Enhanced performance triboelectric nanogenerators based on solid polymer electrolytes with different concentrations of cations

Shi, Lin; Su, Dong; Xu, Hongsheng; Huang, Shuyi; Ye, Qikai; Liu, Shuting; Wu, Ting; Chen, Jinkai; Zhang, Shaomin; Li, Shijian; Wang, Xiaozhi; Jin, Hao; Kim, Jong Min; Luo, Jikui

doi:10.1016/j.nanoen.2019.103960

Cited by 67 publications

(43 citation statements)

References 56 publications

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“…Figure S7c (SI) shows the electrical output peak-to-peak voltage with respect to the response time of the measured FPNG device. From the generated peak-to-peak voltage with the response time, ∼17 ms was observed. ,, …”

Section: Resultsmentioning

confidence: 96%

LiTaO₃-Based Flexible Piezoelectric Nanogenerators for Mechanical Energy Harvesting

Manchi

Graham

Patnam

et al. 2021

ACS Appl. Mater. Interfaces

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Mechanical energy is one of the freely available green energy sources that could be harvested to meet the smallscale energy demand. Piezoelectric nanogenerators can be used to harvest the biomechanical energy that is available in everyday human life and power various portable electronics. Herein, a ferroelectric material, i.e., lithium tantalate (LiTaO 3 ), was synthesized and used to fabricate a flexible piezoelectric nanogenerator (FPNG). Generally, ferroelectric materials display a strong electrostatic dipole moment and high piezoelectric coefficient, thus resulting in enhanced electrical performance. First, LiTaO 3 nanoparticles were synthesized and loaded into poly(vinylidene difluoride) (PVDF) to form a piezoelectric film and then, the piezoelectric composite film was sandwiched between two aluminum electrodes to fabricate an FPNG. The effect of the electrical performance of FPNG as a function of the concentration of LiTaO 3 loaded into PVDF was systematically investigated and optimized. The 2.5 wt % FPNG exhibited open-circuit voltage, short-circuit current, and power density values of ∼18 V, ∼1.2 μA, and ∼25 mW/m 2 , respectively. Furthermore, the FPNG revealed good electrical stability and mechanical durability. Finally, the FPNG was employed as a weight sensor to harvest various biomechanical energies and operate low-power-electronics.

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Section: Resultsmentioning

confidence: 96%

LiTaO₃-Based Flexible Piezoelectric Nanogenerators for Mechanical Energy Harvesting

Manchi

Graham

Patnam

et al. 2021

ACS Appl. Mater. Interfaces

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“…Figure 5F shows the relationship between membrane conductivity and ionic liquid concentration, and the trend is opposite to those for current and voltage. Normally, the conductivity of the PIL membrane increases as the concentration of the ionic liquid increases 41 . However, conductivity is affected by other factors, such as chain mobility, crystallinity, and ion pairs 42 .…”

Section: Resultsmentioning

confidence: 99%

“…Normally, the conductivity of the PIL membrane increases as the concentration of the ionic liquid increases. 41 However, conductivity is affected by other factors, such as chain mobility, crystallinity, and ion pairs. 42 Therefore, at a low ionic concentration from 2.5 to 10 wt.%, membrane conductivity tends to decrease owing to the formation of the hydrogen bonds between PVDF-HFP polymer and [TFSI] anions, leading to a degree of the PVDF-HFP chain mobility.…”

Section: Performance Optimization Of Pil-tengmentioning

confidence: 99%

Enhancing the output performance of fluid‐based triboelectric nanogenerator by using poly(vinylidene fluoride‐co‐hexafluoropropylene)/ionic liquid nanoporous membrane

et al. 2021

Int J Energy Res

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Over the past few years, triboelectric nanogenerators (TENGs) have emerged as promising devices for energy harvesting and self-powered sensing owing to their miniaturized structural design, lack of material limitation, high stability, and ecofriendly nature. In this study, the membrane consisting of poly(vinylidene fluorideco-hexafluoropropylene) (PVDF-HFP) and ionic liquid (PIL) is fabricated as triboelectric material, namely PIL membrane. To further improve the hydrophobicity of the membrane and the output performance of the TENG, different PIL membranes are prepared using various IL concentrations and their structures are modified using the evaporation phase inversion technique. The PIL membranes with nanoporous structures and strong hydrophobicity are synthesized by blade coating and bent to generate circular tube shapes for use in PIL-TENG cells. Therefore, the PIL-TENG has a high output performance owing to the availability of more ions through the establishment of an electrical double layer and an increase in electronegativity properties by doping with more fluoride atoms. Under optimal conditions, a nanoporous PIL-TENG of 10 wt.% ionic liquid exhibited the maximum peak-to-peak with an output voltage of 16.95 V and current of 2.56 μA. Especially, the instantaneous peak power density of the PIL-TENG reached the highest value of 26.1 mW/m 2 , which was 212% higher than that of the pristine PVDF-HFP TENG (P-TENG). In this manner, a new material for the triboelectric layer is presented to effectively improve the output performance, stability, and durability of TENGs, which are promising for use in practical applications related to harvesting hydrokinetic energy, self-powered sensors, and other applications.

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“…To fully understand the effect of ion doping on TENG output performance, in 2019, Shi et al [63] proposed doping symmetric ion pair electrolyte into polyvinyl alcohol (PVA), obtaining an output voltage of ≈1345 V, short circuit current density of 260 mA m −2 , and maximum power density of ≈83 W m −2 , which are four times higher than that of undoped TENG. In the past two years, due to new technologies and deeper understanding of friction materials, more chemical modification methods have emerged.…”

Section: Evolution and Development Of Chemical Functionalization For mentioning

confidence: 99%

“…However, only electrolyte-CaCl 2 was used in the study and the effects of other inorganic salts on the performance of TENG was not investigated. Subsequently, Shi et al [63] doped electrolytes containing LiCl, ZnCl 2 , CaCl 2 , FeCl 3 and AlCl 3 with different cations in PVA to form SPEs and used them as positive friction materials while PTFE was used as another friction material to form the contact-separation mode TENG (Figure 15c). Compared with PTFE/PVA TENG, all PTFE/PVA-MCl TENG exhibited excellent triboelectric properties.…”

Section: Ion Dopingmentioning

confidence: 99%

Enhancement of Triboelectric Charge Density by Chemical Functionalization

Liu

et al. 2020

Adv Funct Materials

208

113

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A triboelectric nanogenerator (TENG) can convert energy in the surrounding environment to electricity. Therefore, in recent years, research related to TENGs has significantly increased owing to its simple and low-cost manufacturing process, high portability, and high efficiency. The principle of the TENG lies in the coupling effect of contact electrification and electrostatic induction. Its output performance is directly proportional to the square of the surface charge density, which is related to friction materials. To increase the output power of a TENG and continuously provide electricity for other electronic equipment, many scholars have conducted detailed studies on the triboelectric properties of materials. Particularly, there has been research interest in the chemical functionalization of TENGs due to their unique advantages, such as high triboelectric charge density, durability, stability, and self-cleaning properties. This Progress Report highlights the research progress in chemical modification methods for improving the charge density of TENGs, and classifies their modification methods according to their mechanisms. The effects of chemical reaction, surface chemical treatment, and chemical substance doping on the output performance of TENGs are systematically elaborated. Furthermore, the applications of chemically modified TENG in self-powered sensors and emerging fields, including wearable electronic devices, human-machine interfaces, and implantable electronic devices, are introduced. Lastly, the challenges faced in the future developments of chemical modification methods are discussed, thereby guiding researchers to the use of chemical modification methods for the improvement of charge density for further exploration.

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Enhanced performance triboelectric nanogenerators based on solid polymer electrolytes with different concentrations of cations

Cited by 67 publications

References 56 publications

LiTaO₃-Based Flexible Piezoelectric Nanogenerators for Mechanical Energy Harvesting

LiTaO₃-Based Flexible Piezoelectric Nanogenerators for Mechanical Energy Harvesting

Enhancing the output performance of fluid‐based triboelectric nanogenerator by using poly(vinylidene fluoride‐co‐hexafluoropropylene)/ionic liquid nanoporous membrane

Enhancement of Triboelectric Charge Density by Chemical Functionalization

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Enhanced performance triboelectric nanogenerators based on solid polymer electrolytes with different concentrations of cations

Cited by 67 publications

References 56 publications

LiTaO3-Based Flexible Piezoelectric Nanogenerators for Mechanical Energy Harvesting

LiTaO3-Based Flexible Piezoelectric Nanogenerators for Mechanical Energy Harvesting

Enhancing the output performance of fluid‐based triboelectric nanogenerator by using poly(vinylidene fluoride‐co‐hexafluoropropylene)/ionic liquid nanoporous membrane

Enhancement of Triboelectric Charge Density by Chemical Functionalization

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LiTaO₃-Based Flexible Piezoelectric Nanogenerators for Mechanical Energy Harvesting

LiTaO₃-Based Flexible Piezoelectric Nanogenerators for Mechanical Energy Harvesting