Lanthanum strontium cobaltite as interconnect in oxide thermoelectric generators

Issues related to use of metallic interconnects in oxide thermoelectric generators (TEGs) need be addressed secure performance and durability. Metal suffer from high cost noble metals or chemical instability contact resistance non-noble metals, arising oxidation, evaporation, delamination the oxidising conditions ambient air at operating temperatures. This work introduces a stable highly conducting ceramic oxide, our case p-type lanthanum strontium cobaltite (La 0.6 Sr 0.4 CoO 3 , LSC) as interconnect. We verified thermochemical stability LSC with Ni 0.98 Li 0.02 O (Li–NiO) n-type Zn Al (Al–ZnO) examined electrical characteristics. An area specific (ASR c ) ?1800 ? cm 2 for direct p-n junction was reduced ?400 m? p-LSC-n temperature 300 °C, validating concept. The screen-printed LSC/Al–ZnO composite thin interconnect layer found decrease further ?260 attributed increased effective junction. La (LSC) forms ohmic between Li-doped NiO Al-doped ZnO oxides, decreases further. • thermoelectrics. NiO–La –ZnO assembly is chemically 1000 °C air. Screen-printed excellent adherence. LSC/Al-doped