Authors
Yingjin Luo, Yingfan Chang, Andeng Liu, Yixin Dong, Guoxu Wu, Meidan Ye, Bingjie Wang, Wenxi Guo
Published in
Advanced materials (Deerfield Beach, Fla.). Pages e75016. Sep 16, 2026. Epub Sep 16, 2026.
Abstract
Biomechanical energy is abundant but irregular and low-grade, posing a significant challenge for wearable electronics, where existing energy-harvesting solutions are mainly limited to charging capacitors via physical storage, falling short of achieving a full chemical-charging cycle for practical batteries. To bridge this gap, we developed a closed-loop strategy that integrates an optimized triboelectric nanogenerator, a dedicated lithium-ion battery charge-management system, and fiber lithium-ion batteries (FLIBs). This system achieved a 22.7-fold increase in the root-mean-square current and an 800-fold reduction in the optimal load resistance. Consequently, the charging rate is increased by a factor of 38.8, allowing, for the first time, the full electrochemical charging cycle of 20 and 50 cm FLIBs to be completed within 2.37 ± 0.10 and 6.06 ± 0.11 h, respectively. The self-powered backpack system demonstrated practical viability by powering real-time positioning and outdoor data transmission, marking a decisive advance from energy harvesting to full energy autonomy for wearables.
PMID:
42750383
Bibliographic data and abstract were imported from PubMed on 17 Sep 2026.
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