(FeO)2FeBO3 nanoparticles attached on interconnected nitrogen-doped carbon nanosheets serving as sulfur hosts for lithium-sulfur batteries

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外文摘要：There are still many challenges including low conductivity of cathodes,shuttle effect of polysulfides,and significant volume change of sulfur during cycling to be solved before practical applications of lithium-sulfur(Li-S)batteries.In this work,(FeO)2FeBO3 nanoparticles(NPs)anchored on interconnected nitrogen-doped carbon nanosheets(NCNs)were synthesized,serving as sulfur carriers for Li-S batteries to solve such issues.NCNs have the cross-linked network structure,which possess good electrical conductivity,large specific surface area,and abundant micropores and mesopores,enabling the cathode to be well infiltrated and permeated by the electrolyte,ensuring the rapid electron/ion transfer,and alleviating the volume expansion during the electrochemical reaction.In addition,polar(FeO)2FeBO3 can enhance the adsorption of polysulfides,effectively alleviating the polysulfide shuttle effect.Under a current density of 1.0 A·g-1,the initial discharging and charging specific capacities of the(FeO)2FeBO3@NCNs-2/S electrode were obtained to be 1113.2 and 1098.3 mA·h·g-1,respectively.After 1000 cycles,its capacity maintained at 436.8 mA·h·g-1,displaying a decay rate of 0.08％per cycle.Therefore,combining NCNs with(FeO)2FeBO3 NPs is conducive to the performance improvement of Li-S batteries.

外文关键词：

(FeO)2FeBO3nitrogen-doped carbonnanosheetcathodelithium-sulfur battery

作者：

Junhai Wang、Huaqiu Huang、Chen Chen、Jiandong Zheng、Yaxian Cao、Sang Woo Joo、Jiarui Huang

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作者单位：

School of Material and Chemical Engineering,Chuzhou University,Chuzhou 239000,China

College of Mechanical Engineering,Tongling University,Tongling 244000,China

Key Laboratory of Functional Molecular Solids of the Ministry of Education,College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241002,China

School of Mechanical Engineering,Yeungnam University,Gyeongsan,Gyeongbuk 38541,Republic of Korea

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基金：

National Research Foundation of Korea,the Initial Scientific Research Fund in Tongling UniversityNational Research Foundation of Korea,the Initial Scientific Research Fund in Tongling UniversityKey Research and Development Program of WuhuCollege Student Innovation and Entrepreneurship Training Program Project

项目编号：

2022tlxyrc18NRF-2019R1A5A80802902023yf0812023CXXL101

出版年：

2024

DOI：

10.1007/s11706-024-0683-y

材料学前沿

高等教育出版社

材料学前沿

CSTPCD

影响因子：0.337

ISSN：2095-025X

年,卷(期)：2024.18(2)