With the wide application of nuclear energy, the problem of radioactive pollution has attracted worldwide attention, and the research on the treatment of radioactive wastewater is imminent. How to treat radioactive wastewater deeply and efficiently has become the most critical issue in the development of nuclear energy technology. The radioactive wastewater produced after using nuclear technology has the characteristics of many kinds, high concentration, and large quantity. Therefore, it is of great significance to study the treatment technology of radioactive wastewater in reprocessing plants. The process flow and waste liquid types of the post-treatment plant are reviewed. The commonly used evaporation concentration, adsorption, precipitation, ion exchange, biotechnology, membrane separation, and photocatalysis are summarized. The basic principles and technological characteristics of them are introduced. The advantages and disadvantages of different single and combined processes are compared, and the development trend of future processing technology is prospected.

Reversible solid oxide fuel cell (RSOFC) is an energy device that flexibly interchanges between electrical and chemical energy according to people’s life and production needs. The development of cell materials affects the stability and cost of the cell, but also restricts its market-oriented development. After decades of research by scientists, a lot of achievements and progress have been made on RSOFC materials. According to the composition and requirements of each component of RSOFC, this article summarizes the research progress based on materials and discusses the merits and demerits of current cell materials in electrochemical performance. According to the efficiency of different materials in solid oxide fuel cell (SOFC mode) and solid oxide electrolyzer (SOEC mode), the challenges encountered by RSOFC in the operation are evaluated, and the future development of RSOFC materials is boldly prospected.

The polarization resistance optimization of the cathode plays a crucial role in reducing the energy consumption of the solid oxide fuel cell (SOFC) stack. Herein, a (Cu,Mn)₃O₄ spinel material is used for the development of the cathode current‐collecting layer (CCCL) because it has superior price and good electrical conductivity than conventional current‐collecting materials. Symmetrical cells are fabricated using screen printing techniques. It is optimized by studying the influence of sintering temperature, thickness, and adding amount of Co₃O₄ on the microstructure and polarization resistance of the CCCL. The research found that 850 °C is the most convenient sintering temperature and 1–2 wt% of the adding amount of Co₃O₄ can optimize the polarization resistance. In addition, it is found that for the cathode side, the total thickness of the CCCL and the cathode should be controlled between 70 and 80 μm, the performance of the cathode is stable, and the polarization resistance is also rationally optimized.