黄钾铁矾
插层(化学)
锂(药物)
相(物质)
电化学
无定形固体
无机化学
氧化还原
材料科学
反应机理
聚合物
无机聚合物
化学
化学工程
结晶学
电极
有机化学
物理化学
催化作用
内分泌学
工程类
医学
作者
M. Gnanavel,V. Pralong,Oleg I. Lebedev,V. Caignaert,P. Bazin,B. Raveau
摘要
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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