Abstract
Spinel type Li1+xMn2-xO4(x=0.00-0.10)was chemically delithiated into Li0.5-0.9Mn2-xO4 by using Br2 as an oxidant. Li was extracted from Li1+xMn2-xO4 to Li0.5-0.9Mn2-xO4 keeping their spinet structure. The solubility of Mn into the electrolye is significantly large in Li-extracted Li1-xMn2O4 spinels. The discharge-charge behavior of Li/Li0.51Mn1.99O4 whose Li was extracted from Li0.99Mn1.99O4 showed different behaivor from that of Li/Li0.99Mn1.99O4, while that of Li/Li0.74Mn1.90O4 whose Li was extracted from Li1.10Mn1.90O4 was similar to that of Li/Li1.10Mn1.90O4. This shows that Li1.10Mn1.90O4 is the most stable composition in Li1+xMn2-xO4 spinl system.
