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Improved Performance in FeF2 Conversion Cathodes through Use of a Conductive 3D Scaffold and Al2O3 ALD Coating
Kim, Sanghyeon1; Liu, Jinyun1,2; Sun, Ke3,4; Wang, Junjie1; Dillon, Shen J.3; Braun, Paul V.1
2017-09-20
Source PublicationADVANCED FUNCTIONAL MATERIALS
Volume27Issue:35
AbstractFeF2 is considered a promising conversion compound for the positive electrode in lithium-ion batteries due to its high thermodynamic reduction potential (2.66 V vs Li/Li+) and high theoretical specific capacity (571 mA h g(-1)). However, the sluggish reaction kinetics and rapid capacity decay caused by side reactions during cycling limit its practical application. Here, the fabrication of Ni-supported 3D Al2O3-coated FeF2 electrodes is presented, and it is shown that these structured electrodes significantly overcome these limitations. The electrodes are prepared by iron electrodeposition on a Ni support, followed by a facile fluorination process and Al2O3 coating by atomic layer deposition. The 3D FeF2 electrode delivers an initial discharge capacity of 380 mA h g(-1) at a current density of 200 mA g(-1) at room temperature. The 3D scaffold improves the reaction kinetics and enables a high specific capacity by providing an efficient electron pathway to the insulating FeF2 and short Li diffusion lengths. The Al2O3 coating significantly improves the cycle life, probably by preventing side reactions through limiting direct electrode-electrolyte contact. The fabrication method presented here can also be applied for synthesis of other metal fluoride materials on different 3D conductive templates.
SubtypeArticle
KeywordAtomic Layer Deposition Bicontinuous Cathodes Fluorination Li-ion Batteries Metal Fluorides
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Funding OrganizationU.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign(DE-FG02-07ER46471) ; U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign(DE-FG02-07ER46471) ; Kwanjeong Educational Foundation ; Kwanjeong Educational Foundation ; U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign(DE-FG02-07ER46471) ; U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign(DE-FG02-07ER46471) ; Kwanjeong Educational Foundation ; Kwanjeong Educational Foundation
DOI10.1002/adfm.201702783
WOS KeywordLITHIUM-ION BATTERIES ; METAL FLUORIDE NANOCOMPOSITES ; ATOMIC LAYER DEPOSITION ; IRON FLUORIDE ; ELECTRODE MATERIALS ; ANODE MATERIAL ; THIN-FILMS ; COMPOSITE ; FABRICATION ; CHALLENGES
Indexed BySCI
Language英语
Funding OrganizationU.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign(DE-FG02-07ER46471) ; U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign(DE-FG02-07ER46471) ; Kwanjeong Educational Foundation ; Kwanjeong Educational Foundation ; U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign(DE-FG02-07ER46471) ; U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign(DE-FG02-07ER46471) ; Kwanjeong Educational Foundation ; Kwanjeong Educational Foundation
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000411027300014
Citation statistics
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/33675
Collection中科院合肥智能机械研究所
Affiliation1.Univ Illinois, Beckman Inst, Dept Mat Sci & Engn, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA
2.Chinese Acad Sci, Inst Intelligent Machines, Hefei 230031, Anhui, Peoples R China
3.Univ Illinois, Frederick Seitz Mat Res Lab, Dept Mat Sci & Engn, Urbana, IL 61801 USA
4.Brookhaven Natl Lab, 2 Ctr St, Upton, NY 11973 USA
Recommended Citation
GB/T 7714
Kim, Sanghyeon,Liu, Jinyun,Sun, Ke,et al. Improved Performance in FeF2 Conversion Cathodes through Use of a Conductive 3D Scaffold and Al2O3 ALD Coating[J]. ADVANCED FUNCTIONAL MATERIALS,2017,27(35).
APA Kim, Sanghyeon,Liu, Jinyun,Sun, Ke,Wang, Junjie,Dillon, Shen J.,&Braun, Paul V..(2017).Improved Performance in FeF2 Conversion Cathodes through Use of a Conductive 3D Scaffold and Al2O3 ALD Coating.ADVANCED FUNCTIONAL MATERIALS,27(35).
MLA Kim, Sanghyeon,et al."Improved Performance in FeF2 Conversion Cathodes through Use of a Conductive 3D Scaffold and Al2O3 ALD Coating".ADVANCED FUNCTIONAL MATERIALS 27.35(2017).
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