Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (9): 1553-1560.DOI: 10.1016/S1872-2067(20)63755-X

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Single crystal metal-organic framework constructed by vertically self-pillared nanosheets and its derivative for oriented lithium plating

Xiaomin Jiaa,, Shaowen Lib,, Tu Sunc,, Yanzhi Wanga,, Yaqi Fanc, Chaochao Zhanga, Yang Xua, Zuozhong Lianga, Haitao Leia, Wei Zhanga, Yuye Zhoud, Yanhang Mac, Haoquan Zhenga,*(), Yue Mab,#(), Rui Caoa,$()   

  1. aKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, Shaanxi, China
    bCenter for Nano Energy Materials, State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
    cSchool of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
    dSchool of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry, Division of Applied Physical Chemistry, Analytical Chemistry, KTH Royal Institute of Technology, SE-106 91, Stockholm, Sweden
  • Received:2020-12-11 Accepted:2021-01-11 Online:2021-09-18 Published:2021-05-16
  • Contact: Haoquan Zheng,Yue Ma,Rui Cao
  • About author:$ E-mail: ruicao@snnu.edu.cn
    # E-mail: mayue04@nwpu.edu.cn;
    * E-mail: zhenghaoquan@snnu.edu.cn;
    First author contact:

    These authors contributed equally to this work.

  • Supported by:
    National Natural Science Foundation of China(21975148);National Natural Science Foundation of China(51602261);National Natural Science Foundation of China(51711530037);National Natural Science Foundation of China(21773146);National Natural Science Foundation of China(21835002);National Natural Science Foundation of China(21875140);National Natural Science Foundation of China(21601118);Fok Ying-Tong Education Foundation for Outstanding Young Teachers in University(21601118);Fundamental Research Funds for the Central Universities(GK201903033);Fundamental Research Funds for the Central Universities(3102019JC005);Shanghai Natural Science Fund(17ZR1418600)

Abstract:

This vertically self-pillared (VSP) structure extends the application range of traditional porous materials with facile mass/ion transport and enhanced reaction kinetics. Here, we prepare a single crystal metal-organic framework (MOF), employing the ZIF-67 structure as a proof of concept, which is constructed by vertically self-pillared nanosheets (VSP-MOF). We further converted VSP-MOF into VSP-cobalt sulfide (VSP-CoS2) through a sulfidation process. Catalysis plays an important role in almost all battery technologies; for metallic batteries, lithium anodes exhibit a high theoretical specific capacity, low density, and low redox potential. However, during the half-cell reaction (Li++e=Li), uncontrolled dendritic Li penetrates the separator and solid electrolyte interphase layer. When employed as a composite scaffold for lithium metal deposition, there are many advantage to using this framework: 1) the VSP-CoS2 substrate provides a high specific surface area to dissipate the ion flux and mass transfer and acts as a pre-catalyst, 2) the catalytic Co center favors the charge transfer process and preferentially binds the Li+ with the enhanced electrical fields, and 3) the VSP structure guides the metallic propagation along the nanosheet 2D orientation without the protrusive dendrites. All these features enable the VSP structure in metallic batteries with encouraging performances.

Key words: Vertically self-pillared structure, Metal organic framework, Pre-catalyst preparation, Lithium plating orientation, Metallic battery