A Highly Reversible, Dendrite‐Free Lithium Metal Anode Enabled by a Lithium‐Fluoride‐Enriched Interphase

Metallic lithium is the most competitive anode material for next‐generation lithium (Li)‐ion batteries. However, one of its major issues is Li dendrite growth and detachment, which not only causes safety issues, but also continuously consumes electrolyte and Li, leading to low coulombic efficiency (...

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Published in:Advanced materials (Weinheim) 2020-03, Vol.32 (12), p.e1906427-n/a
Main Authors: Cui, Chunyu, Yang, Chongyin, Eidson, Nico, Chen, Ji, Han, Fudong, Chen, Long, Luo, Chao, Wang, Peng‐Fei, Fan, Xiulin, Wang, Chunsheng
Format: Article
Language:English
Subjects:
Anodes
Competitive materials
Decay rate
dendrite‐free Li plating
Dendritic structure
Discharge
Electrode materials
Electrolytes
Electrolytic cells
Enrichment
Fluorides
high coulombic efficiency
Interfacial energy
Li metal batteries
LiF‐enriched solid electrolyte interphase
Lithium
Lithium fluoride
Materials science
Nanoparticles
Solid electrolytes
surface fluorinated graphite
Vertical penetration
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cited_by cdi_FETCH-LOGICAL-c4797-dde2c3e3ca51dbf4cb486f1e26b23158d197694bfb1ec82e86c3659d4185d8f13
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creator Cui, Chunyu
Yang, Chongyin
Eidson, Nico
Chen, Ji
Han, Fudong
Chen, Long
Luo, Chao
Wang, Peng‐Fei
Fan, Xiulin
Wang, Chunsheng
description Metallic lithium is the most competitive anode material for next‐generation lithium (Li)‐ion batteries. However, one of its major issues is Li dendrite growth and detachment, which not only causes safety issues, but also continuously consumes electrolyte and Li, leading to low coulombic efficiency (CE) and short cycle life for Li metal batteries. Herein, the Li dendrite growth of metallic lithium anode is suppressed by forming a lithium fluoride (LiF)‐enriched solid electrolyte interphase (SEI) through the lithiation of surface‐fluorinated mesocarbon microbeads (MCMB‐F) anodes. The robust LiF‐enriched SEI with high interfacial energy to Li metal effectively promotes planar growth of Li metal on the Li surface and meanwhile prevents its vertical penetration into the LiF‐enriched SEI from forming Li dendrites. At a discharge capacity of 1.2 mAh cm−2, a high CE of >99.2% for Li plating/stripping in FEC‐based electrolyte is achieved within 25 cycles. Coupling the pre‐lithiated MCMB‐F (Li@MCMB‐F) anode with a commercial LiFePO4 cathode at the positive/negative (P/N) capacity ratio of 1:1, the LiFePO4//Li@MCMB‐F cells can be charged/discharged at a high areal capacity of 2.4 mAh cm−2 for 110 times at a negligible capacity decay of 0.01% per cycle. A dendrite‐free lithium (Li) metal anode for Li metal batteries (LMBs) is realized by using surface‐fluorinated mesocarbon microbeads (MCMB‐F) as substrate. During the lithiation process, the fluorinated graphite on the outermost surface of MCMB‐F is reduced in situ to form a robust lithium‐fluoride‐enriched solid electrolyte interphase, providing an efficient avenue for LMBs with high Li metal coulombic efficiency and no Li dendrite growth.
doi_str_mv 10.1002/adma.201906427
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However, one of its major issues is Li dendrite growth and detachment, which not only causes safety issues, but also continuously consumes electrolyte and Li, leading to low coulombic efficiency (CE) and short cycle life for Li metal batteries. Herein, the Li dendrite growth of metallic lithium anode is suppressed by forming a lithium fluoride (LiF)‐enriched solid electrolyte interphase (SEI) through the lithiation of surface‐fluorinated mesocarbon microbeads (MCMB‐F) anodes. The robust LiF‐enriched SEI with high interfacial energy to Li metal effectively promotes planar growth of Li metal on the Li surface and meanwhile prevents its vertical penetration into the LiF‐enriched SEI from forming Li dendrites. At a discharge capacity of 1.2 mAh cm−2, a high CE of &gt;99.2% for Li plating/stripping in FEC‐based electrolyte is achieved within 25 cycles. Coupling the pre‐lithiated MCMB‐F (Li@MCMB‐F) anode with a commercial LiFePO4 cathode at the positive/negative (P/N) capacity ratio of 1:1, the LiFePO4//Li@MCMB‐F cells can be charged/discharged at a high areal capacity of 2.4 mAh cm−2 for 110 times at a negligible capacity decay of 0.01% per cycle. A dendrite‐free lithium (Li) metal anode for Li metal batteries (LMBs) is realized by using surface‐fluorinated mesocarbon microbeads (MCMB‐F) as substrate. During the lithiation process, the fluorinated graphite on the outermost surface of MCMB‐F is reduced in situ to form a robust lithium‐fluoride‐enriched solid electrolyte interphase, providing an efficient avenue for LMBs with high Li metal coulombic efficiency and no Li dendrite growth.</description><identifier>ISSN: 0935-9648</identifier><identifier>EISSN: 1521-4095</identifier><identifier>DOI: 10.1002/adma.201906427</identifier><identifier>PMID: 32058645</identifier><language>eng</language><publisher>Germany: Wiley Subscription Services, Inc</publisher><subject>Anodes ; Competitive materials ; Decay rate ; dendrite‐free Li plating ; Dendritic structure ; Discharge ; Electrode materials ; Electrolytes ; Electrolytic cells ; Enrichment ; Fluorides ; high coulombic efficiency ; Interfacial energy ; Li metal batteries ; LiF‐enriched solid electrolyte interphase ; Lithium ; Lithium fluoride ; Materials science ; Nanoparticles ; Solid electrolytes ; surface fluorinated graphite ; Vertical penetration</subject><ispartof>Advanced materials (Weinheim), 2020-03, Vol.32 (12), p.e1906427-n/a</ispartof><rights>2020 WILEY‐VCH Verlag GmbH &amp; Co. 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However, one of its major issues is Li dendrite growth and detachment, which not only causes safety issues, but also continuously consumes electrolyte and Li, leading to low coulombic efficiency (CE) and short cycle life for Li metal batteries. Herein, the Li dendrite growth of metallic lithium anode is suppressed by forming a lithium fluoride (LiF)‐enriched solid electrolyte interphase (SEI) through the lithiation of surface‐fluorinated mesocarbon microbeads (MCMB‐F) anodes. The robust LiF‐enriched SEI with high interfacial energy to Li metal effectively promotes planar growth of Li metal on the Li surface and meanwhile prevents its vertical penetration into the LiF‐enriched SEI from forming Li dendrites. At a discharge capacity of 1.2 mAh cm−2, a high CE of &gt;99.2% for Li plating/stripping in FEC‐based electrolyte is achieved within 25 cycles. Coupling the pre‐lithiated MCMB‐F (Li@MCMB‐F) anode with a commercial LiFePO4 cathode at the positive/negative (P/N) capacity ratio of 1:1, the LiFePO4//Li@MCMB‐F cells can be charged/discharged at a high areal capacity of 2.4 mAh cm−2 for 110 times at a negligible capacity decay of 0.01% per cycle. A dendrite‐free lithium (Li) metal anode for Li metal batteries (LMBs) is realized by using surface‐fluorinated mesocarbon microbeads (MCMB‐F) as substrate. During the lithiation process, the fluorinated graphite on the outermost surface of MCMB‐F is reduced in situ to form a robust lithium‐fluoride‐enriched solid electrolyte interphase, providing an efficient avenue for LMBs with high Li metal coulombic efficiency and no Li dendrite growth.</abstract><cop>Germany</cop><pub>Wiley Subscription Services, Inc</pub><pmid>32058645</pmid><doi>10.1002/adma.201906427</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-8626-6381</orcidid><orcidid>https://orcid.org/0000000286266381</orcidid><oa>free_for_read</oa></addata></record>
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source Wiley-Blackwell Journals
subjects Anodes
Competitive materials
Decay rate
dendrite‐free Li plating
Dendritic structure
Discharge
Electrode materials
Electrolytes
Electrolytic cells
Enrichment
Fluorides
high coulombic efficiency
Interfacial energy
Li metal batteries
LiF‐enriched solid electrolyte interphase
Lithium
Lithium fluoride
Materials science
Nanoparticles
Solid electrolytes
surface fluorinated graphite
Vertical penetration
title A Highly Reversible, Dendrite‐Free Lithium Metal Anode Enabled by a Lithium‐Fluoride‐Enriched Interphase
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