Synthesis, structure, and electrochemical properties of a new cathode material, LiFeO2, with a tunnel structure
Synthesis, structure, and electrochemical properties of a new cathode material, LiFeO2, with a tunnel structure
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DOI：
10.1149/1.1516769
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发表时间：
2002-12-01
影响因子：
3.9
通讯作者：
Takano, M
中科院分区：
文献类型：
--
作者：
Matsumura, T;Kanno, R;Takano, M
以β-FeOOH和LiOH.OH2O为主体材料，通过离子交换反应合成了具有隧道结构的新型锂铁氧化物LiFeO2，并对其正极性能进行了测试。离子交换反应是通过与不同醇的溶剂热反应进行的，在110℃下得到了反应的新相。其结构由Rietveld分析的X射线衍射法确定，具有霍兰特型隧道结构。由新的LiFeO2正极和锂阳极组成的锂电池在1.5~4.5V的电压范围内表现出良好的充放电可逆性。通过X射线衍射结果、穆斯堡尔谱和电化学测试对锂的嵌入和脱嵌机理进行了表征。(C)2002年电化学会。
A new lithium iron oxide, LiFeO2, with a tunnel structure was synthesized by an ion exchange reaction between the host material, beta-FeOOH, with LiOH.OH2O, and its cathodic properties for lithium cells were examined. The ion exchange reaction was carried out by solvothermal reactions using various alcohols and the new phase was obtained for the reaction at 110degreesC. Its structure, determined by X-ray diffraction measurements using Rietveld analysis, has the hollandite-type tunnel structure. Lithium cells consisting of the new LiFeO2 cathodes and lithium anodes showed good charge and discharge reversibility in the voltage range, 1.5 to 4.5 V. The lithium intercalation and deintercalation mechanism was characterized using X-ray diffraction results, Mossbauer spectroscopy, and electrochemical measurements. (C) 2002 The Electrochemical Society.