Biomedical Engineering Reference
In-Depth Information
fabricate a direct oxidation SOFC (Thokchom et al., 2008). The anodic
structure comprises CeO
2
and Cu, contained in a porous YSZ-Al
2
O
3
(20 wt
%) composite layer. An interlayer consisting of YSZ-Al
2
O
3
(20 wt%)
electrolyte and lanthanum strontium manganate (LSM), and a cathode
consisting of LSM were employed. The rationale for the use of a
nanocomposite electrolyte from the YSZ-Al
2
O
3
system was based on its
enhanced conductivity,
improved mechanical
integrity, and cost as
compared to YSZ.
15.5
Future trends
The emerging field of renewable energy technologies requires materials for
fabricating various components with specific electrical properties.
Superionic conductors are needed for efficient energy storage and power
generation devices. Inexpensive mixed conductors can facilitate energy
harvesting from ambient vibrations. Catalytic materials that can enhance
reaction kinetics at lower temperatures are sought for energy conversion and
other industrial applications. The basic elements for power generation from
renewable energy sources are production, transmission, distribution, and
storage. Each of these elements requires materials with a specific
combination of electrical, mechanical, and thermal properties.
Nanocomposites provide intriguing ionic and electronic conductivities.
Tailored electrical conductivity of nanocomposites in combination with
desired mechanical and thermal properties can satisfy these needs. Future
trends in this field will be guided by the needs of renewable energy
technologies.
15.6 References
Angell C A (1986), 'Recent developments in fast ion transport in glassy and
amorphous materials,' Solid State Ionics, 18-19, 72-88.
Cho J and Liu M (1997), 'Preparation and electrochemical properties of glass-
polymer composite electrolytes in lithium battery,' Electrochem. Acta, 42(10),
1481-1488.
Croce F, Appetecchi G B, Persik L, and Scrosati B (1998), 'Nanocomposite polymer
electrolytes for lithium batteries,' Nature, 394, 456-458.
Dixon J M, LaGrange L D, Merten U, Miller C F, and Porter II J T (1963),
'Electrical resistivity of stabilized zirconia at elevated temperatures,' J.
Electrochem. Soc., 110(11), 276-280.
Kumar B (2007), 'Ionic transport through heterogeneous solids,' Trans. Ind. Ceram.,
66(3), 123-130.
Kumar B and Scanlon LG (1994),
'Polymer-ceramic composite electrolytes,' J.
Power Sources, 52, 261-268.
