Enhanced performance of piezoelectric composite nanogenerator based on gradient porous PZT ceramic structure for energy harvesting

2020 ◽  
Vol 8 (37) ◽  
pp. 19631-19640
Author(s):  
Huan Liu ◽  
Xiujuan Lin ◽  
Shuo Zhang ◽  
Yu Huan ◽  
Shifeng Huang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Conversion Efficiency ◽  
Piezoelectric Composite ◽  
Ceramic Structure ◽  
Lamellar Region ◽  
Oriented Layer ◽  
Electromechanical Conversion ◽  
Porous Pzt ◽  
Pzt Ceramic

Oriented layer and interconnected transverse bridges between layers in the progressive lamellar region effectively improved the electromechanical conversion efficiency.

scholarly journals Electromechanical conversion efficiency for dielectric elastomer generator in different energy harvesting cycles

AIP Advances ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 115117 ◽  
Author(s):  
Jian-Bo Cao ◽  
Shi-Ju E ◽  
Zhuang Guo ◽  
Zhao Gao ◽  
Han-Pin Luo
Keyword(s):  
Energy Harvesting ◽  
Conversion Efficiency ◽  
Dielectric Elastomer ◽  
Electromechanical Conversion

scholarly journals Porous PZT Ceramics with Aligned Pore Channels for Energy Harvesting Applications

2015 ◽  
Vol 98 (10) ◽  
pp. 2980-2983 ◽  
Author(s):  
Yan Zhang ◽  
Yinxiang Bao ◽  
Dou Zhang ◽  
Chris R. Bowen
Keyword(s):  
Energy Harvesting ◽  
Pzt Ceramics ◽  
Porous Pzt

scholarly journals Optimizing the Energy Harvesting Cycle of a Dissipative Dielectric Elastomer Generator for Performance Improvement

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1341 ◽  
Author(s):  
Peng Fan ◽  
Hualing Chen
Keyword(s):  
Energy Density ◽  
Energy Harvesting ◽  
Time Constant ◽  
Conversion Efficiency ◽  
Dielectric Elastomer ◽  
Enhancement Effect ◽  
The Novel ◽  
Optimal Transfer ◽  
Conversion Performance ◽  
Good Agreement

This paper optimizes the energy harvesting cycle of dissipative dielectric elastomer generators (DEGs) to explore possible approaches for improving the energy harvesting performance. By utilizing the developed theoretical framework, the dissipative performance of the DEG with a constant voltage cycle is analyzed, which shows good agreement with the existing experimental data. On this basis, we design a novel energy harvesting cycle and a corresponding energy harvesting circuit in which a transfer capacitor is utilized to store the charge transferred from the DEG. Then, the energy conversion performance of the DEG with the novel energy harvesting cycle is investigated. The results indicate that both the energy density and conversion efficiency are improved by choosing a high voltage during the discharging process and that as the R-C time constant increases, the enhancement effect of the voltage increases and then approaches to the saturation. In addition, there is an optimal transfer capacitor that can maximize energy density or conversion efficiency, and the optimal transfer capacitor increases with the increase in the R-C time constant. These results and methods are expected to guide the optimal design and assessment of DEGs.

Optimizing Design of Piezoelectric Trimorph, as Positioning Element and Energy Harvesting Device

2015 ◽  
Vol 772 ◽  
pp. 125-129
Author(s):  
Cristian Necula ◽  
C. Daniel Comeagă ◽  
Octavian Donţu
Keyword(s):  
Energy Harvesting ◽  
Analytical Model ◽  
Composite Structure ◽  
Electronic Devices ◽  
Piezoelectric Composite ◽  
Fea Model ◽  
Environmental Friendly ◽  
Optimizing Design ◽  
Feasible Option ◽  
Mems Device

In future, demand on portable electronic devices will create the requirements of enduring recharged sources of power. A non-environmental friendly conventional battery with limited lifetimes has no longer feasible option. One of the mostly used solution is the piezoelectric composite structure with sensing and also actuating capabilities, mainly as a MEMS device. The optimum between actuating and energy harvesting functions is difficult to obtain. The article is presenting a study regarding the posibility to optimize both functions, performed using an analytical model and also by simulation using a FEA model.

Fully Reversed Electric Fatigue Behavior of a Piezoelectric Composite Actuator

2008 ◽  
Author(s):  
Sung-Choong Woo ◽  
Nam Seo Goo
Keyword(s):  
Fatigue Damage ◽  
Fatigue Behavior ◽  
Damage Mechanism ◽  
Ceramic Layer ◽  
Piezoelectric Composite ◽  
Transgranular Fracture ◽  
Intergranular Cracking ◽  
Composite Actuator ◽  
Electric Fatigue ◽  
Pzt Ceramic

The aim of this study is to investigate fully reversed electric fatigue behavior of a piezoelectric composite actuator (PCA). For that purpose, fatigue tests with different loading conditions have been conducted and the performance degradation has been monitored. During a preset number of loading cycles, non-destructive acoustic emission (AE) tests were used for monitoring the damage evolution in real time. The displacement-cycle curves were obtained in fully reversed cyclic bending loading. The microstructures and fracture surfaces of PCA were examined to reveal their fatigue damage mechanism. The results indicated that the AE technique was applicable to fatigue damage assessment in the piezoelectric composite actuator. It was shown that the initial damage mechanism of PCAs under fully reversed electric cyclic loading originated from the transgranular fracture in the PZT ceramic layer; with increasing cycles, local intergranular cracking initiated and the either developed onto the surface of the PZT ceramic layer or propagated into the internal layer, which were some different depending on the drive frequencies and the lay-up sequence of the PCA.

scholarly journals Analysis and optimal design of a vibration isolation system combined with electromagnetic energy harvester

2019 ◽  
Vol 30 (16) ◽  
pp. 2382-2395
Author(s):  
Uchenna Diala ◽  
SM Mahdi Mofidian ◽  
Zi-Qiang Lang ◽  
Hamzeh Bardaweel
Keyword(s):  
Energy Harvesting ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Vibration Isolation ◽  
Energy Conversion Efficiency ◽  
Isolation System ◽  
Magnetic Components ◽  
Energy Harvesting System ◽  
Response Function Method ◽  
Conversion Efficiencies

This work investigates a vibration isolation energy harvesting system and studies its design to achieve an optimal performance. The system uses a combination of elastic and magnetic components to facilitate its dual functionality. A prototype of the vibration isolation energy harvesting device is fabricated and examined experimentally. A mathematical model is developed using first principle and analyzed using the output frequency response function method. Results from model analysis show an excellent agreement with experiment. Since any vibration isolation energy harvesting system is required to perform two functions simultaneously, optimization of the system is carried out to maximize energy conversion efficiency without jeopardizing the system’s vibration isolation performance. To the knowledge of the authors, this work is the first effort to tackle the issue of simultaneous vibration isolation energy harvesting using an analytical approach. Explicit analytical relationships describing the vibration isolation energy harvesting system transmissibility and energy conversion efficiency are developed. Results exhibit a maximum attainable energy conversion efficiency in the order of 1%. Results suggest that for low acceleration levels, lower damping values are favorable and yield higher conversion efficiencies and improved vibration isolation characteristics. At higher acceleration, there is a trade-off where lower damping values worsen vibration isolation but yield higher conversion efficiencies.

Electromechanical conversion efficiency of PZT films

2002 ◽  
Author(s):  
K.F. Etzold ◽  
R.A. Roy ◽  
K.L. Saenger ◽  
J.J. Cuomo
Keyword(s):  
Conversion Efficiency ◽  
Pzt Films ◽  
Electromechanical Conversion
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