Kim, Hyun Soo Lee, Min Hyuk Kim, Do-Heon Lee, Dong-Gyu Imani, Iman M. Hur, SungHoon Ko, Young Joon Choi, Yeong Uk Cho, Hyunah Song, So-Min Yoon, Tae Kyoung Oh, In Woo Jung, Jong Hoon Chen, Jun Kim, Yunseok Kang, Heemin Ryu, Jungho Baik, Jeong Min Song, Hyun-Cheol 2025-05-22T06:00:27Z 2025-05-22T06:00:27Z 2025-05-21 2025-07 1614-6832 https://pubs.kist.re.kr/handle/201004/152468 The growing reliance on electronic devices has made ambient magnetic field harvesting a promising solution for powering low-power, small-scale technologies, such as those used in the Internet of Things (IoT). While metal alloy-based magneto-deformation materials have traditionally been used to capture energy from stray magnetic fields, they are costly and lack versatility. To advance magnetic field harvesting, it is essential to develop cost-effective, high-performance, and adaptable magneto-deformation materials. Incorporating ferromagnetic metal powders into polymers can induce magneto-rheological behavior. This quasi-solid magneto-rheological effect enables the generation of mechanical vibrations in response to an oscillating external magnetic field. Here, a functional composite film is presented that achieves efficient and straightforward magneto-deformation by integrating Fe powder with poly(vinylidene fluoride-trifluoroethylene). To further enhance the performance of the composite film, MoS2-SiO2 core-shell nanoparticles is exploited for improved charge trapping and employ ferroelectrics to increase the contact potential difference (CPD). The composite film shows a bending displacement of 1 mm in a 4 Oe magnetic field, with each magneto-triboelectric module generating 14.28 mW. The four fabricated modules successfully harvest real-time energy from the stray magnetic field of an electric pot, enabling a battery-free Bluetooth IoT sensor. English Wiley-VCH Verlag Form Factor-Free Magneto-Triboelectric Generator for Standalone Power Line IoT Applications Article 10.1002/aenm.202500856 1 Advanced Energy Materials, v.15, no.25 Advanced Energy Materials 15 25 Y scie scopus 001480059400001 2-s2.0-105004216231 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article STOKES-LAW PERFORMANCE MODULUS ferromagnetic magneto-rheology triboelectric energy harvesting ferroelectric