Investigation of the thermoelectric properties of La2CuO4 ceramics with the addition of Ag

Zhu, Chunhui; Gong, Jing; Li, Zhuangzhi; Zhou, Hong; Tang, Gongguo

doi:10.1016/j.physb.2014.08.016

Cited by 6 publications

(8 citation statements)

References 36 publications

(46 reference statements)

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“…We observe a decrease in activation energy of La 2 CuO 4 with Sr doping, which is due to an increase in charge carrier density 17 . This decrease in activation energy confirms the easy activation of charge carriers that leads to lower electrical resistivity in Sr‐doped pellets 19 . Again, above 250 K, the Seebeck coefficient is found to decrease as the temperature increases.…”

Section: Resultssupporting

confidence: 65%

“…On further increasing the Sr concentration ( x > 0.1) a significant increase in lattice parameters occurs which may be explained on the basis of the solubility limit of Sr in La 2 CuO 4. 15 As shown in Figure 1C, a shift in the peak position of prominent peaks towards lower 2 θ value may also be noticed with increasing Sr concentration, which confirms the substitution of Sr at La sites 19 . The crystalline size (D) and lattice strain (ɛ) have also been estimated using Williamson‐Hall plot 22 and are tabulated in Table 1.

β \cos θ = \frac{italickλ}{D} + ε (4 \sin θ),

where k is the shape factor and β is the full width at half maxima.…”

Section: Resultsmentioning

confidence: 60%

“…This change in the Seebeck coefficient can be more effectively visualised by plotting eST vs T graph (Figure 4B). A change in the slope is clearly visible near 250 K for both pure and Sr‐doped samples, which may be attributed as sample reaches in exhaustion zone near to 250 K 19 …”

Section: Resultsmentioning

confidence: 94%

“…17 This decrease in activation energy confirms the easy activation of charge carriers that leads to lower electrical resistivity in Sr-doped pellets. 19 Again, above 250 K, the Seebeck coefficient is found to decrease as the temperature increases. This change in the Seebeck coefficient can be more effectively visualised by plotting eST vs T graph (Figure 4B).…”

Section: Resultsmentioning

confidence: 96%

“…15 As shown in Figure 1C, a shift in the peak position of prominent peaks towards lower 2θ value may also be noticed with increasing Sr concentration, which confirms the substitution of Sr at La sites. 19 The crystalline size (D) and lattice strain (ϵ) have also been estimated using Williamson-Hall plot 22 and are tabulated in Table 1.…”

Section: Resultsmentioning

confidence: 99%

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Thermoelectric properties of Sr‐doped LSCO for energy harvesting applications below room temperature

Saif

Tripathi

2022

Energy Storage

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Thermoelectric properties of polycrystalline La 2 CuO 4 with (x = 0.0, 0.02, 0.05, 0.10, 0.15, 0.20) have been examined. For this, the samples have been synthesised via solid-state reaction (SSR) technique. For microstructural analysis of investigated pellets, X-ray diffraction and scanning electron microscopy have been performed. The electrical resistivity and Seebeck coefficient of the investigated samples have been measured with the help of an in-house fabricated setup, capable to measure the resistivity and thermopower between 100 and 400 K with ±3% experimental uncertainty. The electrical resistivity reveals a semiconducting nature for pristine pellets. However, a transition to metallic nature of electrical resistivity is observed for Sr doping concentration ≥ 0.02. The Seebeck coefficient (S) of investigated pellets is found to be positive, which indicates holes type conduction. Apart from that, a gradual decrease in the Seebeck coefficient has also been noticed as Sr dose increases. Again, the sample with Sr concentration x = 0.02 is found to be the best with a maximum power factor value (6.947 μW/cm K 2 ) at 165 K, which is a positive sign for future applicability of LSCO-based oxide materials for energy harvesting applications below room temperature.

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Section: Resultssupporting

confidence: 65%

β \cos θ = \frac{italickλ}{D} + ε (4 \sin θ),

where k is the shape factor and β is the full width at half maxima.…”

Section: Resultsmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

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Thermoelectric properties of Sr‐doped LSCO for energy harvesting applications below room temperature

Saif

Tripathi

2022

Energy Storage

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Thermoelectric properties of La_1.96Sr_0.04CuO₄ for energy harvesting and storage applications

Saif,

Tripathi

2023

Energy Storage

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The polycrystalline pellet of La2‐xSrxCuO4 with x = 0.04, has been sintered using the solid‐state reaction process. X‐ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) have been carried out for microstructural characterizations. The transport properties (electrical and thermal) of La2‐xSrxCuO4 for x = 0.04 have been investigated in the temperature range between 15 and 300 K with the aid of a closed‐cycle refrigerator (CCR). The DC four‐probe resistivity measurement confirms a decrease in resistivity with increasing temperature below 200 K. However, above 200 K, an increase in resistivity with temperature (metallic behaviour) has been noticed due to charge carrier localization. The Hall measurement conveys hole‐type conduction and phonon‐dominated mobility with carrier concentration ~1018/cm3, which lie somewhere between non‐degenerate and degenerate limit. The Seebeck coefficient also confirms hole type conduction and its temperature dependence can be explained in the light of the model applicable for mixed‐valence heavy fermions systems. The steady‐state method for thermal conductivity measurement has been employed. The plot of thermal conductivity (λ) as a function of temperature (T) shows a hump‐like structure at around 65 K, which may be attributed to an increase in the quasi‐particle mean free path. Further, the electronic and lattice (phononic) contributions to thermal conductivity have been separated using electrical conductivity data with the help of the Wiedemann‐Franz law. Our analysis confirms the phononic dominance in the thermal conductivity of the investigated sample. The figure of merit (ZT) estimated from the experimental data has a maximum value of 0.086 at 290 K and hence shows its inherent energy harvesting properties that can further be stored in a battery or capacitor.

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Metal Oxide Based Thermoelectric Materials

Okhay,

Tkach

2023

Optical Properties of Metal Oxide Nanostructures

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Investigation of the thermoelectric properties of La2CuO4 ceramics with the addition of Ag

Cited by 6 publications

References 36 publications

Thermoelectric properties of Sr‐doped LSCO for energy harvesting applications below room temperature

Thermoelectric properties of Sr‐doped LSCO for energy harvesting applications below room temperature

Thermoelectric properties of La_1.96Sr_0.04CuO₄ for energy harvesting and storage applications

Metal Oxide Based Thermoelectric Materials

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Investigation of the thermoelectric properties of La2CuO4 ceramics with the addition of Ag

Cited by 6 publications

References 36 publications

Thermoelectric properties of Sr‐doped LSCO for energy harvesting applications below room temperature

Thermoelectric properties of Sr‐doped LSCO for energy harvesting applications below room temperature

Thermoelectric properties of La1.96Sr0.04CuO4 for energy harvesting and storage applications

Metal Oxide Based Thermoelectric Materials

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Thermoelectric properties of La_1.96Sr_0.04CuO₄ for energy harvesting and storage applications