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    New Organic Complex for Lithium Layered Oxide Modification: Ultra-thin Coating, High-Voltage and Safety Performances

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    acsenergylett.9b00032.pdf
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    Type
    Article
    Authors
    Wu, Yingqiang
    Ming, Hai
    Li, Mengliu cc
    Zhang, Junli
    Wahyudi, Wandi
    Xie, Leqiong
    He, Xiangming
    Wang, Jing
    Wu, Yuping
    Ming, Jun cc
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2019-02-08
    Online Publication Date
    2019-02-08
    Print Publication Date
    2019-03-08
    Permanent link to this record
    http://hdl.handle.net/10754/631052
    
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    Abstract
    Surface modification of cathode (e.g., lithium layered oxide, NCM) has become ever more important in lithium-ion batteries, particularly for pursuing higher energy densities and safety at high voltage. This is because structural degradation of cathode can be mitigated significantly. Herein, an organic complex is introduced for metal phosphates (e.g., AlPO4) modification through a new film-forming process in non-aqueous solution. This general strategy overcomes the challenge of non-uniform coating in current precipitation method, then opens a new avenue towards ultra-thin surface modification on molecular scale. As one of examples, as-prepared AlPO4-coated NCM exhibits much improved structural and electrochemical stability; meanwhile, thermal runaway can be suppressed significantly in over-charged cell using the modified NCM, demonstrating higher and reliable safety features. The great improvements benefit from the uniform and ultrathin AlPO4 coating, which inhibits the collapse and conversion of layered structure to spinel especially to rock salt structure at high-voltage conditions, as confirmed by HRTEM and EELS.
    Citation
    Wu Y, Ming H, Li M, Zhang J, Wahyudi W, et al. (2019) New Organic Complex for Lithium Layered Oxide Modification: Ultrathin Coating, High-Voltage, and Safety Performances. ACS Energy Letters: 656–665. Available: http://dx.doi.org/10.1021/acsenergylett.9b00032.
    Sponsors
    The research was supported by the funding of National Materials Genome Project (2016YFB0700600), National Natural Science Foundation Committee of China (Distinguished Youth Scientists Project of 51425301, U1601214, 51573013, 51773092 and 51772147). This work is supported by the National Natural Science Foundation of China (21521092, 21703285 and 11604130) and the Independent Research Project of the State Key Laboratory of Rare Earth Resources Utilization (110005R086), Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. The authors also thank the great support from the King Abdullah University of Science and Technology (KAUST).
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Energy Letters
    DOI
    10.1021/acsenergylett.9b00032
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsenergylett.9b00032
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsenergylett.9b00032
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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