma.2025.07.021

Vaiyapuri Soundharrajan, JunJi Piao, Subramanian Nithiananth, Vitalii Ri, Jung Ho Kim, Chunjoong Kim, Jaekook Kim

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Abstract

The sodium superionic conductor (NASICON)-type cathode, Na₃V₂(PO₄)₃ (NVP), is considered as a promising cathode material for sodium-ion batteries (SIBs), which offers stable sodium storage capability. However, hazardous and expensive vanadium (V) has limited its practical application. To reduce the V dependency in NASICON-type cathodes, two new NASICON-structured materials, Na₃VMg_0.5Ti_0.5(PO₄)₃ (N_3.0VMTP/C) and Na_3.5V_0.5MgTi_0.5(PO₄)₃ (N_3.5VMTP/C), were designed for cost-effectiveness as well as improvement of battery performance. N_3.0VMTP/C and N_3.5VMTP/C provided a sodium storage capacity of 155.84 mAh g⁻¹ and 105 mAh g⁻¹ at 12 mA g⁻¹ with 88 % and 84 % capacity retention after 500 cycles at 150 mA g⁻¹, respectively. In-situ XRD analysis revealed that both cathodes undergo a progressive solid solution reaction in the lower voltage region and two-phase reaction at higher voltages during (de)sodiation, with only minor difference in the degree of lattice displacement, confirming their high potential for the SIBs with sustainable and cheaper Mg for grid-scale utilization.

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Na3VMg0.5Ti0.5(PO4)3和Na3.5V0.5MgTi0.5(PO4)3中电化学（In）活性元素的操纵：提高钠离子电池nasiconon型阴极的寿命

钠超离子导体（NASICON）型阴极Na3V2(PO4)3 （NVP）具有稳定的储钠性能，是一种很有前途的钠离子电池（sib）正极材料。然而，钒的危害性和昂贵性限制了它的实际应用。为了降低nasicon型阴极对V的依赖性，设计了两种新型nasicon结构材料Na3VMg0.5Ti0.5(PO4)3 （N3.0VMTP/C）和Na3.5V0.5MgTi0.5(PO4)3 (N3.5VMTP/C)，以提高成本效益和电池性能。N3.0VMTP/C和N3.5VMTP/C在12 mA g - 1下的钠存储容量分别为155.84 mAh g - 1和105 mAh g - 1，在150 mA g - 1下循环500次后的容量保留率分别为88 %和84 %。原位XRD分析表明，两种阴极在（去）钠化过程中均发生了低压区递进式固溶体反应和高压区两相反应，晶格位移程度只有微小差异，证实了它们具有可持续和廉价Mg的sib的高潜力，可用于电网规模的利用。

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来源期刊

Journal of Magnesium and Alloys Engineering-Mechanics of Materials

CiteScore

20.20

自引率

14.80%

发文量

审稿时长

59 days

期刊介绍： The Journal of Magnesium and Alloys serves as a global platform for both theoretical and experimental studies in magnesium science and engineering. It welcomes submissions investigating various scientific and engineering factors impacting the metallurgy, processing, microstructure, properties, and applications of magnesium and alloys. The journal covers all aspects of magnesium and alloy research, including raw materials, alloy casting, extrusion and deformation, corrosion and surface treatment, joining and machining, simulation and modeling, microstructure evolution and mechanical properties, new alloy development, magnesium-based composites, bio-materials and energy materials, applications, and recycling.