Patent ID: 7011908

Claim:
A method of making a manganese mixed metal oxide cathode, comprising the steps of: selecting a bismuth compound from the group of bismuth compounds consisting of Bi 2 O 3 , Bi(OH) 3 or Bi metal; mixing said bismuth compound with MnO 2 ; heating said mixture in an annealing oven between 400° C. and 600° C. for at least 72 hours; forming a positive, active manganese bismuth mixed metal oxide compound having the general formula MnO y (Bi 2 O 3 ) x , where said subscript x is greater than 0.05 and less than 0.25 and said subscript y is about 2.0; drying said compound; and forming said cathode by mixing said compound with a conductive carbon and a binder.