Low temperature molten salt synthesis of Y2Sn2O7 anode material for lithium ion batteries

被引：20

作者：

Nithyadharseni, P. ^{[1
,2
]}

Reddy, M. V. ^{[1
,3
]}

Ozoemena, Kenneth I. ^{[2
,4
]}

Balakrishna, R. Geetha ^{[5
]}

Chowdari, B. V. R. ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Phys, Adv Batteries Lab, Singapore 117542, Singapore

[2] CSIR, Energy Mat Mat Sci & Mfg, ZA-0001 Pretoria, South Africa

[3] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore

[4] Univ Witwatersrand, Sch Chem, ZA-2050 Johannesburg, South Africa

[5] Jain Univ, Ctr Nano & Mat Sci, Kanakapura 562112, Bangalore Rural, India

来源：

ELECTROCHIMICA ACTA | 2015年 / 182卷

关键词：

Molten salt synthesis; Y2Sn2O7; Pyrochlore structure; Anode; Capacity retention; Electrochemical Impedance Spectroscopy; LI-CYCLING PROPERTIES; X-RAY-DIFFRACTION; NEGATIVE ELECTRODES; TIN OXIDES; PERFORMANCE; STORAGE; COMPOSITE; BEHAVIOR; SNO2;

D O I：

10.1016/j.electacta.2015.10.004

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

For the first time, yttrium tin oxide (Y2Sn2O7) compound is prepared at low temperature (400 degrees C) with cubic pyrochlore structure via molten salt method using KOH as a flux for their electrochemical applications. The final product is reheated at three different temperatures of 600, 800 and 1000 degrees C for 6 h in air, are physically and chemically characterized by various techniques such as X-ray diffraction (XRD), scanning electron microscope (SEM) and electrochemical studies of galvanostatic cycling (GC), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Galvanostatic cycling of Y2Sn2O7 compounds are carried out with three different current densities of 60, 100 and 250 mA g(-1) and the potential range of 0.005-1.0 V vs. Li. The EIS is carried out to study the electrode kinetics during discharge and charge at various voltages and corresponding variation of resistance and capacitance values are discussed. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：1060 / 1069

页数：10

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