Dendrite‐Free Lithium Deposition via Flexible‐Rigid Coupling Composite Network for LiNi0.5Mn1.5O4/Li Metal Batteries |
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| Authors: | Jingchao Chai Bingbing Chen Fang Xian Peng Wang Huiping Du Jianjun Zhang Zhihong Liu Huanrui Zhang Shanmu Dong Xinhong Zhou Guanglei Cui |
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| Affiliation: | 1. Qingdao Industrial Energy Storage Technology Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China;2. University of Chinese Academy of Sciences, Beijing, China;3. College of Materials Science and Engineering, Qingdao University of Science & Technology, Qingdao, China;4. College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, China |
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| Abstract: | Notorious lithium dendrite causes severe capacity fade and harsh safety issues of lithium metal batteries, which hinder the practical applications of lithium metal electrodes in higher energy rechargeable batteries. Here, a kind of 3D‐cross‐linked composite network is successfully employed as a flexible‐rigid coupling protective layer on a lithium metal electrode. During the plating/stripping process, the composite protective layer would enable uniform distribution of lithium ions in the adjacent regions of the lithium electrode, resulting in a dendrite‐free deposition at a current density of 2 mA cm?2. The LiNi0.5Mn1.5O4‐based lithium metal battery presents an excellent cycling stability at a voltage range of 3.5–5.0 V with the induction of 3D‐cross‐linked composite protective layer. From an industrial field application of view, thin lithium metal electrodes (40 µm, with 4 times excess lithium) can be used in LiNi0.5Mn1.5O4 (with industrially significant loading of 18 mg cm?2 and 2.6 mAh cm?2)‐based lithium metal batteries, which reveals a promising opportunity for practical applicability in high energy lithium metal batteries. |
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| Keywords: | composite polymer layer high energy density lithium dendrite lithium metal battery poly(vinylene carbonate) |
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