Table 3 MnO2 crystalline phase, conductivity (σ), Seebeck coefficient (S), power factor (σ S2), thermal conductivity (k), figure of merit (Z), unitless figure of merit (ZT) and temperature (T) for this work and literature
From: Thermoelectric Properties of Nano-Meso-Micro β-MnO2 Powders as a Function of Electrical Resistance
MnO2 phase | σ(S/cm) | S(μV/K) | σS 2(W/m∙K 2) | κ(W/m∙K) | Z(1/K) | ZT | T(K) | References |
|---|---|---|---|---|---|---|---|---|
β (NP) | 1.00 × 10 | −1.90 × 103 | 3.61 × 10−3 | 4.0 | 9.0 × 10−4 | 5.6 × 10−1 | 623 | [14] |
β (TF) | 1.00 × 10 | −3.00 × 102 | 9.00 × 10−5 | – | – | – | 300 | [9] |
γ (P) | 8.20 × 10−1 | −3.06 × 102 | 7.68 × 10−6 | – | – | – | 300 | [10] |
γ (P) | 1.79 | −2.00×102 | 7.16 × 10−6 | – | – | – | 300 | [11] |
β (NP) | 7.64×10−5 | −3.00×104 | 6.88 × 10−6 | – | – | – | 300 | [12] |
β (NP) | 1.27 × 10−4 | −2.00 × 104 | 5.09 × 10−6 | – | – | – | 300 | [12] |
β (NP) | 3.18 × 10−5 | −4.00 × 104 | 5.09 × 10−6 | – | – | – | 300 | [12] |
S4 β (NMμ) | 5.77 × 10−2 | −3.16 × 102 | 5.76 × 10−7 | 0.5153 | 1.12 × 10−6 | 3.28 × 10−4 | 293 | This work |
S6 β (NMμ) | 4.53 × 10−2 | −3.11 × 102 | 4.38 × 10−7 | 0.5137 | 8.53 × 10−7 | 2.50 × 10−4 | 293 | This work |
S4 β (NMμ) | 7.79 × 10−3 | −2.94 × 102 | 6.75 × 10−8 | 0.2096 | 3.22 × 10−7 | 9.46 × 10−5 | 294 | This work |
S6 β (NMμ) | 6.64 × 10−3 | −3.03 × 102 | 6.10 × 10−8 | 0.3417 | 1.78 × 10−7 | 5.23 × 10−5 | 293 | This work |
Mn(OH)2 (TF) | 2.00 × 10−6 | −1.29 × 10 | 3.33 × 10−14 | – | – | – | 523 | [13] |
Mn(OH)2 (TF) | 2.09 × 10−6 | −1.23 × 10 | 3.16 × 10−14 | – | – | – | 473 | [13] |
γ (TF) | 2.24 × 10−6 | −7.0 | 1.1 × 10−14 | – | – | – | 573 | [13] |