Li-storage and cyclability of urea combustion derived ZnFe2O4 as anode for Li-ion batteries

被引：237

作者：

Sharma, Yogesh ^{[1
]}

Sharma, N. ^{[1
]}

Rao, G. V. Subba ^{[1
]}

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

机构：

[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

来源：

ELECTROCHIMICA ACTA | 2008年 / 53卷 / 05期

关键词：

ZnFe2O4 spinel structure; anode material; Li-ion batteries; Li-storage;

D O I：

10.1016/j.electacta.2007.09.059

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The cubic ZnFe2O4 with the spinel structure is prepared by the urea combustion method. Powder X-ray diffraction and HR-TEM studies confirm the single-phase nature with particle size in the range, 100-300 rim. A stable and reversible capacity, 615(+/- 10) mAh g(-1) (5.5 moles of Li per mole of ZnFe2O4) when cycled in the range, 0.005-3.0 V vs. Li at a current of 60 mA g(-1) (0.1C) has been achieved between 15 and 50 cycles. The underlying reaction mechanism contributing to the observed capacity is the combination of 'de-alloying-alloying' and 'conversion' reactions of 'LiZn-Fe-Li2O composite'. Ex situ HR-TEM and SAED data on the charged-electrode confirmed the proposed reaction mechanism. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2380 / 2385

页数：6

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