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1.
Sci Rep ; 3: 1125, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23350032

RESUMO

A cobalt-based thermoelectric compound Ca(3)Co(2)O(6) (CCO) has been developed as new cathode material with superior performance for intermediate-temperature (IT) solid-oxide fuel cell (SOFC). Systematic evaluation has been carried out. Measurement of thermal expansion coefficient (TEC), thermal-stress (σ) and interfacial shearing stress (τ) with the electrolyte show that CCO matches well with several commonly-used IT electrolytes. Maximum power density as high as 1.47 W cm(-2) is attained at 800°C, and an additional thermoelectric voltage of 11.7 mV is detected. The superior electrochemical performance, thermoelectric effect, and comparable thermal and mechanical behaviors with the electrolytes make CCO to be a promising cathode material for SOFC.

2.
Adv Mater ; 24(15): 2047-50, 2012 Apr 17.
Artigo em Inglês | MEDLINE | ID: mdl-22422374

RESUMO

Nitrogen-doped carbon nanofiber webs (CNFWs) with high surface areas are successfully prepared by carbonization-activation of polypyrrole nanofiber webs with KOH. The as-obtained CNFWs exhibit a superhigh reversible capacity of 943 mAh g(-1) at a current density of 2 A g(-1) even after 600 cycles, which is ascribed to the novel porous nanostructure and high-level nitrogen doping.


Assuntos
Carbono/química , Fontes de Energia Elétrica , Lítio/química , Nanofibras/química , Nanotecnologia/métodos , Nitrogênio/química , Capacitância Elétrica , Eletrodos , Porosidade , Propriedades de Superfície
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