Lithium metal protection through in-situ formed solid electrolyte interphase in lithium-sulfur batteries: The role of polysulfides on lithium anode
作者： Chong Yan , Xin-Bing Cheng , Chen-Zi Zhao , Jia-Qi Huang , Shu-Ting Yang
DOI: 10.1016/J.JPOWSOUR.2016.07.056
关键词:
摘要: Abstract The dissolution and diffusion of Li polysulfide (LiPS) intermediates are regarded as one the most serious problems for capacity decay cell failure lithium-sulfur (Li-S) batteries. Herein we proposed a mechanism metal anode in Li-S cells based on mechanistic investigation into complex interactions between LiPSs metal. participate formation inorganic layers solid electrolyte interphase (SEI) LiPS-LiNO3 containing ether-based electrolyte. is well protected by stable layer in-situ formed an 0.020 M Li2S5 (0.10 M sulfur) 5.0 wt % LiNO3. with LiF-Li2Sx riched SEI rendered Coulombic efficiency 95% after 233 cycles Li-Cu half cells. A dendrite-free morphology observed under harsh condition. When LiPS very high concentration higher than 0.50 M sulfur organic electrolyte, cannot maintain gradually etched. Therefore, should be delicately regulated to render practical when areal loading high.
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