DataVXAdvanced Energy MaterialsPaper
journal article·2025-11Open access

Piezoelectric DC Generator Through Sequential In‐Phase Polarization Variation

Hyun Soo Kim, Sunghoon Hur, In Woo Oh, Chulwan Lim, Huimin Qiao, Hyung‐Jin Choi, Min‐Seok Kim, Dae Sol Kong, Jong Hoon Jung, Joonchul Shin, Seung‐Hyub Baek, Jun Chen, Chong‐Yun Kang, Jeong Min Baik, Yu U. Wang, Shashank Priya, Seong H. Kim, Yunseok Kim, Hyung‐Suk Oh, Kyung‐Hoon Cho, Jungho Ryu, Hyun‐Cheol Song

Advanced Energy Materials· Volume 15· Issue 44
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Source abstract

Abstract

Abstract Energy harvesting has drawn growing interest as a reliable power source for IoT applications, with piezoelectric materials notable for their high sensitivity and straightforward integration. Their robust mechanical‐electrical coupling also makes them ideal for harnessing environmental vibrations or mechanical motions. Still, standard piezoelectric harvesters inherently produce alternating current (AC), necessitating complex rectification steps and leading to substantial energy loss. This work introduces a direct current (DC) harvesting method that employs a novel in‐phase polarization strategy, enabling a stable, continuous DC output. This approach surpasses prior attempts that offered only low or pulsed DC signals, achieving an open‐circuit voltage of 33.44 V and a short‐circuit current of 3.72 mA with a size of 7.5 cm 2 . A prototype generator demonstrated a maximum power output of 29.73 mW. Moreover, this design is both miniaturizable and scalable, broadening its potential deployment across diverse sectors. Its practical value was exemplified by directly powering CO 2 electrolysis, where it achieveds a Faradaic efficiency of 86.22%, underscoring the method's ability to circumvent AC‐based inefficiencies and pave the way for more effective, sustainable energy solutions.
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Research context

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Acoustic Wave Resonator Technologies · Innovative Energy Harvesting Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Electronic and Hybrid Materials Research Center Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea

Division of Energy & Environment Technology University of Science and Technology Seoul 02792 Republic of Korea

KIST‐SKKU Carbon‐Neutral Research Center Sungkyunkwan university (SKKU) Suwon 16419 Republic of Korea

School of Advanced Materials Science and Engineering Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea

KU‐KIST Graduate School of Converging Science and Technology Korea University Seoul 02447 Republic of Korea

Clean Energy Research Center Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea

Department of Materials Science and Enginnering Research Institute of Advanced Materials Seoul National University Seoul 08826 Republic of Korea

Department of Physics Inha University Incheon 22212 Republic of Korea

Program in Semiconductor Convergence Inha University Incheon 22212 Republic of Korea

Advanced Bio and Healthcare Materials Research Division Korea Institute of Materials Science (KIMS) Changwon 51508 Republic of Korea

Department of Bioengineering University of California Los Angeles Los Angeles CA 90095 USA

SKKU Institute of Energy Science and Technology (SIEST) Sungkyunkwan University Suwon 16419 Republic of Korea

Department of Materials Science and Engineering Michigan Technological University Houghton MI 49931 USA

Department of Materials Science and Engineering Pennsylvania State University University Park PA 16802 USA

Department of Chemical Engineering and Materials Research Institute Pennsylvania State University University Park PA 16802 USA

School of Materials Science and Engineering Kumoh National Institute of Technology Gumi 39177 Republic of Korea

School of Materials Science and Engineering Yeungnam University Gyeongsan 38541 Republic of Korea

Department of Materials Science and Engineering Korea University Seoul 02841 Republic of Korea

Funding

National Research Foundation of Korea

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