Abstract: A carbon coated lithium metal phosphate (LMP) having improved characteristics may be made by a method comprising (i) milling a slurry comprised of LMP precursors and water, removing the water to form a mixture comprised of milled precursors, heating the mixture to an intermediate temperature of 200° C. to less than 400° C. to form an intermediate, mixing the intermediate with a carbon precursor in a solvent that dissolves the carbon precursor, removing the nonaqueous solvent to form a coated intermediate, and heating the coated intermediate to a reaction temperature of at least 400° C. to 1000° C. in a non-oxidizing atmosphere to form the carbon coated lithium manganese iron phosphate. The method enables the formation of carbon coated lithium manganese iron phosphate with electrochemical performance approaching theoretical even at larger average primary particle size utilizing commercially practicable production methods.

Abstract: Substituted ramsdellite manganese dioxide (R—MnO2) compounds are provided, where a portion of the Mn is replaced by at least one alternative cation, or a portion of the O is replaced by at least one alternative anion. Electrochemical cells incorporating substituted R—MnO2 into the cathode, as well as methods of preparing the substituted R—MnO2, are also provided.

Abstract: Substituted ramsdellite manganese dioxide (R—MnO2) compounds are provided, where a portion of the Mn is replaced by at least one alternative cation, or a portion of the O is replaced by at least one alternative anion. Electrochemical cells incorporating substituted R—MnO2 into the cathode, as well as methods of preparing the substituted R—MnO2, are also provided.