An Omnidirectionally Stretchable Piezoelectric Nanogenerator Based on Hybrid Nanofibers and Carbon Electrodes for Multimodal Straining and Human Kinematics Energy Harvesting

Siddiqui, Saqib; Lee, Han Byeol; Kim, Do‐Il; Duy, Le Thai; Hanif, Adeela; Lee, Nae‐Eung

doi:10.1002/aenm.201701520

Cited by 114 publications

(63 citation statements)

References 51 publications

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“…Thus, storing the converted electrical energy with an energy storage device could be a more effective utilization for these FBECDs. Moreover, the wearable energy storage devices usually possess a limited power density, and storing the electricity from FBECD could be an efficient way to compensate for the energy consumption of batteries or supercapacitors, prolong the operation time, or even form a self‐powered system for wearable electronics . Electrical power from the FPENGs, FENGs, and FTENGs can be stored by the energy storage device through an external power management circuit to promote the efficiency (Figure e–g).…”

Section: Device Designmentioning

confidence: 99%

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

et al. 2019

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body is actually a tremendous storehouse of energy that is generated from body heat and motion. [15][16][17][18][19] Power generation from breathing, heating, blood transport, arm motion, typing, and walking could reach to over 100 W for a 68 kg adult's daily activities (Figure 1). [20] Thus, converting 1% of power from the human body may be enough to support the work of most portable electronics.In the past two decades, researchers have developed several energy conversion devices based on piezoelectricity, electrostaticity, triboelectricity, or thermoelectricity that can directly harvest the mechanical or thermal energy and convert it into electric energy (these conversion devices are so-called nanogenerators (NGs)). [21][22][23][24][25] The first nanogenerator (NG) based on ZnO was invented by Prof. Wang in 2006; after that, various NGs were developed to harvest the mechanical or thermal energy with the output performance increasing gradually. [26] These NGs are easy-to-construct flexible devices since most materials for these devices are polymers and nanomaterials. Generally, the flexible devices assembled by film materials can be stretchable and bendable in one direction. But their lack of air-permeability, poor 3D deformation, and low damage tolerance limit their application, especially for wearable electronics. Therefore, fiberbased energy conversion devices have been designed. [27] These fiber-based devices can also be knitted to yarn or fabric in the clothing system to build up a large area electronic system. [28,29] The energy generation and internal charging can be realized by means of a self-powered system that harvests the energy from natural sources around the human body to sustain the wearable electronics. [30][31][32] The search for functional materials that possess good conversion efficiency, as well as great mechanical and environmental stability, combined with a novel device design might push these devices to meet the requirement of a practical application. In the past decade, numerous contributions have been offered to improve the performance of fiber-based energy conversion devices (FBECD) and extend its application. This review specifically summarizes FBECD with different energy conversion mechanisms including piezoelectricity, electrostaticity, triboelectricity, and thermoelectricity in recent processes (Figure 2). The functional materials, fiber fabrication techniques, and device design strategies for different classes of FBECDs are covered in the article. We also introduce an overview of the fiber-based self-powered system and sensors and Following the rapid development of lightweight and flexible smart electronic products, providing energy for these electronics has become a hot research topic. The human body produces considerable mechanical and thermal energy during daily activities, which could be used to power most wearable electronics. In this context, fiber-based energy conversion devices (FBECD) are proposed as candidates for effective conversion of human-body energy into electricity...

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Section: Device Designmentioning

confidence: 99%

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

et al. 2019

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“…A graphite electrode was deposited on a 3D micropatterned stretchable PDMS substrate (Figure d). With a composite of barium titanate nanoparticles/polyurethane/poly(vinylidenefluoride‐trifluoroethylene) electrospun mats as the piezoelectric layer, the PENG exhibited a peak open circuit voltage of 9.3 V at a maximum strain of 30% with high mechanical durability for 9000 cycles (Figure e) …”

Section: Applications Of Buckled Structuresmentioning

confidence: 99%

Section: Applications Of Buckled Structuresmentioning

confidence: 99%

Buckled Structures: Fabrication and Applications in Wearable Electronics

Dou

et al. 2019

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Wearable electronics have attracted a tremendous amount of attention due to their many potential applications, such as personalized health monitoring, motion detection, and smart clothing, where electronic devices must conformably form contacts with curvilinear surfaces and undergo large deformations. Structural design and material selection have been the key factors for the development of wearable electronics in the recent decades. As one of the most widely used geometries, buckling structures endow high stretchability, high mechanical durability, and comfortable contact for human–machine interaction via wearable devices. In addition, buckling structures that are derived from natural biosurfaces have high potential for use in cost‐effective and high‐grade wearable electronics. This review provides fundamental insights into buckling fabrication and discusses recent advancements for practical applications of buckled electronics, such as interconnects, sensors, transistors, energy storage, and conversion devices. In addition to the incorporation of desired functions, the simple and consecutive manipulation and advanced structural design of the buckled structures are discussed, which are important for advancing the field of wearable electronics. The remaining challenges and future perspectives for buckled electronics are briefly discussed in the final section.

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“…Siddiqui demonstrated the usage of 3D micro printed omni-directional substrates that are very flexible and robust even for the stretching of the knee. An output power of 1.76 µW cm −2 was obtained from knee movements during a walk [4]. Kim analyzed the effect of force (4N) and frequency (2 Hz) on output power for human-based piezoelectric energy harvesters at different angles (i.e., 0 • , 45 • , and 90 • ).…”

Section: Human-based Pehmentioning

confidence: 99%

“…The phenomenon of energy harvesting based on piezoelectric transducers can be defined as the transformation of energy absorbed by a transducer from an operating environment to electric voltage that be used on the spot for actuation or stored in batteries for future usage [1][2][3][4]. As the world is shifting from electrical equipment to electronic devices due to the energy crisis, it is leading to a reduction in electrical power consumption, resulting in micro and nano powered electronic circuits [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A Review on Mechanisms for Piezoelectric-Based Energy Harvesters

2018

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From last few decades, piezoelectric materials have played a vital role as a mechanism of energy harvesting, as they have the tendency to absorb energy from the environment and transform it to electrical energy that can be used to drive electronic devices directly or indirectly. The power of electronic circuits has been cut down to nano or micro watts, which leads towards the development of self-designed piezoelectric transducers that can overcome power generation problems and can be self-powered. Moreover, piezoelectric energy harvesters (PEHs) can reduce the need for batteries, resulting in optimization of the weight of structures. These mechanisms are of great interest for many researchers, as piezoelectric transducers are capable of generating electric voltage in response to thermal, electrical, mechanical and electromagnetic input. In this review paper, Fluid Structure Interaction-based, human-based, and vibration-based energy harvesting mechanisms were studied. Moreover, qualitative and quantitative analysis of existing PEH mechanisms has been carried out.

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An Omnidirectionally Stretchable Piezoelectric Nanogenerator Based on Hybrid Nanofibers and Carbon Electrodes for Multimodal Straining and Human Kinematics Energy Harvesting

Cited by 114 publications

References 51 publications

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

Buckled Structures: Fabrication and Applications in Wearable Electronics

A Review on Mechanisms for Piezoelectric-Based Energy Harvesters

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