A Facile Way to Construct Stable and Ionic Conductive Lithium Sulfide Nanoparticles Composed Solid Electrolyte Interphase on Li Metal Anode |
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| Authors: | Yongliang Cui Sufu Liu Donghuang Wang Xiuli Wang Xinhui Xia Changdong Gu Jiangping Tu |
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| Affiliation: | State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China |
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| Abstract: | Due to the high theoretical capacity and low reduction potential, metallic lithium is a promising anode material for the next generation of high-energy-density batteries. However, the dynamic Li plating/stripping process can easily destroy the unstable solid electrolyte interphase (SEI) and cause dendrite growth. Here, an artificial lithium sulfide nanoparticle composed SEI layer with superior stability and high ionic conductivity is designed by a spray quenching method. The artificial SEI layer on Li surface can effectively minimize the side reactions and suppress Li dendrite growth, and the metal electrode delivers stable cycling for 500 cycles in the symmetrical cell with carbonate electrolyte. Moreover, when this SEI-modified Li anode is coupled with a LiFePO4 cathode, the full cell shows promoted cycling stability and rate capability. This work provides a broadly applicable and facile strategy to address the intrinsic issues of lithium metal anodes. |
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| Keywords: | dendrite suppression ionic conductivity Li metal anode lithium sulfide nanoparticle solid electrolyte interphase |
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