Ln1-xAxCoO3 (Ln = Er, La; A = Ca, Sr)/Carbon Nanotube Composite Materials Applied for Rechargeable Zn/Air Bat
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- 作者：Anke Weidenkaff ; Stefan G. Ebbinghaus ; and Thomas Lippert
- 刊名：Chemistry of Materials
- 出版年：2002
- 出版时间：April 2002
- 年：2002
- 卷：14
- 期：4
- 页码：1797 - 1805
- 全文大小：1130K
- 年卷期：v.14,no.4(April 2002)
- ISSN：1520-5002
文摘
Calcium- and strontium-substituted rare earth cobaltate powders with the perovskitestructure (ABO3) are synthesized by coprecipitation, ceramic, complexation, and microemulsion processes. On these metal oxide particles, a carbon nanotube composite material wasprepared by a catalytic hydrocarbon dissociation reaction. The material was tested for apossible application as an oxygen electrode in zinc/air batteries. Through a systematiccharacterization of the produced materials, the common strategy of screening processes fornew materials can be replaced by the tailoring of an optimized functional material. To studythe influence of the synthesis route and substitution at the A site on the crystallographicstructure, the materials were characterized by X-ray diffraction (XRD) and electronmicroscopy (EM). Phase formation, reactivity, and stability were monitored by high-temperature X-ray diffraction and thermoanalytical (TA) experiments. The electrochemicalactivities of the samples for oxygen evolution was measured in a three-electrode arrangement.