Development of new electrode materials for thermo-electrochemical cells for waste heat harvesting

Бурмистров, И. Н.; Kovyneva, N. N.; Gorshkov, Nikolay; Gorokhovsky, Alexander; Durakov, A.; Artyukhov, Denis; Kiselev, Nikolay

doi:10.1016/j.ref.2019.02.003

Cited by 24 publications

(10 citation statements)

References 15 publications

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“…The thermo-electrochemical cell (TECs) also called as thermo cell or thermogalvanic cell [1,2,3], converting directly the thermal energy to electrical energy, is an attractive renewable energy device for harvesting the low-grade heat (e.g., waste heat from industry and vehicles, the heat from storage or computer system) due to advantages of low cost, simple configuration, direct energy conversion, and stable operation [4,5].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube-Graphene Hybrid Electrodes with Enhanced Thermo-Electrochemical Cell Properties

et al. 2019

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Carbon nanotube-Graphene (CNT-Gr) hybrids were prepared on stainless steel substrates by the electrophoretic deposition (EPD) to make the thermo-electrochemical cell (TEC) electrodes. The as-obtained TEC electrodes were investigated by the SEM, XRD, Raman spectroscopy, tensile, and surface resistance tests. These hybrid electrodes exhibited significant improved TEC performances compared to the pristine CNT electrode. In addition, these hybrid electrodes could be optimized by tuning the contents of the graphene in the hybrids, and the CNT-Gr-0.1 hybrid electrode showed the best TEC performance with the current density of 62.8 A·m−2 and the power density of 1.15 W·m−2, 30.4% higher than the CNT electrode. The enhanced TEC performance is attributed to improvements in the electrical and thermal conductivities, as well as the adhesion between the CNT-Gr hybrid and the substrate. Meanwhile, the relative conversion efficiency of the TECs can reach 1.35%. The investigation suggests that the growth of CNT-Gr hybrid electrodes by the EPD technique may offer a promising approach for practical applications of the carbon nanomaterial-based TEC electrodes.

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Section: Introductionmentioning

confidence: 99%

Carbon Nanotube-Graphene Hybrid Electrodes with Enhanced Thermo-Electrochemical Cell Properties

et al. 2019

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“…The high thermopower of a nickel electrode may be attributed to the nickel and hydroxides on the electrode surface. The possible decay process of transformation of three hydroxides and divalent nickel results in the 2.83 mV K –1 thermopower . The thermopower of different redox couples listed in Table is compared with the thermopower of thermoelectric materials in Figure …”

Section: Liquid-based Systemsmentioning

confidence: 99%

“…The possible decay process of transformation of three hydroxides and divalent nickel results in the 2.83 mV K −1 thermopower. 33 The thermopower of different redox couples listed in Table 1 is compared with the thermopower of thermoelectric materials in Figure 2. 8 Third, more and more researches are aiming to increase the I sc and lower the R T , which in turn can boost the power output.…”

Section: Liquid-based Systemsmentioning

confidence: 99%

Review of Liquid-Based Systems to Recover Low-Grade Waste Heat for Electrical Energy Generation

Cheng

Dai

et al. 2020

Energy Fuels

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A large amount of low-grade waste heat from industry is usually discarded. In order to recover the huge amount of waste heat for a sustainable society, extensive efforts have been made to develop high-performance and low-cost thermoelectric generators based on the Seebeck effect of solid semiconductors. In addition, liquid-based heat-to-electricity systems have been developed and demonstrated a good potential for practical applications. This Review aims to provide an overview of the newly developed liquid-based technologies for waste heat recovery, including thermo-electrochemical cells (TECs), thermally regenerative electrochemical cycles (TRECs), and thermo-osmotic energy conversion (TOEC) systems. The working principles of these technologies will be introduced, and the key factors affecting their performance will be discussed. A perspective to discuss the current challenges and application potential of each system and future research directions will be provided.

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“…The harvest of low-temperature waste heat is a widely studied topic nowadays. Thermo-electrochemical cells (thermocells or thermo-galvanic cells, (TECs)) are one of the cheapest means to convert low-grade waste heat into electricity [1][2][3][4]. Typically, a TEC is based on a redox electrolyte and two electrodes placed at different temperatures [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The conversion process is based on the temperature coefficient of the electrode potential or hypothetical Seebeck coefficient of the cells. The output voltage is proportional to the temperature difference between hot and cold electrodes because of the difference in entropy of the redox process for hot and cold electrodes [2,3]. The hypothetical Seebeck coefficient of thermo-electrochemical cells can be calculated by the following formula [4]:…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

Self Cite

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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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Development of new electrode materials for thermo-electrochemical cells for waste heat harvesting

Cited by 24 publications

References 15 publications

Carbon Nanotube-Graphene Hybrid Electrodes with Enhanced Thermo-Electrochemical Cell Properties

Carbon Nanotube-Graphene Hybrid Electrodes with Enhanced Thermo-Electrochemical Cell Properties

Review of Liquid-Based Systems to Recover Low-Grade Waste Heat for Electrical Energy Generation

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

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