{"title":"基于分子模拟的锰基和铁基钙离子电池电极材料的结构和离子动力学","authors":"Rachita Panigrahi, Bhabani S. Mallik","doi":"10.1007/s11581-025-06457-0","DOIUrl":null,"url":null,"abstract":"<div><p>Divalent intercalating metal ions, such as Mg<sup>2+</sup>, Zn<sup>2+</sup>, and Ca<sup>2+</sup>, in metal-ion batteries have garnered significant research interest with their remarkable capacity enhancement due to two electron transfer and low cost compared to lithium-ion batteries. The remarkable diffusivity and structural stability of some positive electrode materials, potentially significant for multivalent batteries, are the main reasons for using them in commercial batteries. In this work, we choose four materials with relatively fast ionic mobility, low energy diffusive barrier, and increased specific capacity. Calcium intercalation in positive electrode materials with the chemical formula Ca<sub>x</sub>M<sub>y</sub>O<sub>z</sub>, where M is the transition metal element (Fe, Mn), is investigated using density functional theory and classical molecular dynamics simulations. We have reported the structural, electronic, and transport properties of four cost-effective compounds such as Ca<sub>4</sub>Mn<sub>2</sub>O<sub>7</sub>, CaMn<sub>3</sub>O<sub>6</sub>, and CaFe<sub>2+n</sub>O<sub>4+<i>n</i></sub>(<i>n</i> = 0.25 and 0). First principle calculations reveal the atomistic structure and local chemical environment. The cation–anion interactions in these materials are analyzed by calculating radial distribution functions. The diffusion properties of Ca<sup>2+</sup> ions and conductivity in these solid materials were calculated using interatomic potential parameters in classical molecular dynamics, which reveal the ionic dynamics of these materials.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 8","pages":"8073 - 8084"},"PeriodicalIF":2.6000,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Structure and ionic dynamics of Mn- and Fe-based Ca-ion battery electrode materials from molecular simulations\",\"authors\":\"Rachita Panigrahi, Bhabani S. Mallik\",\"doi\":\"10.1007/s11581-025-06457-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Divalent intercalating metal ions, such as Mg<sup>2+</sup>, Zn<sup>2+</sup>, and Ca<sup>2+</sup>, in metal-ion batteries have garnered significant research interest with their remarkable capacity enhancement due to two electron transfer and low cost compared to lithium-ion batteries. The remarkable diffusivity and structural stability of some positive electrode materials, potentially significant for multivalent batteries, are the main reasons for using them in commercial batteries. In this work, we choose four materials with relatively fast ionic mobility, low energy diffusive barrier, and increased specific capacity. Calcium intercalation in positive electrode materials with the chemical formula Ca<sub>x</sub>M<sub>y</sub>O<sub>z</sub>, where M is the transition metal element (Fe, Mn), is investigated using density functional theory and classical molecular dynamics simulations. We have reported the structural, electronic, and transport properties of four cost-effective compounds such as Ca<sub>4</sub>Mn<sub>2</sub>O<sub>7</sub>, CaMn<sub>3</sub>O<sub>6</sub>, and CaFe<sub>2+n</sub>O<sub>4+<i>n</i></sub>(<i>n</i> = 0.25 and 0). First principle calculations reveal the atomistic structure and local chemical environment. The cation–anion interactions in these materials are analyzed by calculating radial distribution functions. The diffusion properties of Ca<sup>2+</sup> ions and conductivity in these solid materials were calculated using interatomic potential parameters in classical molecular dynamics, which reveal the ionic dynamics of these materials.</p></div>\",\"PeriodicalId\":599,\"journal\":{\"name\":\"Ionics\",\"volume\":\"31 8\",\"pages\":\"8073 - 8084\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2025-06-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ionics\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11581-025-06457-0\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ionics","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11581-025-06457-0","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Structure and ionic dynamics of Mn- and Fe-based Ca-ion battery electrode materials from molecular simulations
Divalent intercalating metal ions, such as Mg2+, Zn2+, and Ca2+, in metal-ion batteries have garnered significant research interest with their remarkable capacity enhancement due to two electron transfer and low cost compared to lithium-ion batteries. The remarkable diffusivity and structural stability of some positive electrode materials, potentially significant for multivalent batteries, are the main reasons for using them in commercial batteries. In this work, we choose four materials with relatively fast ionic mobility, low energy diffusive barrier, and increased specific capacity. Calcium intercalation in positive electrode materials with the chemical formula CaxMyOz, where M is the transition metal element (Fe, Mn), is investigated using density functional theory and classical molecular dynamics simulations. We have reported the structural, electronic, and transport properties of four cost-effective compounds such as Ca4Mn2O7, CaMn3O6, and CaFe2+nO4+n(n = 0.25 and 0). First principle calculations reveal the atomistic structure and local chemical environment. The cation–anion interactions in these materials are analyzed by calculating radial distribution functions. The diffusion properties of Ca2+ ions and conductivity in these solid materials were calculated using interatomic potential parameters in classical molecular dynamics, which reveal the ionic dynamics of these materials.
期刊介绍:
Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.