| 摘要 |
An air-breathing cathode comprising (i) a conductive current collector; and (ii) a metal-ion conducting medium; characterised in that the cathode further comprises a metal oxide of formula (AA' )a(BB')bOc. wherein: A and A' are the same or different and are selected from the group consisting of RE (wherein RE is selected from yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium), magnesium, calcium, strontium, barium, lithium, sodium, potassium, indium, thallium, tin, lead, antimony and bismuth; B is selected from the group consisting of Ru, Ir, Os, Rh, Ti, Sn, Ge, Mn, Ta, Nb, Mo, W, Zr and Pb; B' is absent or is selected from the group consisting of Ru, Ir, Os, Rh, Ca, Mg, In, Tl, Sn, Pb, Sb, Bi, Ge, Ta, Nb, Mo, W, Zr or RE (wherein RE is as hereinbefore defined); c is from 3-11; the atomic ratio of (a+b):c is from 1 : 1 to 1 :2; the atomic ratio of a:b is from 1 : 1.5 to 1.5: 1 wherein at least one of A and A' is selected from an alkali metal, an alkaline earth metal and RE is disclosed. |
