Cailiao gongcheng (Jun 2020)

Research and application of artificial solid electrolyte interphases for lithium metal anodes protection

  • QI Xin,
  • WANG Chen,
  • NAN Wen-zheng,
  • HONG Qi-hu,
  • PENG Si-kan,
  • YAN Shao-jiu

DOI
https://doi.org/10.11868/j.issn.1001-4381.2019.001209
Journal volume & issue
Vol. 48, no. 6
pp. 50 – 61

Abstract

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Lithium metal has the lowest redox potential (-3.04 V vs standard hydrogen electrode) and extremely high specific capacity (3860 mAh·g-1), making it the ideal anodes materials for lithium secondary batteries. However, during the electrochemical cycling, due to the nonuniform nucleation growth of lithium, lithium dendrites are generated on its surface, and continue to grow and pierce the separator, causing short-circuiting of the batteries and even a fire. In the face of increasing energy density requirements, lithium metal anodes have once again become the focus all over the world. Therefore, it is necessary to protect the lithium metal anodes, suppress negative problems, and exert high performance. The artificial solid electrolyte interphase technology is an effective protection strategy for lithium metal anodes, which is essentially coating the surface of lithium metal with protective layers in advance. The artificial solid electrolyte interphase layers should have good ionic conductivity and electrochemical stability, high barrier property and mechanical strength, which can make the lithium metal anodes have high efficiency, long-term life and dendrites-free properties.The artificial solid electrolyte interphase technology brings hope to lithium metal anodes applications. In this review, the research progress of artificial solid electrolyte interphase strategy for lithium metal anodes protection in recent years was reviewed, the preparation methods, structural characteristics, cycling performances of lithium metal anodes and other aspects were introduced in detail. The specific application and performances of artificial solid electrolyte interphases in lithium secondary batteries were for summarized. Moreover,the current problems were analysed and it was pointed out that for researches of lithium metal anodes, not only the mechanism research need to be strengthed, but also needs to be combined with practical applications.

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