1. A scalable bio-inspired polydopamine-Cu ion interfacial layer for high-performance lithium metal anode
- Author
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Xiaofei Yang, Yaqin Huang, Yu Xiang, Qianqian Meng, Gaoping Cao, Tianzhu Zhou, Li-Zhen Fan, Yuepeng Guan, Huimin Zhang, Hai Ming, Hao Zhang, Meng Li, Yue Liu, Shaobo Huang, Biyan Wang, and Zhang Wenfeng
- Subjects
Materials science ,Nanoparticle ,02 engineering and technology ,Electrolyte ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Stripping (fiber) ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Corrosion ,Anode ,Ion ,Coating ,Chemical engineering ,engineering ,General Materials Science ,Interphase ,Electrical and Electronic Engineering ,0210 nano-technology - Abstract
The growth of Li dendrites and the instability of the solid electrolyte interphase (SEI) layer during plating/stripping has hindered the practical application of high-energy-density batteries based on a lithium metal anode. Building a stable interfacial layer is effective in preventing lithium corrosion by the electrolyte and controlling the deposition of lithium metal. Here, we present a robust polydopamine-Cu ion (PDA-Cu2+) coating layer formed by the aggregation of nanoparticles and Cu ions, which can be obtained by a subtle immersion strategy. We demonstrate that the PDA-Cu2+ protective layer, with a unique structure comprising nanoparticles, can regulate and guide Li metal deposition, and together with Cu ions, forms a lubricating surface to facilitate uniform Li ion diffusion and induce stable SEI layer formation. Li anodes with this PDA-Cu2+ layer modification ultimately achieve higher Coulombic efficiencies, which are consistently stable for over 650 cycles at 0.5 mA·cm−2 without Li dendrites. The introduced PDA-Cu2+ coating can adhere to any material of any shape; additionally, the operation can be realized on a large scale because of its simplicity. These merits provide a promising approach for developing stable and safe lithium metal batteries.
- Published
- 2019