A highly efficient constant-voltage triboelectric nanogenerator

Li, Xinyuan; Zhang, Chuguo; Gao, Yikui; Zhao, Zhihao; Hu, Yuexiao; Ou, Yang; Liu, Lu; Zhou, Linglin; Wang, Jie; Wang, Zhong Lin

doi:10.1039/d1ee03961j

Cited by 76 publications

(68 citation statements)

References 36 publications

(56 reference statements)

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“…This improved capacitance effectively reduced the matching impedance from 390 to 210 Ω with spring index from 0.49 to 0.65 (Figure S18, Supporting Information). Reducing the matching impedance is of significant interest in the mechanical harversters to improve the energy transfer efficiency, [ 20 ] thus, we believe our L‐coiled yarn harvester was able to deliver high energy transfer efficiency, as described above. In addition, to further understand performances of L‐coiled yarn harvesters in various potential environments, extended conditions have been investigated with several types of electrolytes (acidic, neutral, and basic), electrolyte concentration (0.001–5 m ), and temperatures (0–30 °C).…”

Section: Resultsmentioning

confidence: 93%

Chemo‐Mechanical Energy Harvesters with Enhanced Intrinsic Electrochemical Capacitance in Carbon Nanotube Yarns

Kim

Goh

et al. 2022

Advanced Science

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Predicting and preventing disasters in difficult-to-access environments, such as oceans, requires self-powered monitoring devices. Since the need to periodically charge and replace batteries is an economic and environmental concern, energy harvesting from external stimuli to supply electricity to batteries is increasingly being considered. Especially, in aqueous environments including electrolytes, coiled carbon nanotube (CNT) yarn harvesters have been reported as an emerging approach for converting mechanical energy into electrical energy driven by large and reversible capacitance changes under stretching and releasing. To realize enhanced harvesting performance, experimental and computational approaches to optimize structural homogeneity and electrochemical accessible area in CNT yarns to maximize intrinsic electrochemical capacitance (IEC) and stretch-induced changes are presented here. Enhanced IEC further enables to decrease matching impedance for more energy efficient circuits with harvesters. In an ocean-like environment with a frequency from 0.1 to 1 Hz, the proposed harvester demonstrates the highest volumetric power (1.6-10.45 mW cm −3 ) of all mechanical harvesters reported in the literature to the knowledge of the authors. Additionally, a high electrical peak power of 540 W kg −1 and energy conversion efficiency of 2.15% are obtained from torsional and tensile mechanical energy.

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Section: Resultsmentioning

confidence: 93%

Chemo‐Mechanical Energy Harvesters with Enhanced Intrinsic Electrochemical Capacitance in Carbon Nanotube Yarns

Kim

Goh

et al. 2022

Advanced Science

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“…Besides serving as power units, MBs can also act as energy storage devices that store energy from external energy harvesters, e.g., solar cells, nanogenerators, or direct power supplies. [ 66–68 ] Directly harvesting and utilizing power from solar energy is renewable and environmentally friendly. To this end, a self‐powering wristband system by integrating flexible Zn‐ion MB with perovskite solar cells was demonstrated (Figure 6b).…”

Section: Applications For Wearable and Implantable Fieldsmentioning

confidence: 99%

Rechargeable Micro‐Batteries for Wearable and Implantable Applications

Liao

et al. 2022

Small Structures

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The rise of wearable and implantable microelectronics calls for the corresponding high‐performance micropower sources. Rechargeable micro‐batteries (MBs) are considered the most promising candidate due to their high energy density and stable voltage output. To date, various MBs with different configurations have been designed to meet the ever‐growing high energy consumption requirements of microelectronic devices. Therefore, it is very urgent to summarize the current challenges of MBs and discuss solutions for future research. In this perspective, a comprehensive overview and insights on rechargeable MBs are carefully presented with an emphasis on the design of various configurations. The representative preparation methods and application scenarios of various MBs have been summarized. The challenges and future perspectives are also discussed to provide insights into the forward‐looking research and potential directions of this promising field.

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“…TENGs, which convert mechanical energy into electricity based on a combination of electrification and electrostatic induction effects, have numerous merits including simple structures and fabrication processes, excellent flexibility, mechanical durability, low cost, high efficiency, and lightweight. [13][14][15][16][17][18] Most relevantly, TENGs generate energy from irregular and low-frequency of mechanical energy. Therefore, in the last few years, researchers have evaluated various concepts for enhancing TENG outputs for a wider application.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in stretchable, wearable and bio-compatible triboelectric nanogenerators

et al. 2022

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A highly efficient constant-voltage triboelectric nanogenerator

Abstract: The rapid development of Internet of Things and artificial intelligence brings increasing attention on the distributed power sources by using triboelectric nanogenerator (TENG), the enhancement of energy output of TENG...

Cited by 76 publications

References 36 publications

Chemo‐Mechanical Energy Harvesters with Enhanced Intrinsic Electrochemical Capacitance in Carbon Nanotube Yarns

Chemo‐Mechanical Energy Harvesters with Enhanced Intrinsic Electrochemical Capacitance in Carbon Nanotube Yarns

Rechargeable Micro‐Batteries for Wearable and Implantable Applications

Recent advances in stretchable, wearable and bio-compatible triboelectric nanogenerators

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