A micromachined carbon nanotube film cantilever-based energy cell

Nanofluid, a type of fluid with dispersed nanoparticles, has been studied and used as a direct absorber of solar or thermal energy for the past years. Herein, a fluidic energy generator enabled by a new type of nanofluid is developed, which has also been used to power a thermistor successfully. This type of nanofluid contains single-walled carbon nanotube-CuS nanoparticles (SWNT-CuS NPs) hybrid nanomaterial. Experiments found it has a significantly enhanced capability for the absorption and storage of the solar thermal energy compared to water. The fluidic energy generator enabled by 50 µL nanofluid can generate output voltage up to 100 µV, and thus can operate small electronic devices or sensors by directly converting the solar thermal energy into electricity.

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“…The following equation describes the voltage generated by the microenergy generator due to the Seebeck effect [7,9]:…”

Section: Device Description and Its Operationmentioning

confidence: 99%

“…Compared to SWNT [7], the SWNT-based hybrid nanomaterial shows improved capability for optical and thermal absorption [8][9]. Hence, it is anticipated that hybrid nanomaterial-based nanofluids could enhance the absorption and storage of solar and thermal energy significantly.…”

Section: Introductionmentioning

confidence: 99%

A fluidic microenergy generator enabled by hybrid nanomaterial nanofluids

Vasiraju

Que

2013

2013 Ieee Sensors

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“…This approach has evolved into the shape of a fiber or wire allowing integration with wearable garments [ 5 , 6 , 7 , 8 , 9 ]. Recently, nanogenerators based on different principles such as piezoelectric, light, triboelectric, and thermoelectric have been reported [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. Besides, stretchable batteries have been proposed using bridge-island design, winding fiber, stretchable fabric, etc.…”

Section: Introductionmentioning

confidence: 99%

Autonomous Energy Harvester Based on Textile-Based Enzymatic Biofuel Cell for On-Demand Usage

Seok

Wang

Lefeuvre

et al. 2020

Sensors

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This paper presents an autonomous energy harvester based on a textile-based enzymatic biofuel cell, enabling an efficient power management and on-demand usage. The proposed biofuel cell works by an enzymatic reaction with glucose in sweat absorbed by the specially designed textile for sustainable and efficient energy harvesting. The output power of the textile-based biofuel cell has been optimized by changing electrode size and stacking electrodes and corresponding fluidic channels suitable for following power management circuit. The output power level of single electrode is estimated less than 0.5 μW and thus a two-staged power management circuit using intermediate supercapacitor has been presented. As a solution to produce a higher power level, multiple stacks of biofuel cell electrodes have been proposed and thus the textile-based biofuel cell employing serially connected 5 stacks produces a maximal power of 13 μW with an output voltage of 0.88 V when load resistance is 40 kΩ. A buck-boost converter employing a crystal oscillator directly triggered by DC output voltage of the biofuel cell makes it possible to obtain output voltage of the DC–DC converter is 6.75 V. The efficiency of the DC–DC converter is estimated as approximately 50% when the output power of the biofuel cell is tens microwatts. In addition, LT-spice modeling and simulation has been presented to estimate power consumption of each element of the proposed DC–DC converter circuit and the predicted output voltage has good agreement with measurement result.

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“…The temperature difference between the two Si-Cu junctions (J1 and J2) is therefore formed, resulting in the power generation due to the different Seebeck coefficients of Si and Cu based on the thermoelectric mechanism. [8][9][10] Experimental methods…”

Section: Introductionmentioning

confidence: 99%

Hybrid nanomaterial-based nanofluids for micropower generation

Vasiraju

Que

2014

RSC Adv.

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This paper reports a new type of nanofluid, which is prepared by dispersing a hybrid nanomaterial single walled carbon nanotube-copper sulfide nanoparticles (SWNT-CuS NPs) into poly(styrene sulfonate) (PSS) solution, and its application for electricity generation. Its optical and thermal properties have been characterized, exhibiting significant improvement in optical extinction and temperature increase over water. In addition, a fluidic micropower generator is designed, fabricated and tested with the nanofluids of different concentrations. Measurements found that open circuit voltage by the fluidic micropower generator can be up to 1.6 mV with 900 mL nanofluid. Operation of a thermistor by the fluidic micropower generator has been demonstrated. Since hundreds and thousands of the micropower generators could be fabricated on a single chip by Si-based MEMS technology, the output power could be improved to the range of microwatts or milliwatts.

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A micromachined carbon nanotube film cantilever-based energy cell

Cited by 9 publications

References 34 publications

A fluidic microenergy generator enabled by hybrid nanomaterial nanofluids

A fluidic microenergy generator enabled by hybrid nanomaterial nanofluids

Autonomous Energy Harvester Based on Textile-Based Enzymatic Biofuel Cell for On-Demand Usage

Hybrid nanomaterial-based nanofluids for micropower generation

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