Matter ( IF 17.3 ) Pub Date : 2019-09-11 , DOI: 10.1016/j.matt.2019.06.020
Yang Zhao , Maedeh Amirmaleki , Qian Sun , Changtai Zhao , Anastasia Codirenzi , Lyudmila V. Goncharova , Changhong Wang , Keegan Adair , Xia Li , Xiaofei Yang , Feipeng Zhao , Ruying Li , Tobin Filleter , Mei Cai , Xueliang Sun
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The solid electrolyte interphase (SEI) layer is one of the key factors for Li metal anode affecting the Li-deposition behavior and electrochemical performances. However, the fabrication of artificial SEI layers with precisely controlled composition, thickness, and mechanical properties is still challenging and difficult to be realized. In this study, we demonstrate an SEI-inspired dual protective layer for Li metal anode with highly controllable structures and robust mechanical properties (the organic alucone as the outer layer and inorganic Al2O3 as the inner layer), which is deposited by atomic layer deposition (ALD) and molecular layer deposition (MLD) techniques. The dual-layer protected Li anode displays significantly enhanced electrochemical performances, suppressed mossy/dead Li formation, and robust properties during the plating/stripping process. It is believed that our design of dual-layer protected Li metal anode by ALD and MLD opens up new opportunities for the realization of next-generation high-energy-density Li metal batteries.
中文翻译:
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通过长寿命金属锂阳极原子/分子层沉积获得的自然SEI启发的双重保护层
固体电解质中间相(SEI)层是锂金属阳极影响锂沉积行为和电化学性能的关键因素之一。然而,具有精确控制的组成,厚度和机械性能的人造SEI层的制造仍然具有挑战性并且难以实现。在这项研究中,我们展示了一种SEI启发的锂金属阳极双重保护层,该层具有高度可控的结构和强大的机械性能(有机阿魏酮作为外层,无机Al 2 O 3作为内层),通过原子层沉积(ALD)和分子层沉积(MLD)技术进行沉积。双层保护的Li阳极在电镀/剥离过程中显示出显着增强的电化学性能,抑制了生苔/死Li的形成以及坚固的性能。相信我们通过ALD和MLD设计的双层保护锂金属阳极为实现下一代高能量密度锂金属电池打开了新的机遇。