Enhanced thermoelectric properties of Ca3Co4O9 by adding nano MoSi2

Hierarchically porous Ca3Co4O9 ceramics prepared by freeze casting: Emerging ultra‐low thermal conductivity and apparent anisotropy

“…The ρ value of the sample perpendicular to the freezing direction reached 6.07 mΩ·m. By comparison, the electrical resistivity of porous Ca 3 Co 4 O 9 ceramics prepared by the freeze‐casting method was 15–50 times larger than that of the other works 13,26–29 …”

“…By comparison, the electrical resistivity of porous Ca 3 Co 4 O 9 ceramics prepared by the freeze-casting method was 15-50 times larger than that of the other works. 13,[26][27][28][29] In addition, a positive Seebeck coefficient was obtained and reflected a p-type semiconductor. It is noted that the samples revealed a relatively high S value (232.3 µV/K).…”

High ZT Value and Ultralow Lattice Thermal Conductivity Induced by Edge Dislocations Coupled with the Superlattice Structure in Ag-Doped BST Alloy

“…The current challenges facing humanity include energy shortage and the greenhouse effect, necessitating the development of new energy sources and the protection of the Earth’s environment. − When utilizing energy sources like coal, oil, and natural gas, a significant amount of heat is wasted in the form of waste heat. − Therefore, the recycling and utilization of these energy sources have become crucial issues. Traditional refrigeration materials have detrimental effects on the ozone layer and the environment. − Hence, there is a need to develop new refrigeration technologies. − Thermoelectric materials have the capability to convert heat energy and electric energy into each other, enabling the recycling and reuse of energy from sources such as automobile exhaust, industrial waste heat, and geothermal energy. − They also offer rapid, precise, eco-friendly, and noise-free cooling methods. − Thus, thermoelectric materials provide potential solutions to the energy crisis and environmental problems we face today. , …”