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Factors Influencing the Rate of Fe[sub 2]O[sub 3] Conversion Reaction

2007; Electrochemical Society; Volume: 10; Issue: 12 Linguagem: Inglês

10.1149/1.2783268

1944-8775

Feng Jiao, Jianli Bao, Peter G. Bruce,

Extraction and Separation Processes

The conversion reaction process shows a higher capacity than graphite (1000 mAh g -1 compared with 370 mAh g -1 ) but suffers from a number of problems, including low rate capability. Using mesoporous, nanoparticulate, and bulk Fe 2 O 3 , we examine the factors influencing the rate of the Fe 2 O 3 conversion electrode, demonstrating that electron transport to and within the particles is rate limiting. A composite electrode based on Fe 2 O 3 can store 700 mAh g -1 at 3000 mA g -1 (6 mAh cm -2 at 26 mA cm -2 ).