{"title":"Se-Doping on Co<sub>4</sub>S<sub>3</sub> Cathode Based on Soft Anion Chemistry to Enhance Magnesium Storage Performance.","authors":"Chenkai Hu, Haifeng Ying, Wenwei Zhang, Feiyang Chao, Dongyao Zhu, Shaohua Zhu, Qinyou An","doi":"10.1002/cphc.202400821","DOIUrl":null,"url":null,"abstract":"<p><p>Rechargeable magnesium batteries (RMBs) have gradually got attention due to the high theoretical capacity, low cost and high security. However, the lack of suitable cathode materials has been a major obstacle to the development of RMBs. Transition metal sulfides (TMSs) have been studied extensively because of their high theoretical specific capacity and other advantages. However, the diffusion rate of Mg<sup>2+</sup> in TMSs is slow and side reactions are easy to occur. In this work, soft anion doping strategy was adopted at Co<sub>4</sub>S<sub>3</sub> cathode material. After doping the appropriate content of Se, it showed the specific capacity of 248 mAh g<sup>-1</sup> at a current density of 100 mA g<sup>-1</sup>. The mechanism of magnesium storage was investigated by ex-situ technique. This work laid a foundation for researching cobalt-based sulfide in cathode materials of RMBs.</p>","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":" ","pages":"e202400821"},"PeriodicalIF":2.3000,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemphyschem","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/cphc.202400821","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/11/8 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Rechargeable magnesium batteries (RMBs) have gradually got attention due to the high theoretical capacity, low cost and high security. However, the lack of suitable cathode materials has been a major obstacle to the development of RMBs. Transition metal sulfides (TMSs) have been studied extensively because of their high theoretical specific capacity and other advantages. However, the diffusion rate of Mg2+ in TMSs is slow and side reactions are easy to occur. In this work, soft anion doping strategy was adopted at Co4S3 cathode material. After doping the appropriate content of Se, it showed the specific capacity of 248 mAh g-1 at a current density of 100 mA g-1. The mechanism of magnesium storage was investigated by ex-situ technique. This work laid a foundation for researching cobalt-based sulfide in cathode materials of RMBs.
可充电镁电池（RMB）因其理论容量高、成本低和安全性高而逐渐受到关注。然而，缺乏合适的阴极材料一直是可充电镁电池发展的主要障碍。过渡金属硫化物（TMS）因其理论比容量高和其他优点而被广泛研究。然而，Mg2+ 在 TMSs 中的扩散速度较慢，容易发生副反应。在这项研究中，Co4S3 阴极材料采用了软阴离子掺杂策略。掺入适当含量的 Se 后，在电流密度为 100 mA g-1 时，比容量达到 248 mAh g-1。通过原位技术研究了镁的储存机理。这项工作为研究人民币阴极材料中的钴基硫化物奠定了基础。
期刊介绍：
ChemPhysChem is one of the leading chemistry/physics interdisciplinary journals (ISI Impact Factor 2018: 3.077) for physical chemistry and chemical physics. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies.
ChemPhysChem is an international source for important primary and critical secondary information across the whole field of physical chemistry and chemical physics. It integrates this wide and flourishing field ranging from Solid State and Soft-Matter Research, Electro- and Photochemistry, Femtochemistry and Nanotechnology, Complex Systems, Single-Molecule Research, Clusters and Colloids, Catalysis and Surface Science, Biophysics and Physical Biochemistry, Atmospheric and Environmental Chemistry, and many more topics. ChemPhysChem is peer-reviewed.
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