Jianping Ma, Jinyi Guo, Weizheng Li, Xiaohan Yang and Chengde Huang
{"title":"Sodium storage performance of a high entropy sulfide anode with reduced volume expansion†","authors":"Jianping Ma, Jinyi Guo, Weizheng Li, Xiaohan Yang and Chengde Huang","doi":"10.1039/D4TA05122J","DOIUrl":null,"url":null,"abstract":"<p >Metal sulfides are prominent candidates for sodium-ion battery (SIB) anodes owing to their high theoretical capacities and superior conductivities, but their performance is hindered by volume expansion during cycling. This study introduces an approach for mitigating these issues by incorporating high-entropy structures into sulfides. We synthesized a high-entropy sulfide (HES) (FeCoNiCuZn)In<small><sub>2</sub></small>S<small><sub>4</sub></small> (MS5) and medium- and low-entropy sulfides for comparison. Physical and chemical characterization confirmed the successful formation of the HES, the uniform distribution of elements and the presence of sulfur vacancies. We show that high-entropy doping alleviates volume expansion during cycling and enhances sodium storage capacity, thereby improving electrochemical performance. After 800 cycles at a current density of 1 A g<small><sup>−1</sup></small>, MS5 exhibits a reversible capacity of 412.7 mA h g<small><sup>−1</sup></small>. When the current density is increased to 5 A g<small><sup>−1</sup></small>, it can still stably cycle for 800 cycles with a capacity retention rate of up to 88%. Density functional theory calculations supported the experimental findings, indicating that the introduction of high-entropy structures enhances the structural stability and Na<small><sup>+</sup></small> migration, and increases the number of reactive sites. This study highlights the potential of HES materials for use in the anodes of next-generation SIBs, offering insights into their design and application in improved energy-storage solutions.</p>","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":" 44","pages":" 30629-30641"},"PeriodicalIF":10.7000,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ta/d4ta05122j","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Metal sulfides are prominent candidates for sodium-ion battery (SIB) anodes owing to their high theoretical capacities and superior conductivities, but their performance is hindered by volume expansion during cycling. This study introduces an approach for mitigating these issues by incorporating high-entropy structures into sulfides. We synthesized a high-entropy sulfide (HES) (FeCoNiCuZn)In2S4 (MS5) and medium- and low-entropy sulfides for comparison. Physical and chemical characterization confirmed the successful formation of the HES, the uniform distribution of elements and the presence of sulfur vacancies. We show that high-entropy doping alleviates volume expansion during cycling and enhances sodium storage capacity, thereby improving electrochemical performance. After 800 cycles at a current density of 1 A g−1, MS5 exhibits a reversible capacity of 412.7 mA h g−1. When the current density is increased to 5 A g−1, it can still stably cycle for 800 cycles with a capacity retention rate of up to 88%. Density functional theory calculations supported the experimental findings, indicating that the introduction of high-entropy structures enhances the structural stability and Na+ migration, and increases the number of reactive sites. This study highlights the potential of HES materials for use in the anodes of next-generation SIBs, offering insights into their design and application in improved energy-storage solutions.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.