Composite dimensional manganese oxides CDMOs

Manganese dioxide, Mn02, (MDO) is a widely used as material in primary electrochemical cells. It is the positive electrode of the zinc-MnOa cell, invented in 1866 by the French engineer Georges-Lionel Leclanche [11]. Li-MnOa battery was developed by Sanyo in 1975 [12] as low-power supplies for watches, calculators and memory backups. The poor cyclability of MDOs observed at that time [13] has been improved by preparing composite dimensional manganese oxides (CDMOs) for the development of flat-type secondary batteries. Table 6.2 lists the chemical formula of selected Li-Mn-O compounds used in Li batteries. 

Nohma et al. [29] have shown that, if Mn02 contained a small amount of hthium in its crystal structure beforehand, the electrochemical reversibihty would be improved. Several composite dimensional manganese oxides (CDMOs) were prepared by reacting LiOH with Mn02. The XRD patterns of the product prepared from various Li/Mn atomic ratios are shown in Fig. 6.4. 

Nohma T, Saito T, Fumkawa N, Ikada H (1989) Manganese oxides for a lithiiun secondary battery. Composite dimensional manganese oxide (CDMO). J Power Sourc 26 389-396... 

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