Kai Dong

Mechano-electric fibers (MEFs) represent a novel class of smart textiles that offer a robust pathway for comfortable wear and efficient harvesting of human biomechanical energy by integrating with triboelectric nanogenerators (TENGs). MEFs can serve as a sustainable power supply for wearable electronics and function as sensitive and convenient platforms for the acquisition of human motion signals, and the detection of environmental stimuli. This review emphasizes that the triboelectric mechanism, response characteristics, and textile architecture endow MEFs with distinctive advantages, including highly efficient low-frequency bioenergy conversion, progressive multi-stage high-sensitivity responses, and versatile structural designs. Consequently, these features facilitate autonomous and sustainable on-body energy and information supply systems. Furthermore, the emerging functionalities and diverse applications of MEFs demonstrate the substantial potential of human-centric self-powered wearable systems, including motion capture, physiological monitoring, and environmental perception. Finally, we provide a comprehensive discussion on the critical challenges currently impeding the design and practical implementation of MEFs.

The falcon-inspired power cloak effectively converts biomechanical energy into electricity to achieve on-body energy autonomy.

Ceramics are prized for exceptional strength, but their inherent brittleness has long been a fundamental bottleneck. Here, we report tensile plastic Al₂O₃ meta-fibers that achieve a combination of high tensile strength (1.94 GPa) and large plastic strain (10.01%), with micro-strain reaching 194%. This is enabled via a phase-regulation strategy that constructs high-purity unsaturated [AlO₅] coordination with disordered oxygen lattices in Al₂O₃ fibers. The metastable [AlO₅] fundamentally alters the deformation mechanics by reducing the energy barrier for bond breaking and reformation, while the disordered oxygen lattice facilitates extensive atomic displacement, collectively enabling intrinsic plastic behavior. This local plasticity accumulates in high-purity networks, ultimately achieving macroscopic tensile plasticity of fibers, challenging conventional understanding of ceramic deformation. These plastic fibers can be twisted and woven into high-strength, stretchable refractory ceramic fabrics. Our work establishes metastable phase customization as a universal paradigm, opening a promising pathway for designing superplastic ceramics.

Contact electrification (CE), a ubiquitous phenomenon enabling mechanical-driven power generation, has emerged as a promising approach for sustainable energy conversion. However, due to the lack of quantitative characterization tools and well-defined correlations with material properties, the dynamic processes and underlying mechanisms of contact-induced mechano-electric conversion (MEC) remain poorly understood. Herein, we develop a standardized multiscale quantitative method for characterizing contact-induced charges, enabling precise measurement and in-situ observation of MEC. Furthermore, we systematically investigate how key properties of common semicrystalline polymers (such as band structure and aggregation state) govern MEC behaviors, establishing an intrinsic relationship between material properties and MEC performance. Building up this, we propose a coherent two-step CE model involving interfacial charge transfer followed by bulk charge transport, which describes the complete lifecycle of contact-induced charges from generation to collection. We further reveal that differences in interfacial energy-level alignment serve as the fundamental driving force for electron transfer from donors to acceptors, while injected charge carriers are transported via a hopping conduction mechanism between localized state traps. This study establishes a paradigm for CE research, deepening the fundamental understanding of contact-induced MEC and laying a foundation for the design of next-generation high-performance polymer dielectrics.

Robust speech interaction in complex acoustic environments represents a critical challenge in human‐computer interaction. Conventional air‐conduction microphones are susceptible to environmental noise, limiting their application in noisy scenarios. To address this, we present an anti‐interference skin‐compatible voice patch (AISC‐VP). The device operates by adhering to the neck and capturing surface micro‐vibrations, thus physically bypassing ambient noise interference. Constructed from a polyurethane‐enhanced silk fibroin film (P‐SF) and a fluorinated ethylene propylene (FEP) woven layer, the sensor demonstrates exceptional mechanical properties, moisture permeability, and optical transparency. It exhibits a frequency response across a broad 20–10 000 Hz range, achieving a signal‐to‐noise ratio of 63.5 dB with a full width at half maximum below 0.3 Hz. For noise‐robust recognition, the AISC‐VP demonstrates only a 0.74% increase in character error rate when transcribing audio from an 85 dB high‐noise environment compared to direct recognition of original audio, while significantly outperforming microphones. By taking advantage of the natural orthogonal characteristics of the voice and touch spectra, zero crosstalk voice‐touch dual‐mode operation is reliably achieved without misjudgment in a high‐noise scene. This work provides a high‐performance hardware solution for speech capture in noisy environments, demonstrating AISC‐VP's potential for intelligent communication, health monitoring, and human‐computer interaction.