Monoclinic iron hydroxy sulphate: A new route to electrode materials |
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| Authors: | M. Anji Reddy V. Pralong V. Caignaert U.V. Varadaraju B. Raveau |
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| Affiliation: | aLaboratoire CRISMAT, ENSICAEN, Université de Caen, CNRS, 6 Bd Maréchal Juin, F-14050 Caen, France;bMaterials Science Research Centre and Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India |
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| Abstract: | The monoclinic form of FeOHSO4 was prepared by dehydration of FeSO4·7H2O. We show that reversible insertion of up to  1Li/f.u. is possible in this compound at an average voltage of 3.2 V. The insertion/deinsertion is a biphasic process. The high voltage plateau, a reversible capacity of 110 mAh/g after 20 cycles and good cycling behavior make this compound an attractive positive electrode material for rechargeable Li-ion batteries, suggesting also that transition metal sulphates need to be explored. |
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| Keywords: | Iron hydroxy sulphate Li-ion batteries Cathode Lithium insertion |
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