As a novel Mn3+-Mn4+ mixed valence system, hollandite-type compounds with chemical formula A x Mn8O16 (A = K, Rb, Ba, or Pb, etc. and x ≤ 2) have been enthusiastically pursued for their applications in fast ionic conductors, solid state electrolytes, oxidation catalysts, and stable host materials for radioactive ions from nuclear wastes [9 12].
From the results obtained, these ionogels can be considered potential candidates for electrochemical devices where high ionic conductivity in solid state materials is desirable.
Such studies assume importance in designing materials for solid state ionic devices.
The placement of reference electrodes in solid state ionic conductors is not as flexible as in liquid state electrochemistry.
Bimorph solid state ionic actuators were prepared with this novel hybrid material and compared with classical bucky gel actuators.
In the solid state ionic field, lattice strain is ubiquitous at heterostructural crystal interfaces and can lead to enormous variation in the transport efficiency of ions along the as-formed strained interfaces.
Solid state ionic devices based on high-temperature proton conductors can be used for various applications, especially in a new class of fuel cells, the Protonic Ceramic Fuel Cell (SOFC-H+).
The densification and grain growth of the solid state ionic conductor material Ce0.9Gd0.1O1.95−δ (i.e. GDC10, gadolinium-doped ceria, with Gd 10 mol.%) are analysed for nanometric and fine powders of various particle sizes, both in air and in a 9 vol.% H2 N2 mixture.
Mixed ionic and electronic conductors (MIECs) can be found in many applications of interest to solid state ionics, ranging from separation membranes, to solid oxide fuel cells and oxygen sensors.
Will Solid State Ionics survive?
Minami T.et al. (eds)Solid State Ionics for Batteries Springer (2005).
