Choi, Han Seung Hur, Sunghoon Kumar, Ajeet Song, Hyunseok Baik, Jeong Min Song, Hyun-Cheol Ryu, Jungho 2024-01-19T09:03:08Z 2024-01-19T09:03:08Z 2023-06-29 2023-08 0306-2619 https://pubs.kist.re.kr/handle/201004/113455 Waste heat harvesting is of importance to mitigate global warming so that thermoelectric devices have often been suggested; however, such approaches are challenging because of low conversion efficiency of thermoelectrics at low temperature gradient and easy thermal equilibration. In this study, a novel thermo-magneto-pyroelectric energy generator (TMPyEG) was developed to continuously harvest waste heat and convert it into electric en-ergy without complicated electric bias field, required in typical thermodynamic cycling-based pyroelectric generators. To enable displacement reciprocation without intervention, the second-order magnetic phase tran-sition of the soft magnet on an actuating part was repeated in the presence of a thermal gradient. We further incorporate piezoelectric material to mitigate crest factor by filling the energy gaps between pyroelectric energy outputs. Notably, the generated energy from pyroelectric conversion in TMPyEG is superior to that from the reported thermoelectric generators under the similar thermal conditions. English Pergamon Press Ltd. Continuous pyroelectric energy generation with cyclic magnetic phase transition for low-grade thermal energy harvesting Article 10.1016/j.apenergy.2023.121271 1 Applied Energy, v.344 Applied Energy 344 N scie scopus 001008175000001 2-s2.0-85159716053 Energy & Fuels Engineering, Chemical Energy & Fuels Engineering Article WASTE HEAT-RECOVERY GADOLINIUM CARBON POWER SUSCEPTIBILITY Pyroelectric Piezoelectric Energy harvesting Thermal energy Phase transition