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

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外文摘要：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 Nd2O3/graphene composite in Li-S batteries.Graphene's special chemical properties and structural qualities make it an excellent choice for Li-S batteries.Meanwhile,Nd2O3 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 Nd2O3-decorated reduced graphite oxide modified polypropylene separators(Nd2O3/RGO/PP)demonstrate outstanding electrochemical perfor-mance,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.

外文关键词：

Lithium-sulfur batteryRare earthsNeodymium oxideGrapheneModified separator

作者：

Liyuan Zheng、Zhijun Zhu、Yutong Kuai、Qiaotong Huang、Mingkun Zhang、Yi Wang、Aiju Li

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作者单位：

School of Chemistry,South China Normal University,Guangzhou,510006,China

Department of Mechanic and Electronic Engineering,Zhongkai University of Agriculture and Engineering,Guangzhou,510225,China

基金：

Guangzhou Science and Technology Project,ChinaGuangdong Science and Technology Commissioner ProjectInnovation and Entrepreneurship Training Program for University Students

项目编号：

201803020038GDKTP2020046700202324040

出版年：

2024

DOI：

10.1016/j.jre.2023.09.006

稀土学报(英文版)

中国稀土学会

稀土学报(英文版)

CSTPCDEI

影响因子：1.3

ISSN：1002-0721

年,卷(期)：2024.42(9)