Acknowledgement

This study has been carried out as a part of the New Sunshine Program of the Agency of Industrial Science and Technology (AIST), Ministry of International Trade and Industry (MITI), under a contract with the New Energy and Industrial Technology Development Organization (NEDO) and in a shared work in the Technology Research Association for Molten Carbonate Fuel Cell Power Generation System. The authors appreciate their advice and support.

Progress of MCFC Stack Technology at Toshiba

M.Hori, T. Hayashi, and Y. Shimizu Toshiba Corporation 1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo 100, Japan

Introduction

Toshiba is working on the development of MCFC stack technology; improvement of cell characteristics, and establishment of separator technology. For the cell technology, Toshiba has concentrated on both the restraints of NiO cathode dissolution and electrolyte loss from cells, which are the critical issues to extend cell life in MCFC, and great progress has been made. On the other hand, recognizing that the separator is one of key elements in accomplishing reliable and cost-competitive MCFC stacks, Toshiba has been accelerating the technology establishment and verification of an advanced type separator. A sub-scale stack with such a separator was provided for an electric generating test, and has been operated for more than 10,000 hours. This paper presents several topics obtained through the technical activities in the MCFC field at Toshiba.

l.Cell Technologies

Fig.l shows the progress of single-cell performances since 1990 at Toshiba. By taking a few countermeasures to restrain the NiO cathode dissolution and the electrolyte loss, great progress has been made in the improvement of cell performance since 1992.

1990 (Tile)

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