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LiF as an Artificial SEI Layer to Enhance the High-Temperature Cycle Performance of Li4Ti5O12
Zhang, Lan1; Zhang, Kaihang2; Shi, Zhaohui1; Zhang, Suojiang1
Source PublicationLANGMUIR

Li4Ti6O12 (LTO) is a promising anode Material for electric vehicles (EVs) and electrochemical energy storage applications because of its safety, good rate capability, and long cycle life. At elevated temperature, such as 60 degrees C, it always shows poor cycle performance because of the instability between the electrode material and electrolyte, which may also lead to a serious gassing issue. In this article, a facile hydrothermal method is adopted to coat the LTO powder with a thin LiF layer, in which the LiF acts as an artificial, solid electrolyte interface (SEI) layer to prevent the direct contact of LTO and electrolyte, thus improving the high-temperature cycle performance. Electrochemical tests prove that the LiF coating layer has no influence on the kinetics at ambient temperature and greatly enhances the high-temperature cycle stability, and the LTO@LiF composite material keeps 87% of its initial discharge capacity in 300 1C cycles at 60 degrees C. Moreover, the LiF coating layer exhibits a special self-driven reforming process during the initial cycles, which makes it uniform and more effective at enhancing the stability between electrode/electrolyte interfaces.

WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
Funding OrganizationNational Basic Research (973) Program of China(2014CB239700) ; Key Program of National Natural Science Foundation of China(91434203) ; National Key Research and Development Program of China(2016YFB0100100) ; International Cooperation and Exchange of the National Natural Science Foundation of China(51561145020) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDA09010103) ; Ford-China University Research Program ; CAS/SAFEA International Partnership Program for Creative Research Teams
WOS IDWOS:000413992700009
Citation statistics
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Cornell Univ, Sch Chem & Biomol Engn, Ithaca, NY 14850 USA
Recommended Citation
GB/T 7714
Zhang, Lan,Zhang, Kaihang,Shi, Zhaohui,et al. LiF as an Artificial SEI Layer to Enhance the High-Temperature Cycle Performance of Li4Ti5O12[J]. LANGMUIR,2017,33(42):11164-11169.
APA Zhang, Lan,Zhang, Kaihang,Shi, Zhaohui,&Zhang, Suojiang.(2017).LiF as an Artificial SEI Layer to Enhance the High-Temperature Cycle Performance of Li4Ti5O12.LANGMUIR,33(42),11164-11169.
MLA Zhang, Lan,et al."LiF as an Artificial SEI Layer to Enhance the High-Temperature Cycle Performance of Li4Ti5O12".LANGMUIR 33.42(2017):11164-11169.
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