The past decade has observed rapid growth in the development of cobalt-free perovskite cathodes, which provide enhanced structure and operational stability at the operating temperature of intermediate temperature solid oxide fuel cells (IT-SOFC, 600-800°C) compared to its cobalt-containing counterpart. This Review aims to present a comprehensive overview on the status and advances of the existing cobalt-free perovskite cathodes for IT-SOFCs by discussing electrochemical behaviors, thermal expansion properties, stabilities as well as the oxygen ionic and the electronic transport properties of these cobalt-free perovskite cathode compositions, with primary emphasis on the relationship between the electrochemical performances and the materials science-related factors. Among various cobalt-free perovskite cathodes presented in this Review, niobium-doped compositions generally show lower polarization resistances relative to other cathode compositions.[a] Dr. performance and materials science-related factors. The review is divided into four sections. This first section justifies the SOFC technology significance and its context. The second section features the pertaining aspects on the development of cobaltfree perovskite cathodes according to electrochemical performance, chemical compatibility with electrolytes, thermal expansion mismatch, and overview of the composite perovskite cathodes. The third section provides comparative insights into the performances of single, double, and composite cobalt-free perovskite cathodes focusing into thermal and electrochemical parameters, i. e., thermal expansion coefficient (TEC), total electrical conductivity, polarization resistance and its corresponding activation energy. Synthesis routes, lattice cell parameters, oxygen content, and other available data are also included. The fourth section, in turn, overviews, challenges and outlook for further research and development of cobalt-free perovskite cathodes and concludes the review.