Some new facts on electrochemical reaction mechanism for transition metal oxide electrodes

✍ Scribed by Chunhua Chen; Ning Ding; Long Wang; Yan Yu; Ingo Lieberwirth

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 973 KB
• Volume: 189
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2008.10.052

✦ Synopsis

Transition metal oxides represent a new type of anode materials for lithium-ion batteries. Due to their high capacity (usually above 700 mAh g -1 ) and excellent cycleability, they have attracted much attention in recent years. Regarding the electrochemical reaction mechanism for this type of electrode, the conversion reaction mechanism proposed by Tarascon and co-workers is widely accepted, i.e. MO x + 2xLi M + xLi 2 O. Nevertheless, in our recent explorations, we have found some new phenomena which may help us to further understand the electrode reaction mechanism, and even pose a necessity to modify the current conversion reaction mechanism. These new phenomena can be summarized as electrochemical milling, capacity rise and no-metal-formation effects.