High power-output and highly stretchable protein-based biomechanical energy harvester

Bo, Xiangkun; Uyanga, Kindness A.; Wang, Lingyun; Firdous, Irum; Shi, Jinhong; Li, Weilu; Almardi, Jasim; Fahim, Muhammad; Liu, Fei; Lyu, Huanlin; Daoud, Walid A.

doi:10.1016/j.cej.2022.138714

Cited by 4 publications

(2 citation statements)

References 63 publications

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“…With its high electric output, the WLS-0.2-based TENG is able to lit up 242 LEDs connected in series (Figure 4h; Video S4, Supporting Information) with a charge density of 155 μC m −2 , which is higher than reported WPU-based and other related TENGs (Figure 4g). [51][52][53][54][55][56][57][58][59][60][61][62][63] The device also exhibits excellent stability, retaining 100% of its V OC after 50 000 cycles. (Figure 4i; Figure S8, Supporting Information).…”

Section: Electric Outputmentioning

confidence: 99%

Surfactant Self‐Assembly Enhances Tribopositivity of Stretchable Ionic Conductors for Wearable Energy Harvesting and Motion Sensing

Bo,

Zhao,

Valencia

et al. 2024

Advanced Materials

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Boosting stretchability and electric output is critical for high‐performance wearable triboelectric nanogenerators (TENG). Herein, for the first time, we propose a new approach for tuning the composition of surface functional groups through surfactant self‐assembly to improve the tribopositivity, where the assembly increases the transferred charge density and the relative permittivity of water polyurethane (WPU). Incorporating bis(trifluoromethanesulfonyl)imide (TFSI−) and alkali metal ions into a mixture of WPU and the surfactant forms a stretchable film that simultaneously functions as positive tribolayer and electrode, preventing the conventional detachment of tribolayer and electrode in long term usage. Further the introduction of surfactant and alkali metal ions in WPU forms a strong crosslinking network. Resultantly, the conductivity of the crosslinked film reaches 3.3 × 10−3 mS cm−1 while the elongation at break reaches 362%, which are 4.8×104‐fold and 1.3‐fold higher than pristine WPU, respectively. Moreover, the surfactant self‐assembly impedes the adverse impact of the fluorine‐containing groups on tribopositivity. The self‐assembled and LiTFSI‐doped WPU‐based TENG generates an open circuit voltage of 120 V, a short circuit current of 7.5 µA and a transfer charge of 62 nC, representing a 4‐fold increase compared to LiTFSI‐doped WPU‐based TENG. Consequently, the charge density reaches 155 µC m−2, being the highest recorded for WPU‐based and stretchable ionic conductive TENG. This work introduces a novel approach for boosting the output charge density while avoiding the adverse effect of ionic salt in solid conductors through a universal surfactant self‐assembly strategy, which can be extended to other materials, such as polyvinyl alcohol. Further, the device was used to monitor and harvest the kinetic energy of human body motion.This article is protected by copyright. All rights reserved

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Section: Electric Outputmentioning

confidence: 99%

Surfactant Self‐Assembly Enhances Tribopositivity of Stretchable Ionic Conductors for Wearable Energy Harvesting and Motion Sensing

Bo,

Zhao,

Valencia

et al. 2024

Advanced Materials

Self Cite

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“…Traditional choices involved polymers, such as poly(tetrafluoroethylene) (PTFE), poly(vinylidene difluoride) (PVDF), polydimethylsiloxane (PDMS), and nylon, as friction layers, which are neither cost-effective nor biodegradable. − Furthermore, those commercial polymers can produce potentially harmful chemicals, restricting their applications in biomedicine. Hence, the development of bio-inspired, non-toxic, ultra-sensitive, and flexible TENGs has become a great challenge for next-generation biomedical applications. − Although several biowaste materials, including rice husks, seagrasses, leaves, , sunflower husks, peanut shell powders, and fish bladders, have been used to form the friction layers, the processes for preparing biowaste material friction layers have been complicated and required the usage of harmful solvents. Moreover, those biowaste materials do not have a natural fiber structure, thereby minimizing the electrical output of the nanogenerator.…”

Section: Introductionmentioning

confidence: 99%

Biowaste Eggshell Membranes for Bio-triboelectric Nanogenerators and Smart Sensors

et al. 2023

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In this study, we used a simple and cost-effective method to fabricate triboelectric nanogenerators (TENGs) based on biowaste eggshell membranes (EMs). We prepared stretchable electrodes with various types of EMs (hen, duck, goose, and ostrich) and employed them as positive friction materials for bio-TENGs. A comparison of the electrical properties of the hen, duck, goose, and ostrich EMs revealed that the output voltage of the ostrich EM could reach up to 300 V, due to its abundant functional groups, natural fiber structure, high surface roughness, high surface charge, and high dielectric constant. The output power of the resulting device reached 0.18 mW, sufficient to power 250 red light-emitting diodes simultaneously, as well as a digital watch. This device also displayed good durability when subjected to 9000 cycles at 30 N at a frequency of 3 Hz. Furthermore, we designed an ostrich EM-TENG as a smart sensor for the detection of body motion, including leg movement and the pressing of different numbers of fingers.

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Sustainable materials systems for triboelectric nanogenerator

Hao,

Zhang,

et al. 2024

SusMat

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Benefiting from the high sensitivity and electromechanical conversion efficiency, triboelectric nanogenerators (TENGs) are widely used in various fields of self‐powered sensing and mechanical energy harvesting, which have great potential for application in future smart Internet of Things. The development of sustainable triboelectric materials with high‐performance has a vital impact on the construction of TENG devices that combine high‐output performance and environmental friendliness, which have a positive impact on the sustainable development of humanity. This review systematically and comprehensively summarizes the latest research work on TENG's sustainable materials. First, an overall overview is provided based on the composition of the materials, including amino acids, polysaccharides, and synthetic polymer, and the representative research works are further classified and summarized in detail. In addition, the latest research progress of TENG with sustainable materials in the fields of self‐powered sensing and mechanical energy harvesting applications is also summarized. Finally, the overviews are provided for the various challenges in the current development of TENG's sustainable material, and the related outlooks are offered on the corresponding development strategies and directions of this field in the future.

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High power-output and highly stretchable protein-based biomechanical energy harvester

Cited by 4 publications

References 63 publications

Surfactant Self‐Assembly Enhances Tribopositivity of Stretchable Ionic Conductors for Wearable Energy Harvesting and Motion Sensing

Surfactant Self‐Assembly Enhances Tribopositivity of Stretchable Ionic Conductors for Wearable Energy Harvesting and Motion Sensing

Biowaste Eggshell Membranes for Bio-triboelectric Nanogenerators and Smart Sensors

Sustainable materials systems for triboelectric nanogenerator

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