METHOD FOR PREPARING ELECTROLYTIC MANGANESE DIOXIDE

Disclosed herein is an improved cathode material having the general formula of Li1+xMn2-x-y-zMyM'zO4 where x is generally less than 0.25, y is less than about 0.5, z is between about 0.1 and about 0.7, M is a trivalent transition metal, M' is a divalent transition metal. Also disclosed is...

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Bibliographic Details
Main Authors STORY, PHILLIP M, JEGADEN, LAURIE I
Format Patent
LanguageEnglish
French
Published 23.03.2023
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Summary:Disclosed herein is an improved cathode material having the general formula of Li1+xMn2-x-y-zMyM'zO4 where x is generally less than 0.25, y is less than about 0.5, z is between about 0.1 and about 0.7, M is a trivalent transition metal, M' is a divalent transition metal. Also disclosed is an improved secondary battery having a cathode material of the general formula of Li1+xMn2-x-y-zMyM'zO4. In one embodiment, the method provides for the preparation of a solution of Mn++ ions by dissolving manganese metal, typically in the form of powder or chips, in a mineral acid. The final concentration of Mn++ in solution will be between about 20 g/L to about 254 g/L. Typically, the solution will contain about 47 g/L of Mn++. The final pH of the solution containing Mn++ may range between about two and about eight; however, a typical operational pH will be between about 5.5 and about 7Ø Est divulgué un matériau de cathode amélioré présentant la formule générale de Li1+xMn2-x-y-zMyM'zO4, x étant généralement inférieur à 0,25, y étant inférieur à environ 0,5, z étant compris entre environ 0,1 et environ 0,7, M étant un métal de transition trivalent, M' étant un métal de transition divalent. Est également divulguée une batterie secondaire améliorée comportant un matériau de cathode de la formule générale de Li1+xMn2-x-y-zMyM'zO4. Selon un mode de réalisation, le procédé permet la préparation d'une solution d'ions Mn++ par dissolution de manganèse métallique, habituellement sous la forme de poudre ou de copeaux, dans un acide minéral. La concentration finale de Mn++ dans la solution sera entre environ 20 g/L et environ 254 g/L. Habituellement, la solution contiendra environ 47 g/L de Mn++. Le pH final de la solution contenant Mn++ peut aller d'environ deux à environ huit; cependant, un pH opérationnel habituel sera entre environ 5,5 et environ 7,0.
Bibliography:Application Number: CA20223231998