Deep Discharge Characteristics of LiMn2O4-dCld Cathode Material
US Army Communications, Electronics, Research, Development and Engineering Center (CERDEC) Aberdeen Proving Gounds United States
Pagination or Media Count:
A family of lithium manganese AB2O4-dXd materials was synthesized and evaluated as a cathode for lithium and lithium-ion electrochemical systems. The reversible region for the LiLixMn2O4-dCld electrochemical couple was found to be on the order of 0.05 x 1.75 in a two step thermodynamic charge-discharge profile. The high voltage twin plateau is centered on 3.95 volts and 4.35 volts and the low voltage plateau is centered on a potential of 2.85 volts. In comparison, LiLixMn2O4 non-doped lithium manganese-based AB2O4 spinel materials needs to be maintained at 0.05 x 1.00 and at a potential greater than 3.25 volts in order to maintain rechargeablity. Additionally, the ability to discharge the LiLixMn2O4-dCld electrochemical system below 3.25 volts increases the capacity of the lithium spinel electrochemical couple nearly twofold.