Mukhopadhyay, Madhumita and Mukhopadhyay, Jayanta and Das Sharma, Abhijit and Basu, Rajendra Nath (2009) Ball mill assisted synthesis of Ni-YSZ cermet anode by electroless technique and their characterization. Materials science and Engineering B-Advanced Functional Solid-StateMaterials, 163 (2). pp. 120-127. ISSN 0921-5107

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Abstract

Ni-YSZ composite cermet used as the anode material for solid oxide fuel cell is prepared by electroless technique involving an important sensitization process of YSZ. In the present investigation, the sensitization process of YSZ is carried out through cost-effective controlled ball milling. The effect of milling speed on electrical, thermal and microstructural properties of such anodes is investigated and optimized at 45 rpm. Microstructural analysis of the synthesized Ni-YSZ cermets prepared under the optimized milling conditions showed a core-shell microstructure with YSZ as core and fine metallic Ni particulates as the shell. The interconnected metallic Ni creates a conductive pathway at room temperature. Such type of unique core-shell anode cermet, results in higher electrical conductivity (sigma(800 degrees C) similar to 500 S/cm) at much lower Ni content (similar to 33 vol%) compared to conventional anode cermet with thermal expansion coefficient (similar to 11.48 x 10(-6) K(-1)) compatible to other cell components. (C) 2009 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Solid oxide fuel cell; Anode; Cermet; Ball milling; Electroless; Core-shell
Subjects:	Ceramic-Metal Systems
Divisions:	Fuel Cell and Battery
Depositing User:	Bidhan Chaudhuri
Date Deposited:	29 Feb 2012 11:16
Last Modified:	29 Feb 2012 11:16
URI:	http://cgcri.csircentral.net/id/eprint/1059

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