ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2000,Vol.16>> Issue(08)>> 735-740     doi: 10.3866/PKU.WHXB20000812         中文摘要
Lithiation Behavior of α-Fe2O3 in LiOH Electrolyte Solution
Li Ming, Yang Hua-Quan
Department of Chemistry,Peking University,Beijing 100871
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The lithiation behavior of a-Fe_2O_3, is investigated at ambient-temperature in LiOH solutions by methods of cyclic voltammetry, IR and tracking XRD and ICP analyses. The results reveal that lithiation can take place to a small extent in α-Fe_2O_3 and its electrochemically synthesized product is Fe_3O_4 but lithiation process is limited by the unavoidable extrusion of iron in alkaline solutions. It is suggested that Li+ intercalation promotes iron's extrusion from α-Fe_2O_3 and Fe_3O_4, and that a coordination effect occurs between lithiation and iron extrusion, which shortens the steps of cyclic curves and improves the capacity significantly. These results are compared with experiments, in which α-Fe_2O_3 electrodes cycled in KOH solutions are tested by CV, XRD and ICP.

Keywords: α-Fe2O3   Fe3O4   Aqueous secondary lithium batteries   Ni-Fe batteries  
Received: 1999-12-23 Accepted: 2000-04-07 Publication Date (Web): 2000-08-15
Corresponding Authors: Yang Hua-Quan Email:

Cite this article: Li Ming, Yang Hua-Quan. Lithiation Behavior of α-Fe2O3 in LiOH Electrolyte Solution[J]. Acta Phys. -Chim. Sin., 2000,16 (08): 735-740.    doi: 10.3866/PKU.WHXB20000812
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