Delithiation of LiMn2O4 by Chemical Oxidation Method and its Cathode Properties for Lithium Secondary Battery
電池材料 LiMn2O4の化学酸化によるLi脱離とリチウム二次電池正極

Keita Uchiyama, Yasuo Takeda, Nobuyuki Imanishi, Osamu Yamamoto, Mitsuharu Tabuchi
2000 Journal of the Japan Society of Powder and Powder Metallurgy  
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
more » ... i was extracted from Li1.10Mn1 .90O4 was similar to that of Li/Li1.10Mn1.90O4. This shows that Li1.l0Mn1.90O4 is the most stable composition in Li1+xMn2-xO4 spinl system.
doi:10.2497/jjspm.47.103 fatcat:6cptpf3v6bf3hflqwjxrooqiq4