In Situ Construction of Stable Tissue‐Directed/Reinforced Bifunctional Separator/Protection Film on Lithium Anode for Lithium–Oxygen Batteries

To achieve a high reversibility and long cycle life for Li–O2 battery system, the stable tissue‐directed/reinforced bifunctional separator/protection film (TBF) is in situ fabricated on the surface of metallic lithium anode. It is shown that a Li–O2 cell composed of the TBF‐modified lithium anodes e...

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Published inAdvanced materials (Weinheim) Vol. 29; no. 24
Main Authors Xu, Ji‐Jing, Liu, Qing‐Chao, Yu, Yue, Wang, Jin, Yan, Jun‐Min, Zhang, Xin‐Bo
Format Journal Article
LanguageEnglish
Published Germany Wiley Subscription Services, Inc 01.06.2017
Subjects
Anode effect
Anodic protection
Batteries
Battery cycles
cycling stability
Energy consumption
Flux density
in situ protection
Lithium
Lithium batteries
lithium metal anodes
lithium–oxygen batteries
Materials science
Metal air batteries
Protective coatings
Surface stability
lithium-oxygen batteries
lithium metal anodes
cycling stability
in situ protection
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Summary:To achieve a high reversibility and long cycle life for Li–O2 battery system, the stable tissue‐directed/reinforced bifunctional separator/protection film (TBF) is in situ fabricated on the surface of metallic lithium anode. It is shown that a Li–O2 cell composed of the TBF‐modified lithium anodes exhibits an excellent anodic reversibility (300 cycles) and effectively improved cathodic long lifetime (106 cycles). The improvement is attributed to the ability of the TBF, which has chemical, electrochemical, and mechanical stability, to effectively prevent direct contact between the surface of the lithium anode and the highly reactive reduced oxygen species (Li2O2 or its intermediate LiO2) in cell. It is believed that the protection strategy describes here can be easily extended to other next‐generation high energy density batteries using metal as anode including Li–S and Na–O2 batteries. A stable tissue‐directed/reinforced bifunctional separator/protection film (TBF) is in situ fabricated on the surface of a metallic lithium anode. The Li–O2 battery cell with the TBF‐modified lithium anodes exhibits an excellent anodic reversibility and effectively improved cathodic long lifetime.
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ISSN:0935-9648
1521-4095
1521-4095
DOI:10.1002/adma.201606552