文献类型：期刊文献

中文题名：An ion-released MgI_(2)-doped separator inducing a LiI-containing solid electrolyte interphase for dendrite-free Li metal anodes

作者：Shan Yi[1];Zhe Su[1];Wanyu Zhang[1];Hongli Chen[1];Yayun Zhang[1];Bo Niu[1];Donghui Long[1,2]

机构：[1]State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Key Laboratory for Specially Functional Materials and Related Technology of the Ministry of Education,East China University of Science and Technology,Shanghai 200237,China

年份：2022

期号：12

起止页码：83

中文期刊名：Journal of Energy Chemistry

外文期刊名：能源化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；

基金：supported by the National Natural Science Foundation of China(22078100,22008073,and 52102098)。

语种：英文

中文关键词：Lithium metal anode;LiI-containing layer;Dendrite-free anode;Electrospun nanofiber separator

摘要：Lithium metal batteries are among the strong contenders to satisfy the ever-increasing needs of energy storage systems,which however suffer from poor composition of the solid electrolyte interphase(SEI)layer and uncontrolled Li dendrites formation.In this regard,we report on the design of an ionreleased MgI_(2)-doped polyacrylonitrile(PAN)based nanofiber(MPANF)separator,which can lead to conducive SEI layer and dendrite-free Li anode.The combination of the lithophilic MgI_(2)nanoparticles with polarized PAN matrix comprehensively functions as a high-compatible interpenetrating network to homogenize ionic transportation and confront dendrite growth.The released I ions introduce the highion-conductivity LiI into SEI layer,which could induce the formation of favorable and protective interface layer in the early stage,as embodied in the enrichment of advantageous components such as LiN_(x)O_(y),Li_(2)O,LiF,and Li_(3)N.Profited from the high-affinity MPANF separator,the Li||Li symmetric cell achieves an ultralow voltage hysteresis of 46 mV with an extended lifespan of 580 h.And a prolonged lifetime of 590cycles with an enhanced specific capacity of 140.1 m Ah g^(-1)and the Coulombic efficiency of 96.2%at 1C can be obtained in full cells.This work may offer a facile and high-affinity alternative to traditional polymeric separators for high-performance and dendrite-free Li metal batteries.