Fig. 2: Temperature-sensitive and thermoelectric properties of hydrogel i-TECs.
From: N-type and P-type series integrated hydrogel thermoelectric cells for low-grade heat harvesting
a Transmittance of the N-type i-TEC containing 5 mM I3− with varying monomer mass ratios (mMAA:mDMAPS = 2:1, 5:2, 3:1, 4:1). b Transmittance of the P-type i-TEC containing 5 mM I3− with varying monomer mass ratios (mMAA:mDMAPS = 2:3, 1:2, 2:5, 1:3). c Photos of hydrogel i-TECs at different temperatures. d Schematics of the N-type i-TEC (hot-side temperature (Th) > phase transition temperature (Tp), cold-side temperature (Tc) < Tp). e Output voltage of the N-type i-TEC containing x mM I3− (x = 0.5, 1, 3, 5, 7) with the increase of the hot-side temperature. The cold-side temperature is maintained at 25 °C. f Seebeck coefficient (S) of the N-type i-TEC. g Schematics of the P-type i-TEC (Th > Tp, Tc < Tp). h Output voltage of the P-type i-TEC containing x mM I3− (x = 0.5, 1, 3, 5, 7) with the increase of the hot-side temperature. The cold-side temperature is maintained at 25 °C. i Seebeck coefficient (S) of the P-type i-TEC. The error bars were calculated using the standard deviation of the measured Seebeck coefficient.
