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المؤلفNisar U.
المؤلفShakoor R.A.
المؤلفEssehli R.
المؤلفAmin R.
المؤلفOrayech B.
المؤلفAhmad Z.
المؤلفKumar P.R.
المؤلفKahraman R.
المؤلفAl-Qaradawi S.
المؤلفSoliman A.
تاريخ الإتاحة2019-11-03T11:47:37Z
تاريخ النشر2018
اسم المنشورElectrochimica Acta
المصدرScopus
الرقم المعياري الدولي للكتاب134686
معرّف المصادر الموحدhttp://dx.doi.org/10.1016/j.electacta.2018.09.111
معرّف المصادر الموحدhttp://hdl.handle.net/10576/12205
الملخصNa4MnV(PO4)3 is a sodium ion conducting material with a NASICON type crystal structure. This phase is not much known as an electrode material. The present work focuses on the sodium ion intercalation/de-intercalation mechanism and charge/discharge behavior of the material. The Na4MnV(PO4)3 is synthesized through a sol-gel process and characterized by XRD, SEM, and XPS. The structural analysis confirms the formation of a phase pure crystalline material with nanometric particle size which adopts a trigonal crystal structure. Galvanostatic intermittent titration technique (GITT) measurements indicate that Na4MnV(PO4)3 is electrochemically active having slanting voltage plateaus. Ex-situ and In-situ XRD analysis, as a function of sodium concentration, indicate that the intercalation/de-intercalation of sodium is associated with a single-phase reaction rather than a biphasic reaction when cycled between 1.5 and 4.5 V. The electrochemical measurements on composite electrodes, Na4MnV(PO4)3/CNTS (1 & 3 wt.%), show promising charge/discharge capacity (?140 mAh/g), good cyclability (100% capacity retention after 40 cycles) and reasonable rate capability. The cyclic voltammetry (CV) and X-ray Photoelectron Spectroscopy (XPS) analyses indicate that the main contributions towards the activity of Na4MnV(PO4)3 can be attributed to the active of Mn2+/Mn3+ and V3+/V4+ redox couple with partial activity of V4+/V5+. The obtained results suggest that Na4MnV(PO4)3 is a promising electrode material which can be achieved better rate performance with long cycling stability and battery performance through engineering of the particle morphology and microstructure.
راعي المشروعThe authors acknowledge the financial support from the Center for Advanced Materials (CAM), Qatar University, Doha, Qatar. The authors would also like to thank Mar�a J�uregui and Damien Saurel from XRD platform at CIC Energigune for her help for the in situ-XRD measurements. Appendix A
اللغةen
الناشرElsevier Ltd
الموضوعCathode materials
Charge/discharge capacity
Crystal structure
In-situ XRD analysis
Intercalation/de-intercalation
Sodium ion batteries
العنوانSodium intercalation/de-intercalation mechanism in Na4MnV(PO4)3 cathode materials
النوعArticle
الصفحات98 - 106
رقم المجلد292
dc.accessType Abstract Only


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