Synthesis, electrical and dielectrical properties of (LixNa1-x)6Mg(SO4)4 vanthoffite ceramics as new attractive electrode materials for Li- and Na-ion batteries

被引：8

作者：

Bejaoui, Abir ^{[1
]}

Souamti, Ahmed ^{[1
]}

Kahlaoui, Massoud ^{[2
]}

Diego Lozano-Gorrin, Antonio ^{[3
]}

Chehimi, Dalila Ben Hassen ^{[1
]}

机构：

[1] Univ Carthage, Fac Sci Bizerte, Dept Chim, Lab Applicat Chim Ressources & Substances Nat & E, Zarzouna 7021, Bizerte, Tunisia

[2] Univ Carthage, Fac Sci Bizerte, Lab Phys Mat, Unite Serv Common Spectrometre Surfaces, Zarzouna 7021, Bizerte, Tunisia

[3] Univ La Laguna, Dept Fis, San Cristobal la Laguna 38206, Spain

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2018年 / 228卷

关键词：

Vanthoffite ceramics; Na-Li ion batteries; Solid state method; Activation energies; CBH model; MAGNESIUM DEPOSITION; AC CONDUCTIVITY; ENERGY-STORAGE; LITHIUM; CO; CATHODE; TRANSPORT; FE; ELECTROCHEMISTRY; INSERTION;

D O I：

10.1016/j.mseb.2017.12.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

(LixNa1-x)(6)Mg(SO4)(4) ceramics denoted as LNMSx (x = 0.1, 0.3, 0.5, 0.7 and 1 mol%) were obtained via the solid state reaction method. The refinement of the structural parameters using the Fullprof software by the Rietveld method confirmed that the Li+ dopant can replace the sodium in this structure with a slight increase in the lattice parameters. The spectroscopic studies revealed the vibrational mode of the sulfate groups. Electrical conductivity, activation energies, modulus and dielectric properties were studied by impedance spectroscopy in the [553-733 K] temperature range. Results show that the materials present a semiconductor ionic character with 1D conduction by means of migration of cation mobile in the system. Conductivity decreases when the Li+ dopant content x increases. The electrochemical studies show that LNMSx (x = 0.5) has the highest electrical conductivity that can be proposed as a good electrolyte material for lithium or sodium batteries applications.

引用

页码：224 / 233

页数：10

共 63 条

[11] THE MAGNESIUM AND MAGNESIUM AMALGAM ELECTRODES IN APROTIC ORGANIC-SOLVENTS - A KINETIC-STUDY [J].