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| 1 | All-in-one cellulose based hybrid tribo/piezoelectric nanogenerator显示文摘Aybrid tribo/piezoelectric nanogenerators (HTPENG) have been proven to be highly efficient and versatile as far as the collection and conversion of ambient energy are concerned, and the introduction of flexible and green materials is a key step for their potential applications. Here, we developed a HTPENG by using nitrocellulose nanofibril paper as the triboelectric layer and BaTiCVMWCNT@ bacterial cellulose paper as the piezoelectric layer. The output of the triboelelctric paper has considerable performance as fluorinated ethylene propylene, and the output of piezoelectric paper is more than ten times higher than the BTO/polydimethylsiloxane structure. The integrated outputs of the sandwich structured HTPENG are 18 V and 1.6 pA·cm^-2, which are capable of lighting up three LED bulbs and charging a 1 pF capacitor to 2.5 V in 80 s. In addition, the voltage signal generated by the HTPENG in contact-separation mode can be used for dynamic pressure detection. The linear range of dynamic pressure is from 0.5 to 3 N·cm^-2 with a high sensitivity of 8.276 V·cm^-2·N^-1 and a detection limit of 0.2 N·cm^-2. This work provides new insights into the design and application of cellulose-based hybrid nanogenerators with high flexibility and simple structure. | Ming Li Yang Jie Li-Hua Shao Yilin Guo Xia Cao Ning Wang Zhong Lin Wang | 2019 | Nano Research2019，12，8： | 9 |
| 2 | Triboelectric Nanogenerator Enabled Smart Shoes for Wearable Electricity Generation显示文摘The parallel evolution of wearable electronics,artificial intelligence,and fifth-generation wireless technology has created a technological paradigm with the potential to change our lives profoundly.Despite this,addressing limitations linked to continuous,sustainable,and pervasive powering of wearable electronics remains a bottleneck to overcome in order to maximize the exponential benefit that these technologies can bring once synergized.A recent groundbreaking discovery has demonstrated that by using the coupling effect of contact electrification and electrostatic induction,triboelectric nanogenerators(TENGs)can efficiently convert irregular and low-frequency passive biomechanical energy from body movements into electrical energy,providing an infinite and sustainable power source for wearable electronics.A number of human motions have been exploited to properly and efficiently harness this energy potential,including human ambulation.Shoes are an indispensable component of daily wearing and can be leveraged as an excellent platform to exploit such kinetic energy.In this article,the latest representative achievements of TENG-based smart electricity-generating shoes are comprehensively reviewed.We summarize ways in which not only can biomechanical energy be scavenged via ambulatory motion,but also biomonitoring of health parameters via tracking of rhythm and strength of pace can be implemented to aid in theranostic fields.This work provides a systematical review of the rational structural design,practical applications,scenario analysis,and performance evaluation of TENG-based smart shoes for wearable electricity generation.In addition,the perspective for future development of smart electricity-generation shoes as a sustainable and pervasive energy solution towards the upcoming era of the Internet of Things is discussed. | Yongjiu Zou Alberto Libanori Jing Xu Ardo Nashalian Jun Chen | 2020 | Research2020，，1： | 6 |
| 3 | A hybridized electromagnetic-triboelectric nanogenerator designed for scavenging biomechanical energy in human balance control显示文摘For human beings of different ages and physical abilities, the inherent balance control system is ubiquitous and active to prevent falling, especially in motion states. A hybridized electromagnetic-triboelectric nanogenerator (HETNG) is prepared to harvest biomechanical energy during human balance control processes and achieve significant monitoring functions. The HETNG is composed of a symmetrical pendulum structure and a cylinder magnet rolling inside. Four coils are divided into two groups which form into two electromagnetic generators (EMGs). Besides, two spatial electrodes attached to the inner wall constitute a freestanding mode triboelectric nanogenerator (TENG). With a rectification circuit, the HETNG presents a high output power with a peak value of 0.55 W at a load of 160 Ω. Along with human balance control processes during walking, the HETNG can harvest biomechanical energy at different positions on the trunk. Moreover, the HETNG applied in artificial limb has been preliminarily simulated with the positions on thigh and foot, for monitoring the actions of squat and stand up, and lifting the leg up and down. For the elder that walks slowly with a walking aid, the HETNG equipped on the walking aid can help to record the motions of forwarding and unexpected falling, which is useful for calling for help. This work shows the potential of biomechanical energy-driven HETNG for powering portable electronics and monitoring human motions, also shows significant concerns to people lacked action capability or disabled. | Long Liu Qiongfeng Shi Chengkuo Lee | 2021 | Nano Research2021，14，11： | 3 |
| 4 | Coil-levitated hybrid generator for mechanical energy harvesting and wireless temperature and vibration monitoring显示文摘The development of wireless monitoring is currently restricted by the short lifetime of batteries,requiring frequent replacement.Utilization of abundant mechanical energy from the surrounding environment has attracted increasing attention in real-time monitoring.Herein,a coil-levitated hybrid generator was developed for the efficient harvesting of mechanical energy from mechanical motion.The novel coil-levitated structure adapted to the metal and magnetic environment.The output currents were systematically analyzed at different operation modes based on the unique combination of triboelectrification,electromagnetic induction,and piezoelectric effect.Under the excitation of vibration frequency and amplitude of 8 Hz and 5 mm respectively,the as-constructed triboelectric nanogenerator delivered a peak power density of 11.40 W/m3 at 10 MΩ.Meanwhile,the middle electromagnetic part and bottom piezoelectric generator provided peak power densities of 6.97 and 79.93 W/m2 at 10000Ω,respectively.More importantly,the battery charging experiment was verified,in which a 30 mA h Li-ion battery can be charged from 2.57 to 3.27 V in about 90 min.In sum,a self-powered temperature and vibration monitoring system was successfully developed based on hybrid generator,promising for realizing wireless monitoring of mechanical equipment without any external power supply. | XUE XiaoBin ZHANG ZengXing WU Bin HE ShanShan WANG Qiang ZHANG WenJun BI RuiYu CUI Juan ZHENG YongQiu XUE ChenYang | 2021 | Science China(Technological Sciences)2021，64，6： | 2 |
| 5 | A self-powered and concealed sensor based on triboelectric nanogenerators for cultural-relic anti-theft systems显示文摘The theft prevention for cultural relics in museums,field excavation sites,and temporary exhibition events is of extreme importance.However,traditional anti-theft technologies such as infrared monitoring and radio frequency identification are highly costly,power-consuming,and easy to break.Here,a transparent,ultrathin,and flexible triboelectric sensor(TUFS)with a simple and low-cost method is proposed.With a thickness,weight,and transmittance of 92μm,0.12 g,and 89.4%,the TUFS manifests superb concealment.Benefiting from the characteristic of triboelectric nanogenerators,the TUFS responds effectively to common cultural-relic materials.Moreover,distinguished electrical responses can be obtained even for very small weights(10 g)and areas(1 cm^(2)),proving the sensitivity and wide range of use of the TUFS.Finally,we construct a concealed cultural-relic anti-theft system that enables real-time alarming and accurate positioning of cultural relics,which is expected to strengthen the security level of the existing museum anti-theft systems. | Baocheng wang Xiaoying Zhai Xuelian Wei Yapeng Shi Xiaoqing Huo Ruonan Li Zhiyi Wu Zhong Lin Wang | 2022 | Nano Research2022，15，9： | 0 |
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