The electrochemical behavior of a new cobalt‐substituted Li 2 O ‐ y MnO 2 ( y = 4) spinel phase is studied in liquid‐electrolyte lithium cells. The insertion electrode material was obtained by reacting the mixed carbonate Co 0.14 Mn 0.86 CO 3 with LiOH at 380°C. The spinel phase with Li 2.13 Co 0.57 Mn 3.66 O 9 composition was obtained by this procedure. This material shows an extended cycle life in lithium‐anode cells working at room temperature in a 3.3 to 2.3 V potential window. Cell capacity is retained by 80% after 200 cycles.
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Sánchez et al. (1997) studied this question.