Modification of separators with neodymium oxide/graphene composite to enhance lithium-sulfur battery performance  

作　　者：Liyuan Zheng Zhijun Zhu Yutong Kuai Qiaotong Huang Mingkun Zhang Yi Wang Aiju Li 

机构地区：[1]School of Chemistry,South China Normal University,Guangzhou,510006,China [2]Department of Mechanic and Electronic Engineering,Zhongkai University of Agriculture and Engineering,Guangzhou,510225,China

出　　处：《Journal of Rare Earths》2024年第9期1730-1739,I0004,共11页稀土学报（英文版）

基　　金：Project supported by Guangzhou Science and Technology Project,China (201803020038);Guangdong Science and Technology Commissioner Project (GDKTP2020046700);Innovation and Entrepreneurship Training Program for University Students (202324040)。

摘　　要：Lithium-sulfur(Li-S) batteries have generated significant attention due to their high theoretical specific capacity and energy density among a host of energy storage power devices.Nevertheless,the lithium polysulfide dissolution shuttle that occurs within Li-S batteries will lead to capacity deterioration and inadequate cycling stability.In the paper,we proposed a measure to deal with the above problems by modifying the separator with Nd_(2)O_(3)/graphene composite in Li-S batteries.Graphene's special chemical properties and structural qualities make it an excellent choice for Li-S batteries.Meanwhile,Nd_(2)O_(3) has a strong binding affinity with lithium polysulfide due to its low electronegativity,which exhibits Lewis' s acidity and forms strong interactions with lithium polysulfide,which is strongly Lewis basic.By utilizing these advantageous properties,Li-S batteries assembling Nd_(2)O_(3)-decorated reduced graphite oxide modified polypropylene separators(Nd_(2)O_(3)/RGO/PP) demonstrate outstanding electrochemical performance,including a mere 0.0525% capacity attenuation rate under 2C during 1000 cycles and with exceptional rate performance of 614 mAh/g even at 3C.This study presents valuable knowledge for effectively modifying separators using rare earth oxides to incorporate graphene,ultimately promoting the practical application of Li-S batteries.

关 键 词：Lithium-sulfur battery Rare earths Neodymium oxide GRAPHENE Modified separator 

分 类 号：TB332[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]