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Citation: Li Ming, Yang Hua-Quan. Lithiation Behavior of α-Fe₂O₃ in LiOH Electrolyte Solution[J]. Acta Physico-Chimica Sinica, ;2000, 16(08): 735-740. doi: 10.3866/PKU.WHXB20000812 shu

Lithiation Behavior of α-Fe₂O₃ in LiOH Electrolyte Solution

Li Ming ,
Yang Hua-Quan

1.
Department of Chemistry,Peking University,Beijing 100871

Received Date: 23 December 1999
Available Online: 15 August 2000

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.
- α-Fe2O3,
- Fe3O4,
- Aqueous secondary lithium batteries,
- Ni-Fe batteries
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Lithiation Behavior of α-Fe2O3 in LiOH Electrolyte Solution

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通讯作者: 陈斌, bchen63@163.com

Lithiation Behavior of α-Fe₂O₃ in LiOH Electrolyte Solution