Modified synthesis of [Fe/LiF/C] nanocomposite, and its application as conversion cathode material in lithium batteries

被引：46

作者：

Prakash, Raju ^{[1
]}

Wall, Clemens ^{[1
]}

Mishra, Ajay Kumar ^{[1
]}

Kuebel, Christian ^{[1
]}

Ghafari, Mohammad ^{[1
]}

Hahn, Horst ^{[1
]}

Fichtner, Maximilian ^{[1
]}

机构：

[1] KIT, Inst Nanotechnol INT, D-76021 Karlsruhe, Germany

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 14期

关键词：

Ferrocene; Metal fluoride; Lithium-ion battery; Carbon nanotube; Pyrolysis; Conversion cathode material; METAL FLUORIDE NANOCOMPOSITES; HIGH-CAPACITY; ELECTRODE MATERIALS; ION BATTERIES; HIGH-POWER; LI; PERFORMANCE; STORAGE;

D O I：

10.1016/j.jpowsour.2011.03.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In an attempt to enhance the energy storage capacity and discharge voltage, a new cathode material based on ferrocene and LiF for lithium-ion batteries has been explored [Fe/LiF/C] nanocomposite (1) has been synthesized by pyrolysis of a ferrocene/LiF mixture at 700 degrees C using a rotating quartz tube setup in a furnace. The structure and morphology of the composite were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), Brunauer-Emmer-Teller (BET) analysis, Raman, and Mossbauer spectroscopy. The nanocomposite is composed of well-defined nanotubes which are interlinked by graphitic shell-type structures containing uniformly distribution of Fe, Fe-C, and LiF nanoparticles. The binder-free nanocomposite cathode showed enhanced electrochemical performance with the reversible specific capacity of 230 mAh g(-1) (1.3-4.3 V) at 20.8 mAg(-1) at room temperature. It exhibited a remarkable cyclic stability and good rate capability performances. The morphology of 1 was changed by ball milling, and the resulting nanocomposite 2 did not show any cyclic stability as a cathode. Thus, the cyclic stability and rate capability performances of 1 were attributed to its structure and morphology. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：5936 / 5944

页数：9

共 32 条

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