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Reference.org
Fast-ion conductor
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<p>In <a href="/facts/Materials_science/N5HrXRYW">materials science</a>, fast ion conductors are <a href="/facts/Solid/hj5UsXno">solid</a> <a href="/facts/Electrical_conductor/BSuyupLP">conductors</a> with highly mobile <a href="/facts/Ion/3bePpDna">ions</a>. These materials are important in the area of <a href="/facts/Solid_state_ionics/eG6BfH8p">solid state ionics</a>, and are also known as solid electrolytes and superionic conductors. These materials are useful in batteries and various sensors. Fast ion conductors are used primarily in <a href="/facts/Solid_oxide_fuel_cell/xmp3quI1">solid oxide fuel cells</a>. As solid electrolytes they allow the movement of ions without the need for a liquid or soft membrane separating the electrodes. The phenomenon relies on the hopping of ions through an otherwise rigid <a href="/facts/Crystal_structure/bJ4bCeHd">crystal structure</a>. </p>