Giant Seebeck coefficient thermoelectric device of MnO₂powder

We report a giant Seebeck coefficient (S) thermoelectric (TE) material—MnO2 powder—and the design of a practical MnO2 TE generator to light up a regular light emitting diode (LED). The S of MnO2 powder was measured to be higher than 20 000 μV K−1, which is about 100 times higher than the state-of-the-art of Bi2Te3, one of the best TE materials. The giant S is very possibly closely related to the surface density of the electronic state (DOS), the...