Self-charging power system for distributed energy: beyond the energy storage unit

Pu, Xiong; Wang, Zhong Lin

doi:10.1039/d0sc05145d

Cited by 76 publications

(33 citation statements)

References 137 publications

(220 reference statements)

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“…[ 40–42 ] However, TENGs require transducers since they generate AC output, and the phase mismatch among separate devices brings major problems for large‐area scalability and bio‐integration. [ 43 ] Here we integrated the TENG with our ionic diodes and demonstrated its feasibility for harvesting biomechanical energy arising from human activities. The TENG was prepared utilizing a PTFE film and a Cu metal film as the electrode, and detail fabrication process could be found in the Experimental Section.…”

Section: Resultsmentioning

confidence: 99%

Flexible Ionic Diodes with High Rectifying Ratio and Wide Temperature Tolerance

Guo

Wang

Shao

et al. 2022

Adv Funct Materials

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Soft iontronics expand the toolbox of bio‐integrated or bio‐interfaced devices, owing to their natural resemblance with living systems; however, the development for analogous integrated ionic circuits is immature due to the difficulty of fabricating fundamental ionic logic elements. Among these, ionic diodes have motivated great endeavors for their unique ionic current rectifying characteristics. Nonetheless, it is still challenging to achieve high‐performance ionic diodes; also, most reported aqueous solution‐based ionic diodes fail to work at extreme temperatures, seriously hindering their practical uses. This work reports a highly rectifying, temperature‐tolerant, and flexible hydrogel ionic diode enabled by an ethylene glycol/water binary solvent system. The ionic diodes exhibit outstanding dehydration resistance to high temperatures (100 °C) and anti‐freezing performance at low temperatures (−20 °C). Rectification ratios as high as 1201 (with 0% ethylene glycol content) and 566 (with 40% EG content) are achieved, which are distinctly advantageous over most previous reports. A flexible four‐diode bridge full‐wave rectifier circuit is then fabricated, and its integration with the triboelectric nanogenerator for effective biomechanical energy harvesting is demonstrated. This work is believed to open up new insights for the development of future bio‐interfaced applications.

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Section: Resultsmentioning

confidence: 99%

Flexible Ionic Diodes with High Rectifying Ratio and Wide Temperature Tolerance

Guo

Wang

Shao

et al. 2022

Adv Funct Materials

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“…[ 22 ] Generally, the commercial IC is more suitable for power supply with low impedance, but the TENG has a large internal resistance from 10 5 to 10 7 Ω. [ 23 ] Therefore, the aforementioned commercial IC lacks adequate applicability. In other references, the power management circuit combining mechanical switch has been utilized to decrease matching impedance, yet complex layout of the mechanical switch restricts TENG's capability in harvesting energy from natural environment.…”

Section: Resultsmentioning

confidence: 99%

A Universal Power Management Strategy Based on Novel Sound‐Driven Triboelectric Nanogenerator and Its Fully Self‐Powered Wireless System Applications

Wang

Wei-bo

et al. 2021

Adv Funct Materials

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With the development of the Internet of Things (IoT), the power supply to trillions of IoT nodes has become a serious challenge. It is of significant importance to propose a rational power management scheme for constructing fully self‐powered systems using triboelectric nanogenerators (TENG). In this study, as inspired by an embroidery hoop, a new type of TENG without the Helmholtz resonant cavity is developed for collecting sound energy, which can generate the Voc and Isc up to 500 V and 124 µA, respectively at a resonance frequency of 170 Hz and sound pressure of 110 dB. Furthermore, the sound‐driven TENG integrated with a specially designed power management circuit derived from the universal power management strategy (PMS) can successfully drive a commercial narrow band‐IoT wireless node, which realizes periodic temperature and humidity data acquisition and transmission. With the same strategy, an electric switch and a temperature and humidity acquisition system based on Bluetooth technology can also be powered by a contact‐separated TENG and a wind‐driven TENG, demonstrating excellent versatility, adaptability, and universality of the PMS. This study provides a novel solution for the application of TENG in the field of low‐frequency IoT in local and wide areas.

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“…Integrating energy generation and energy storage into a single device bypassed the intermediate step of electricity generation and reduced the energy waste in the rectifying circuit. [55][56][57] One straightforward strategy for assembling piezoelectric EES devices is using the polarized PVDF film to replace the traditional separators (e.g., polypropylene film or polyethylene film) in EES devices. The piezoelectricity is associated with the dipole moments and orientation of the polarized PVDF film.…”

Section: Mechanical Force-responsive Electrolytes For Self-powered Ee...mentioning

confidence: 99%

Functional Electrolytes: Game Changers for Smart Electrochemical Energy Storage Devices

et al. 2021

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Electrochemical energy storage (EES) devices integrated with smart functions are highly attractive for powering the next‐generation electronics in the coming era of artificial intelligence. In this regard, exploiting functional electrolytes represents a viable strategy to realize smart functions in EES devices. In this review, recent advances in the development of functional electrolytes for smart EES devices like rechargeable batteries and supercapacitors are presented. Various stimulus‐responsive electrolytes are first summarized, including temperature‐, mechanical force‐, voltage‐, magnetism‐, and light‐responsive electrolytes. Emphasis is placed on the working principles of stimulus‐responsive electrolytes and their specific problem‐solving functions in EES devices. Then, the latest advances in electrochromic and self‐healing electrolytes used for smart EES devices are discussed. Finally, key challenges and research opportunities related to functional electrolyte design and smart EES device development are envisioned, with the goal of accelerating further research in this thriving field.

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Self-charging power system for distributed energy: beyond the energy storage unit

Abstract: Power devices for smart sensor networks of the coming Internet of Things (IoT) are required with minimum or even no maintenance, due to their enormous quantities and wide and dispersed...

Cited by 76 publications

References 137 publications

Flexible Ionic Diodes with High Rectifying Ratio and Wide Temperature Tolerance

Flexible Ionic Diodes with High Rectifying Ratio and Wide Temperature Tolerance

A Universal Power Management Strategy Based on Novel Sound‐Driven Triboelectric Nanogenerator and Its Fully Self‐Powered Wireless System Applications

Functional Electrolytes: Game Changers for Smart Electrochemical Energy Storage Devices

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