CHED 1397 |
| The LiMn2O4 spinel is one of the most promising cathode materials for rechargeable lithium ion batteries because of its low cost, low toxicity, and high energy density. Recent studies have focused on the problem with capacity fading of this material upon cycling. The substitution of manganese ions for other metal ions have been shown to improve cycling stability. Cations such as Ni2+ and Cu2+ have been shown to be effective. Unfortunately, doping with low valent cations decreases the capacity due to a decrease in the amount of Mn3+ in the spinel. In the present study we prepared cobalt and aluminum doped materials of composition Li1+xCo2xAlxMn2-4xO4 (0.01≤x≤0.05) and studied their electrochemical properties. |
|
Undergraduate Research Poster Session: Physical Chemistry
2:00 PM-4:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster
Division of Chemical Education |