Synthesis, characterization, DC-electrical conductivity and γ-ray effect on Ag1+, Y3+ double doped nano lithium manganates (LiMn2−2x Ag x Y x O4) for rechargeable batteries

• Autorzy: Abou-Sekkina M. M , Saad F A , El-Metwaly F G , Khedr A. M.

Identyfikatory

DOI

10.2478/s13536-014-0205-1

• Języki publikacji: EN

Abstrakty

EN

Pristine lithium manganate (LiMn2O4) and Ag1+, Y3+ double doped nano lithium manganate [LiMn2−2x Ag x Y x O4, (x = 0.025, 0.05)] spinels were synthesized via a coprecipitation method for rechargeable batteries applications. The synthesized LiMn1.9Ag0.05Y0.05O4 was exposed to different doses of γ-irradiation (10 and 30 kGy). The resulting spinel products were characterized by using thermogravimetric and differential thermal analysis (TG/DTA), X-ray diffraction (XRD), infrared (IR) spectroscopy, scanning electron microscopy (SEM), energy dispersive analysis of X-rays (EDAX), electronic (UV-Vis) and electron spin resonance (ESR) spectra. LiMn2O4 exhibited a discharge capacity of 124 mAhg−1 while LiMn1.9Ag0.05Y0.05O4 had discharge capacities of 129 and 137 mAhg−1 for non irradiated and γ-irradiated (30 kGy) samples, respectively. The effects of the dopant cations and γ-irradiation on the discharge capacity and DC-electrical conductivity of some synthesized spinels were studied.

Słowa kluczowe

EN

nano lithium manganates; Ag1+Y3+ double doped; g-ray effect

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2014
• Tom: Vol. 32, No. 3
• Strony: 315--323
• Opis fizyczny: Bibliogr. 33 poz., rys., tab., wykr.

Twórcy

autor

Abou-Sekkina M. M

• Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt

autor

Saad F A

• Chemistry Department, College of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia

autor

El-Metwaly F G

• Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
• Chemistry Department, Faculty of Science, Jazan University, Jazan, Saudi Arabia

autor

Khedr A. M.

• Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
• Chemistry Department, College of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia

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