In our country, about 60% of the power generated in India is from fossil fuels such as coal, oil and gas, which are eventually responsible for generating large quantities of greenhouse gases. Fuel cell is an electrochemical device and potential technology to generate power in an environmentally benign manner. This chapter of the monogram deals with high temperature ceramic fuel cells, popularly known as solid oxide fuel cell (SOFC). In the beginning, a generalized discussion has been made about fuel cells with particular emphasis on SOFC which is followed by a detailed description of the progress of research related to the development of planar anode-supported SOFC technology that is being pursued at CSIR-Central Glass & Ceramic Research Institute, Kolkata under CSIR-New Millennium Indian Technology Leadership Initiative (NMITLI) programmes over the last few years. Under these technological developmental activities, large numbers of anode-supported single cells of dimension up to 10 cm × 10 cm × 1.5 mm have been fabricated that show reasonably good power output of ~1.0 W/cm 2 at a cell voltage of 0.7 V and at an operating temperature of 800 o C. In parallel, this contribution also describes the indigenous development of high temperature glass-based sealant, an essential component for SOFC stacking. Using the developed 10 × 10 single cells, glass-based sealants, indigenously designed and fabricated metallic interconnect and gas manifolds, several SOFC short stacks (up to10 cells) have been fabricated and demonstrated for the first time in our country.