Rational Design Strategy of Multicomponent Si/FeSeOx@N‐Doped Graphitic Carbon Hybrid Microspheres Intertwined with N‐Doped Carbon Nanotubes as Anodes for Ultra‐Stable Lithium‐Ion Batteries
Herein, an efficient synthesis approach is introduced for the fabrication of a hybrid anode consisting of porous microspheres with biphasic silicon (Si)‐amorphous iron selenite (Si/FeSeOx) nanocrystals enveloped within an N‐doped graphitic carbon (NGC) matrix and encased by well‐grown, highly intert...
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Wiley-VCH
2025-04-01
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| Series: | Small Structures |
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| Online Access: | https://doi.org/10.1002/sstr.202400354 |
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| author | Jae Seob Lee Jung Yeon Kim Hyun Seon Ahn Hye Seon Ka Rakesh Saroha Do Won Jeong Yun Chan Kang Dong‐Won Kang Jung Sang Cho |
| author_facet | Jae Seob Lee Jung Yeon Kim Hyun Seon Ahn Hye Seon Ka Rakesh Saroha Do Won Jeong Yun Chan Kang Dong‐Won Kang Jung Sang Cho |
| author_sort | Jae Seob Lee |
| collection | DOAJ |
| description | Herein, an efficient synthesis approach is introduced for the fabrication of a hybrid anode consisting of porous microspheres with biphasic silicon (Si)‐amorphous iron selenite (Si/FeSeOx) nanocrystals enveloped within an N‐doped graphitic carbon (NGC) matrix and encased by well‐grown, highly intertwined N‐doped carbon nanotubes (CNTs) (Si/FeSeOx@NGC/N‐CNT). Si and FeSeOx serve as the active components, contributing to the overall discharge capacity of the hybrid anode. Additionally, FeSeOx not only enhances the structural integrity of the nanostructure by channelizing the drastic volume variation of Si, but also expedites the diffusion of lithium ions, thereby promoting kinetically favored redox reactions. The NGC matrix serves as the primary pathway for efficient electron transfer within the electrode, whereas the well‐grown N‐CNTs network acts as a secondary pathway for subsequent electron transfer to the current collector. The porous structure achieved via selective removal of amorphous carbon ensures the smooth diffusion of charged species by shortening the effective charge diffusion length and accommodating the substantial volume changes during cycling. Correspondingly, the Si/FeSeOx@NGC/N‐CNT anodes demonstrate significant enhancements in electrochemical performance, including one‐order higher diffusion coefficients (≈10−12 cm2 s−1), exceptional rate capability (till 30 A g−1), and extraordinary cycling stability at 0.5, 1.0, and 3.0 A g−1. |
| format | Article |
| id | doaj-art-ba7594a941024cf58b96076baeeadf1f |
| institution | OA Journals |
| issn | 2688-4062 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj-art-ba7594a941024cf58b96076baeeadf1f2025-08-20T02:16:55ZengWiley-VCHSmall Structures2688-40622025-04-0164n/an/a10.1002/sstr.202400354Rational Design Strategy of Multicomponent Si/FeSeOx@N‐Doped Graphitic Carbon Hybrid Microspheres Intertwined with N‐Doped Carbon Nanotubes as Anodes for Ultra‐Stable Lithium‐Ion BatteriesJae Seob Lee0Jung Yeon Kim1Hyun Seon Ahn2Hye Seon Ka3Rakesh Saroha4Do Won Jeong5Yun Chan Kang6Dong‐Won Kang7Jung Sang Cho8Department of Engineering Chemistry Chungbuk National University Chungbuk 28644 Republic of KoreaDepartment of Engineering Chemistry Chungbuk National University Chungbuk 28644 Republic of KoreaDepartment of Engineering Chemistry Chungbuk National University Chungbuk 28644 Republic of KoreaDepartment of Engineering Chemistry Chungbuk National University Chungbuk 28644 Republic of KoreaDepartment of Engineering Chemistry Chungbuk National University Chungbuk 28644 Republic of KoreaDepartment of Engineering Chemistry Chungbuk National University Chungbuk 28644 Republic of KoreaDepartment of Materials Science and Engineering Korea University Anam‐Dong Seongbuk‐Gu Seoul 02841 Republic of KoreaSchool of Energy Systems Engineering Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Engineering Chemistry Chungbuk National University Chungbuk 28644 Republic of KoreaHerein, an efficient synthesis approach is introduced for the fabrication of a hybrid anode consisting of porous microspheres with biphasic silicon (Si)‐amorphous iron selenite (Si/FeSeOx) nanocrystals enveloped within an N‐doped graphitic carbon (NGC) matrix and encased by well‐grown, highly intertwined N‐doped carbon nanotubes (CNTs) (Si/FeSeOx@NGC/N‐CNT). Si and FeSeOx serve as the active components, contributing to the overall discharge capacity of the hybrid anode. Additionally, FeSeOx not only enhances the structural integrity of the nanostructure by channelizing the drastic volume variation of Si, but also expedites the diffusion of lithium ions, thereby promoting kinetically favored redox reactions. The NGC matrix serves as the primary pathway for efficient electron transfer within the electrode, whereas the well‐grown N‐CNTs network acts as a secondary pathway for subsequent electron transfer to the current collector. The porous structure achieved via selective removal of amorphous carbon ensures the smooth diffusion of charged species by shortening the effective charge diffusion length and accommodating the substantial volume changes during cycling. Correspondingly, the Si/FeSeOx@NGC/N‐CNT anodes demonstrate significant enhancements in electrochemical performance, including one‐order higher diffusion coefficients (≈10−12 cm2 s−1), exceptional rate capability (till 30 A g−1), and extraordinary cycling stability at 0.5, 1.0, and 3.0 A g−1.https://doi.org/10.1002/sstr.202400354lithium‐ion batteriesmetal seleniteN‐doped carbon nanotubesN‐doped graphitic carbonsilicon anodespray pyrolysis |
| spellingShingle | Jae Seob Lee Jung Yeon Kim Hyun Seon Ahn Hye Seon Ka Rakesh Saroha Do Won Jeong Yun Chan Kang Dong‐Won Kang Jung Sang Cho Rational Design Strategy of Multicomponent Si/FeSeOx@N‐Doped Graphitic Carbon Hybrid Microspheres Intertwined with N‐Doped Carbon Nanotubes as Anodes for Ultra‐Stable Lithium‐Ion Batteries Small Structures lithium‐ion batteries metal selenite N‐doped carbon nanotubes N‐doped graphitic carbon silicon anode spray pyrolysis |
| title | Rational Design Strategy of Multicomponent Si/FeSeOx@N‐Doped Graphitic Carbon Hybrid Microspheres Intertwined with N‐Doped Carbon Nanotubes as Anodes for Ultra‐Stable Lithium‐Ion Batteries |
| title_full | Rational Design Strategy of Multicomponent Si/FeSeOx@N‐Doped Graphitic Carbon Hybrid Microspheres Intertwined with N‐Doped Carbon Nanotubes as Anodes for Ultra‐Stable Lithium‐Ion Batteries |
| title_fullStr | Rational Design Strategy of Multicomponent Si/FeSeOx@N‐Doped Graphitic Carbon Hybrid Microspheres Intertwined with N‐Doped Carbon Nanotubes as Anodes for Ultra‐Stable Lithium‐Ion Batteries |
| title_full_unstemmed | Rational Design Strategy of Multicomponent Si/FeSeOx@N‐Doped Graphitic Carbon Hybrid Microspheres Intertwined with N‐Doped Carbon Nanotubes as Anodes for Ultra‐Stable Lithium‐Ion Batteries |
| title_short | Rational Design Strategy of Multicomponent Si/FeSeOx@N‐Doped Graphitic Carbon Hybrid Microspheres Intertwined with N‐Doped Carbon Nanotubes as Anodes for Ultra‐Stable Lithium‐Ion Batteries |
| title_sort | rational design strategy of multicomponent si feseox n doped graphitic carbon hybrid microspheres intertwined with n doped carbon nanotubes as anodes for ultra stable lithium ion batteries |
| topic | lithium‐ion batteries metal selenite N‐doped carbon nanotubes N‐doped graphitic carbon silicon anode spray pyrolysis |
| url | https://doi.org/10.1002/sstr.202400354 |
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