American Chemical Society
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Ionic Layer Epitaxy Growth of Organic/Inorganic Composite Protective Layers for Large-Area Li and Zn Metal Anodes

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journal contribution
posted on 2023-11-17, 14:16 authored by Di Yang, Xiaoyu Wu, Li He, Hainan Zhao, Yizhan Wang, Zeyu Zhang, Jingyi Qiu, Xibang Chen, Yingjin Wei
Li and Zn metal batteries using organic and aqueous electrolytes, respectively, are desirable next-generation energy storage systems to replace the traditional Li-ion batteries. However, their cycle life and safety performance are severely constrained by a series of issues that are attributed to dendrite growth. To solve these issues, a nanothick ZnO–oleic acid (ZnO–OA) composite protective layer is developed by a facile ionic layer epitaxy method. The ZnO–OA layer provides strong lithophilic and zincophilic properties, which can effectively induce uniform ion deposition. As a result, the ZnO–OA protected Li and Zn metal anodes can cycle stably for over 600 and 1000 h under a large current density of 10 mA cm–2. Employing the ZnO–OA protected anodes, the Li||LiFePO4 cell can maintain a capacity retention of 99.5% after 600 cycles at a 1 C rate and the Zn||MnO2 cell can operate stably for 1000 cycles at 1 A g–1 current density.