Investigation of diamond-like carbon films as a promising dielectric material for triboelectric nanogenerator

Ramaswamy, Shreeharsha H.; Shimizu, Jun; Chen, Weihang; Kondo, Ryusei; Choi, Junho

doi:10.1016/j.nanoen.2019.03.095

Cited by 43 publications

(34 citation statements)

References 37 publications

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“…The significant findings in our previous work [31] on DLCbased CS-TENG provided us the necessary groundwork to investigate the DLC sliding-TENG attributing to its outstanding tribological, mechanical, and insulating characteristics of DLC films [32][33][34][35][36][37][38][39][40][41]. Apart from its well-known tribological and mechanical properties, DLC films possess high surface electrical resistivity ranging between 10 2 -10 16 Ω-m [42], low electron mobility (10 −11 -10 −12 cm 2 /V) owing to its amorphous nature, wide bandgap (1 -4 eV) [43] and high defect state density thus making the DLC film an ideal candidate for energy harvesting through contact electrification.…”

Section: Introductionmentioning

confidence: 79%

“…This suggests that H-DLC / PTFE pair may be a suitable combination for both high output efficiency and durability (discussed in the next section, 3.3.3). Our previous findings [31] suggest that the H-DLC could well be considered as an adequate replacement for Al attributing to its low friction, low wear, and better dielectric characteristics. On the other hand, the DLC vs. DLC pair produced a remarkably good output at moderate speed conditions.…”

Section: Evaluation Of Teng Output 331 Effect Of Various Dielectricmentioning

confidence: 93%

“…The durability evaluation was done at a frequency of 10 Hz and an applied load of 9.81 N for the duration of 2 h [31]. The Al / PTFE pair exhibited a highly unstable output behavior.…”

Section: Performance At Severe Operating Conditionmentioning

confidence: 99%

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Development of Highly Durable Sliding Triboelectric Nanogenerator Using Diamond-Like Carbon Films

et al. 2020

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Climate change is affecting every being on the planet. The time has arrived to give a big push for harvesting renewable energy sources, thus reducing the dependencies on fossil fuels and chemical batteries. This inspired Nanotechnologists to explore energy harvesting techniques from the environment. Triboelectric nanogenerator (TENG) is one such emerging, promising, and a reliable technology to extract micropower from the abundantly available natural mechanical energy. In this study, we have addressed the durability issues of TENG using Diamond-like Carbon (DLC) films as a triboelectric surface. Our findings indicate a high potential for DLC films for TENG applications attributing to its outstanding tribological, mechanical and insulating properties. Hydrogenated DLC (H-DLC) film, Fluorinated DLC (F-DLC) film, and PTFE were used as dielectric surfaces on a rotary based sliding-TENG. The output performance of each pair differed with the sliding frequency where H-DLC/F-DLC pair produced the maximum output at a moderate frequency of 4 Hz. As the frequency was raised, H-DLC/PTFE pair exhibited the highest output at 10 Hz, equal to that of the Al/PTFE pair. The durability evaluation of DLC-TENG showed very promising outcomes producing stable output current for 2 h. This study is expected to encourage the development of DLC-based sliding-TENGs, with enhanced durability and output efficiency.

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Section: Introductionmentioning

confidence: 79%

Section: Evaluation Of Teng Output 331 Effect Of Various Dielectricmentioning

confidence: 93%

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Development of Highly Durable Sliding Triboelectric Nanogenerator Using Diamond-Like Carbon Films

et al. 2020

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“…This atomic structure provides diamond with excellent mechanical properties, e.g., an ultrahigh hardness, high strength and unmatched wear resistance [1], which lead to the widespread industrial applications of diamond, ranging from cutting tools to bearings in microelectromechanical systems (MEMS) [2]. In addition, functional parts with sliding surfaces, e.g., piston rings [3] and triboelectric nanogenerators [4], are usually coated with a thin diamond film to enhance the wear resistance and consequently increase the service life. The latest report [5] declared that it can effectively reduce the discomfort experienced by patients when they undergo surgery by utilizing a scalpel coated with a diamond film because of its outstanding friction performance.…”

Section: Introductionmentioning

confidence: 99%

Load- and Size Effects of the Diamond Friction Coefficient at the Nanoscale

2020

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The friction coefficient, an important parameter to evaluate the dynamic properties of friction pairs, has been widely used in macro engineering fields. However, it is probably inappropriate to characterize the tribological properties at the nanoscale due to the strong size effect, and the conventional formula cannot reveal its determinants owing to its oversimple form. Therefore, in the present work, a new formula is deduced to overcome these shortcomings. The established formula for the friction coefficient considers the adhesion and discloses the relationship between the friction coefficient and the material properties of diamond. It effectively suppresses the dependency of the friction coefficient on the load, although such a dependency cannot be eliminated completely. Therefore, another new formula, independent of the loading force, is derived. Interestingly, the results indicate that the size effect is invariably observed in the friction coefficients derived from the three formulas due to different accumulation effects of debris atoms, which is verified by molecular dynamics simulations.

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“…The main advantage of the TENG is its effectiveness in harvesting mechanical energy or vibrations from our ambient environment at low cost, while retaining scalability to drive low-power, large scale, consumption systems [14]. To date, many researchers have studied the working mechanisms of the TENG and have shown enhancements in TENG output power while utilizing TENGs in various electronic, biomedical, and sensing applications [15][16][17][18][19]. Given that the working mechanism for vertical contact-mode TENGs and sliding-mode TENGs involves repeated contact and separation for energy production, multi-directional motions are difficult to effectively harvest [20].…”

Section: Introductionmentioning

confidence: 99%

Comb-structured triboelectric nanogenerators for multi-directional energy scavenging from human movements

Hwang

Jung

Choi

et al. 2019

Science and Technology of Advanced Materials

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A triboelectric nanogenerator (TENG) is an emerging energy harvesting technology utilizing multi-directional, wasted mechanical energies stemming from vibrations, winds, waves, body movements, etc. In this study, we report a comb-structured TENG (CTENG) capable of effectively scavenging multi-directional motions from human movements, which include walking, jumping, and running. By attaching CTENG to a person's calf, we obtain a rootmean-square (RMS) power value of 5.28 μW (i.e. 13.12 V and 0.4 μA) for 1 s during mild running action (~5 m/s), which is sufficient for powering 10 light emitting diodes (LEDs). We integrate a CTENG with a simple hand-held pendulum (HHP) system with a natural frequency of 5.5 Hz. The natural frequency and input energy of our HHP system can be easily controlled by changing the holder mass and initial bending displacement, thus producing different output behaviors for the CTENG. Under the optimal HHP-based CTENG system design, the maximum output reaches 116 V at 6.5 μA under 0.1 kg mass and 4 cm bending displacement conditions. The corresponding output energy is 52.7 μJ for an operation time of 10.8 s. Our HHP-CTENG system can sufficiently power 45 LEDs and shows different output performances by varying the driving velocity of a vehicle, thus demonstrating the possibility for a self-powered velocity monitoring system.

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Investigation of diamond-like carbon films as a promising dielectric material for triboelectric nanogenerator

Cited by 43 publications

References 37 publications

Development of Highly Durable Sliding Triboelectric Nanogenerator Using Diamond-Like Carbon Films

Development of Highly Durable Sliding Triboelectric Nanogenerator Using Diamond-Like Carbon Films

Load- and Size Effects of the Diamond Friction Coefficient at the Nanoscale

Comb-structured triboelectric nanogenerators for multi-directional energy scavenging from human movements

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