Journal
CHEMISTRY OF MATERIALS
Volume 26, Issue 15, Pages 4521-4527Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm501735t
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Funding
- IFCPAR (Indo-French Centre for the Promotion of Advanced Research/Centre Franco-Indien Pour la Promotion de la Recherche Avancee) [4608/2]
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Insertion of lithium into the jarosite hydroxysulfate NaFe3(SO4)(2)(OH)(6) leads to an amorphous phase Li2+xNaFe3-(SO4)(2)(OH)(6) (with 0 < x<0.5), through a biphasic mechanism. The latter phase exhibits reversible electrochemical lithium intercalation/deintercalation through a solid-solution-like process, leading back to the oxidized jarosite LixNaFe3(SO4)(2)(OH)(6) (with 0.3 < x < 0.6), with redox cycling at 2.82 V and a capacity of 110 mAh/g at C/20. This unique topotactic reaction between an amorphous and a well-crystallized phase is interpreted on the basis of the formation of an inorganic polymer.
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