Nanochain LiMn2O4 as ultra-fast cathode material for aqueous rechargeable lithium batteries

Nanochain LiMn2O4 was prepared by a starch-assisted sol-gel method. Its electrochemical behavior as a cathode material for aqueous rechargeable lithium batteries (ARLBs) was characterized by cyclic voltaammograph, capacity measurement and cycling test. Results show that the nanochain LiMn2O4 has an ultra-fast charge capability. It presents a reversible capacity of 110 mAh/g at 4.5 C and 95 mAh/g even at 91 C in 0.5 mol/l Li2SO4 aqueous electrolyte. When charged at 136 C, 84% capacity could be obtained. In addition, its cycling behavior is also very good. After 200 cycles at 4.5 C, there is no evident capacity fading. (C) 2010 Elsevier B.V. All rights reserved.