Thermoelectric Properties of NaCo2 − x Fe x O y

Dutta, Biprodas; Battogtokh, Jugdersuren; Mckewon, David; Vidensky, Igor; Dutta, N. P.; Pegg, Ian L.

doi:10.1007/s11664-007-0241-2

Cited by 1 publication

(2 citation statements)

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“…Ca 3 Co 4 O 9 has a layer structures containing CoO 2 planes, thus forming a path for p-type electronic conduction, while the interfaces between every two adjacent layers and the other structural components scatter lattice phonons to reduce heat conductivity. Figure 4.14 shows the schematic structures of Ca 3 Co 4 O 9 [129][130][131][132] and Na x CoO 2 [133][134][135], which are two of the most promising thermoelectric oxides reported in the open literature. The CoO 2 planes in Ca 3 Co 4 O 9 are separated by a layer of Ca 2 CoO 3 to form a rock salt type structure (Fig.…”

Section: P-type Thermoelectric Oxidesmentioning

confidence: 99%

“…The introduction of lanthanide elements, including neodymium (Nd) [152], europium (Eu) [149], holmium (Ho), dysprosium (Dy), erbium (Er) [153], ytterbium (Y) [131] and lutetium (Lu) [153], increases [134,135]. Addition of gadolinium (Gd), dysprosium (Dy), holmium (Ho), and ytterbium (Y) is able to decrease thermal conductivity.…”

Section: P-type Thermoelectric Oxidesmentioning

confidence: 99%

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Waste Thermal Energy Harvesting (I): Thermoelectric Effect

Kong

Hng

et al. 2014

Waste Energy Harvesting

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Waste thermal energy (heat) is the second type of energy to be discussed. Usually, it is generated in a process by way of fuel combustion or chemical reaction, and then ''dumped'' into the environment even though it could still be reused for some useful and economic purpose. The essential quality of heat is not the amount but rather its ''value.'' The strategy of how to recover this heat depends in part on the temperature of the waste heat gases and the economics involved.Waste thermal energy is one of the largest sources of inexpensive, clean, and fuel-free energy available. The vast amount of heat that is discharged into the atmosphere everyday is one of the best sources of clean, fuel-free, and inexpensive energy. According to the US Department of Energy (DOE), up to 50 % of all fuels burned in the US goes unused into the atmosphere as waste heat is released to the atmosphere. Research indicates that the energy currently wasted by the industrial facilities in the U.S. could produce as much as 20 % of the total US electrical output with the associated 20 % reduction in greenhouse gas emissions. Various sources that can be classified as waste thermal energy (heat) with their properties are listed in Tables 4.1 , 4.2, 4.3, and 4.4 [1].Among the large quantities of waste heat that have been directly discharged into the Earth's environment, much of it is at temperatures which are too low to recover by using the conventional electrical power generators. Thermoelectric power generation, also known as thermoelectricity, has been demonstrated as a promising technology in the direct conversion of low-grade thermal energy, such as waste heat energy into electrical power. Probably, the earliest application is the utilization of waste heat from a kerosene lamp to provide thermoelectric energy to power a wireless device. Thermoelectric generators have also been used to provide small amounts electricity to remote regions, for instance, Northern Sweden, as an L. B. Kong et al., Waste Energy Harvesting, Lecture Notes in Energy 24,

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