High Seebeck Coefficient Electrochemical Thermocells for Efficient Waste Heat Recovery

Zhou, Hongyao; Liu, Haodong

doi:10.1021/acsaem.8b00247

Cited by 48 publications

(50 citation statements)

References 50 publications

(74 reference statements)

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“…Thermoelectric generators, chiefly constructed with solid‐state semiconductors materials, rely on the conversion of thermal energy into electricity via Seebeck effect demanding spatial temperature gradient. To boost the output power of thermoelectric generators, although, as an alternatively promising strategy, thermocells have been applied to harvest waste heat based on electrons transfer between redox couples and electrodes due to the nature of relatively high Seebeck coefficient, such steady temperature variations are scarce in natural surroundings . On the contrary, pyroelectric generators (PyNGs) are subjected to time dependent temperature fluctuation so as to trigger the energy conversion processes .…”

Section: Multifunctional Skin‐interfaced Wearable Devicesmentioning

confidence: 99%

Multifunctional Skin‐Inspired Flexible Sensor Systems for Wearable Electronics

Takei

2019

Adv Materials Technologies

481

332

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Skin‐inspired wearable devices hold great potentials in the next generation of smart portable electronics owing to their intriguing applications in healthcare monitoring, soft robotics, artificial intelligence, and human–machine interfaces. Despite tremendous research efforts dedicated to judiciously tailoring wearable devices in terms of their thickness, portability, flexibility, bendability as well as stretchability, the emerging Internet of Things demand the skin‐interfaced flexible systems to be endowed with additional functionalities with the capability of mimicking skin‐like perception and beyond. This review covers and highlights the latest advances of burgeoning multifunctional wearable electronics, primarily including versatile multimodal sensor systems, self‐healing material‐based devices, and self‐powered flexible sensors. To render the penetration of human‐interactive devices into global markets and households, economical manufacturing techniques are crucial to achieve large‐scale flexible systems with high‐throughput capability. The booming innovations in this research field will push the scientific community forward and benefit human beings in the near future.

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Section: Multifunctional Skin‐interfaced Wearable Devicesmentioning

confidence: 99%

Multifunctional Skin‐Inspired Flexible Sensor Systems for Wearable Electronics

Takei

2019

Adv Materials Technologies

481

332

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“…Currently, researchers are focused on the [Fe(CN) 6 ] 3− /[Fe(CN) 6 ] 4− redox couple and carbon nanomaterials with high specific surface areas (carbon nanotubes and reduced graphene oxide) as they exhibit fast electron transfer kinetics and a hypothetical Seebeck coefficient of about 1.4 mV/K. The highest reported Seebeck coefficient of 9.9 mV/K has been demonstrated for a thermocell containing acetone and iso-propanol as the redox couple, when the vaporization entropy of acetone increases the total entropy change in the conversion of iso-propanol to acetone [13]. The highest hypothetical Seebeck coefficient for aqueous electrolyte-based thermocells (4.5 mV/K) and, accordingly, high open-circuit voltage values of up to 0.2 V have been presented in studies [14,15].…”

Section: Introductionmentioning

confidence: 99%

Harvesting Waste Thermal Energy Using a Surface-Modified Carbon Fiber-Based Thermo-Electrochemical Cell

et al. 2021

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An important direction in the development of energy saving policy is harvesting and conversion into electricity of low-grade waste heat. The present paper is devoted to the improvement of the efficiency of thermo-electrochemical cells based on carbon fiber electrodes and potassium ferri-/ferrocyanide redox electrolyte. The influence of the carbon fiber electrode surface modification (magnetron deposition of silver and titanium or infiltration implantation of nanoscale titanium oxide) on the output power and parameters of the impedance equivalent scheme of a thermo-electrochemical cell has been studied. Two kinds of cell designs (a conventional electrochemical cell with a salt bridge and a coin cell-type body) were investigated. It was found that the nature of the surface modification of electrodes can change the internal resistance of the cell by three orders of magnitude. The dependence of the equivalent scheme parameters and output power density of the thermoelectric cell on the type of electrode materials was presented. It was observed that the maximum power for carbon fiber modified with titanium metal and titanium oxide was 25.2 mW/m2 and the efficiency was 1.37%.

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“…Due to the increasing demand for the thermoelectric conversion, TEC cells with inexpensive and abundant materials are required. Until now, organic redox couples such as quinone/hydroquinone (quinhydrone) 10 and acetone/isopropanol 11 have been applied to TEC applications and large negative S e values in organic redox couples system were obtained, e.g. − 0.63 to − 9.9 mV K −1 .…”

Section: Introductionmentioning

confidence: 99%