通过短路通电在现场构建锌导电界面层以实现稳定的锌负极。
On-site building of a Zn-conductive interfacial layer via short-circuit energization for stable Zn anode.
作者信息
Xiao Ping, Xue Lanlan, Guo Yanpeng, Hu Lintong, Cui Can, Li Huiqiao, Zhai Tianyou
机构信息
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China.
出版信息
Sci Bull (Beijing). 2021 Mar 30;66(6):545-552. doi: 10.1016/j.scib.2020.10.017. Epub 2020 Oct 29.
Aqueous zinc ion batteries (ZIBs) show great potential in large-scale energy storage systems for their advantages of high safety, low cost, high capacity, and environmental friendliness. However, the poor performance of Zn metal anode seriously hinders the application of ZIBs. Herein, we use the zinc-ion intercalatable VO·nHO (VO) as the interface modification material, for the first time, to on-site build a Zn-conductive ZnVO·nHO (ZnVO) interfacial layer via the spontaneous short-circuit reaction between the pre-fabricated VO film and Zn metal foil. Compared with the bare Zn, the ZnVO-coated Zn anode exhibits better electrochemical performances with dendrite-free Zn deposits, lower polarization, higher coulombic efficiency over 99% after long cycles and 10 times higher cycle life, which is confirmed by constructing Zn symmetrical cell and Zn|ZnSO + LiSO|LiFePO full cell.
水系锌离子电池（ZIBs）因其具有高安全性、低成本、高容量和环境友好等优点，在大规模储能系统中显示出巨大潜力。然而，锌金属负极的性能不佳严重阻碍了水系锌离子电池的应用。在此，我们首次使用可嵌入锌离子的VO·nHO（VO）作为界面改性材料，通过预制的VO薄膜与锌金属箔之间的自发短路反应，原位构建了一个锌导电的ZnVO·nHO（ZnVO）界面层。与裸锌相比，涂覆ZnVO的锌负极表现出更好的电化学性能，锌沉积无枝晶、极化更低、长循环后库仑效率高于99%且循环寿命提高了10倍，这通过构建锌对称电池和Zn|ZnSO + LiSO|LiFePO全电池得到了证实。
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