Effect of Manganese Dioxide Nanorods on the Thermoelectric Properties of Cement Composites

Ji, Tao; Zhang, Xiaoxin; Zhang, Xiong; Zhang, Yongjuan; Li, Weihua

doi:10.1061/(asce)mt.1943-5533.0002401

Cited by 46 publications

(22 citation statements)

References 46 publications

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“…Thus, the electrical conductivity can be calculated by the obtained current, voltage, and sizes of the PANI/MnO 2 composite or the cement-matrix composites containing the PANI/MnO 2 composite sample. The apparatus and method used to measure the Seebeck coefficient of the PANI/MnO 2 composite or the cement-matrix composites containing the PANI/MnO 2 composite sample were the same as those used for MnO 2 powder in our previous study, as shown in Figure 1 [23].…”

Section: Methodsmentioning

confidence: 99%

“…For example, Wei et al obtained a Seebeck coefficient of 100.28 µV/K by adding 5 wt.% Bi 2 O 3 powder to the cement paste [20]. Recently, a high Seebeck coefficient of −3085 µV/K was obtained by incorporating 5 wt.% nanostructured MnO 2 powder into the cement paste in our previous study [23]. The significantly increased Seebeck coefficient was mainly caused by the increased density of states of nanoparticles and increased interfaces in the hardened cement matrix [24][25][26][27].…”

Section: Introductionmentioning

confidence: 93%

“…However, the absolute value of the Seebeck coefficient of cement-based materials with these conductive thermoelectric components has difficulty going beyond 1000 µV/K. Metallic compounds, including Bi 2 Te 3 , Ca 3 Co 4 O 9 , Fe 2 O 3 , Bi 2 O 3 , ZnO, and MnO 2 , were also used to increase the Seebeck coefficient of the cement-based materials [19][20][21][22][23]. For example, Wei et al obtained a Seebeck coefficient of 100.28 µV/K by adding 5 wt.% Bi 2 O 3 powder to the cement paste [20].…”

Section: Introductionmentioning

confidence: 99%

“…The significantly increased Seebeck coefficient was mainly caused by the increased density of states of nanoparticles and increased interfaces in the hardened cement matrix [24][25][26][27]. However, these cementbased materials with large Seebeck coefficients exhibit low electrical conductivity, because of the low electrical conductivity of the semiconductor powders [23].…”

Section: Introductionmentioning

confidence: 99%

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Cement-Based Thermoelectric Device for Protection of Carbon Steel in Alkaline Chloride Solution

Liao

Zhang

et al. 2022

Materials

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The thermoelectric cement-based materials can convert heat into electricity; this makes them promising candidates for impressed current cathodic protection of carbon steel. However, attempts to use the thermoelectric cement-based materials for energy conversion usually results in low conversion efficiency, because of the low electrical conductivity and Seebeck coefficient. Herein, we deposited polyaniline on the surface of MnO2 and fabricated a cement-based thermoelectric device with added PANI/MnO2 composite for the protection of carbon steel in alkaline chloride solution. The nanorod structure (70~80 nm in diameter) and evenly dispersed conductive PANI provide the PANI/MnO2 composite with good electrical conductivity (1.9 ± 0.03 S/cm) and Seebeck coefficient (−7.71 × 103 ± 50 μV/K) and, thereby, increase the Seebeck coefficient of cement-based materials to −2.02 × 103 ± 40 μV/K and the electrical conductivity of cement-based materials to 0.015 ± 0.0003 S/cm. Based on this, the corrosion of the carbon steel was delayed after cathodic protection, which was demonstrated by the electrochemical experiment results, such as the increased resistance of the carbon steel surface from 5.16 × 102 Ω·cm2 to 5.14 × 104 Ω·cm2, increased charge transfer resistance from 11.4 kΩ·cm2 to 1.98 × 106 kΩ·cm2, and the decreased corrosion current density from 1.67 μA/cm2 to 0.32 μA/cm2, underlining the role of anti-corrosion of the PANI/MnO2 composite in the cathodic protection system.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cement-Based Thermoelectric Device for Protection of Carbon Steel in Alkaline Chloride Solution

Liao

Zhang

et al. 2022

Materials

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“…At present, carbon‐based materials (carbon fibers, 70 carbon nanotubes, 71 expanded graphite, 72 graphene 73 etc. ), metallic materials or metal oxides (steel fibers, 74 bismuth telluride, 75 nickel oxide, 76 iron oxide, 77 zinc oxide, 78 manganese oxide 79 etc.) have been attempted to be added to thermoelectric cementitious composites.…”

Section: Application Of Thermoelectric Technology In Pavement Energy ...mentioning

confidence: 99%

Recent advances in thermoelectric technology to harvest energy from the pavement

Jian

Zhou

Wang

et al. 2022

Intl J of Energy Research

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Summary Reducing the excessive use of fossil fuels and developing new sustainable energy sources are challenges and urgent issues people face today. Pavements are rich in thermal energy when exposed to the sun for long periods of time. Thermoelectric technology allows for the conversion of thermal and electrical energy from the temperature difference that exists between the pavement and the underground. Thermoelectric technology applied to pavements could not only harvest energy to power wireless sensors, LED lights or store it in supercapacitors, but also absorb the temperature of the pavement to reduce damage to the pavement. The review summarized previous pavement thermoelectric energy harvesting systems in the areas of the types, advantages and disadvantages, power generation, and economic benefits. Methods to improve the conversion efficiency of thermoelectric energy harvesting devices are discussed in detail, especially the optimization of the cold end, the external environment, and the structure. Starting from the properties of thermoelectric cementitious composites, the applications and future developments of thermoelectric cementitious composites are presented in more detail. The thermoelectric cementitious composites are grouped into thermoelectric pavement energy harvesting solid systems. Finally, the integrated use of thermoelectric generator and thermoelectric cementitious composites for road energy harvesting is proposed. The article provided directions and references for future research on thermoelectric technology in pavement energy harvesting.

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Unveiling the Remarkable Potential of Geopolymer‐Based Materials by Harnessing Manganese Dioxide Incorporation

Cai,

Yuan,

et al. 2023

Small

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Thermoelectric (TE) building materials have the potential to revolutionize sustainable architecture by converting temperature differences into electrical energy. This study introduces geopolymeric TE materials enhanced with manganese dioxide (MnO2) as a modifying agent. Calorimetric experiments examine the impact of MnO2 on geopolymerization. Mechanical tests show that adding MnO2 (up to 5% by weight) improves the geopolymer composite's strength, achieving a peak compressive strength of 36.8 MPa. The Seebeck effect of the MnO2‐modified geopolymeric composite is also studied. The inclusion of MnO2 boosts the Seebeck coefficient of the geopolymer, reaching a notable 4273 µV C−1 at a 5% MnO2 dosage. This enhancement is attributed to an increase in the density of states (DOS) and a reduction in relaxation time. However, excessive MnO2 or high alkali levels may adversely affect the Seebeck coefficient by lengthening the relaxation time.

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Effect of Manganese Dioxide Nanorods on the Thermoelectric Properties of Cement Composites

Cited by 46 publications

References 46 publications

Cement-Based Thermoelectric Device for Protection of Carbon Steel in Alkaline Chloride Solution

Cement-Based Thermoelectric Device for Protection of Carbon Steel in Alkaline Chloride Solution

Recent advances in thermoelectric technology to harvest energy from the pavement

Unveiling the Remarkable Potential of Geopolymer‐Based Materials by Harnessing Manganese Dioxide Incorporation

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