Fe saponite, a layered silicate for reversible lithium-ions storage with large diffusion coefficient  

作　　者：Jian Zhang Qing Yin Yunjia Wu Shuoxiao Zhang Kai-Jie Wang Jingbin Han 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing Advanced Innovation Center for Soft Matter Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China [2]Beijing Tongren Eye Center,Beijing Tongren Hospital,Beijing Ophthalmology&Visual Sciences Key Lab,Capital Medical University,Beijing 100730,China

出　　处：《Journal of Energy Chemistry》2022年第4期92-100,共9页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21671015 and U1707603);the Fundamental Research Funds for the Central Universities(XK1802-6,BHYC1702B,and XK1803-05);the Beijing Municipal Science&Technology Commission(Z191100002019013)。

摘　　要：A kind of layered Li;MSiO;material,Fe saponite with Na;pillaring (Na^(+)-FSAP) was developed as a lowcost and environment-friendly lithium-ion storage material.The Na^(+)-FSAP follows the insertion/deinsertion working mechanism accompanied by valence change of Fe from Fe^(1.86+) to Fe^(2.71+) (average value) after stabilization,and displays a specific capacity of 125 m Ah g^(-1) at 50 m A g^(-1) with retention ratio of 80.8%after 75 cycles.The Na^(+)-pillaring effect and abundant structural water in the gallery urge Li^(+) migrate rapidly,resulting in a large Li^(+) diffusion coefficient within a range of 10^(-6.5)–10^(-7.5) cm^(2)s^(-1).Thus,the Na^(+)-FSAP provides a model material to design electrode materials with rapid lithium-ion migration and has great potential to take place of polyanionic-type Li_(2)MSiO_(4)(M=Mn,Fe,Co) cathode materials.

关 键 词：Fe saponite Clay minerals Layered silicates Lithium-ion storage 

分 类 号：TB34[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]