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A Facile Surface Preservation Strategy for the Lithium Anode for High-Performance Li-O2 Batteries
作者:Zhihong Luo, Guangbin Zhu, Liankun Yin, Fujie Li, Ben Bin Xu, Laurent Dala, Xiaoteng Liu,* Kun Luo*
關鍵字:lithium metal anode, SiO2/GO coating, protective layer, cyclic stability, Li-O2 battery
論文來源:期刊
具體來源:ACS Appl. Mater. Interfaces 2020, 12, 27316?27326
發表時間:2020年
Protecting an anode from deterioration during charging/discharging has been seen as one of the key strategies in achieving high-performance lithium (Li)-O2 batteries and otherLi metal batteries with a high energy density. Here, we describe afacile approach to prevent the Li anode from dendritic growth andchemical corrosion by constructing a SiO2/GO hybrid thin layeron the surface. The uniform pore-preserving layer can conduct Liions in the stripping/plating process, leading to an effffectivealleviation of the dendritic growth of Li by guiding the ion flfluxthrough the microstructure. Such a preservation techniquesignifificantly enhances the cell performance by enabling the Li-O2 cell to cycle up to 348 times at 1 A·g-1 with a capacity of 1000mA·h·g-1, which is several times the cycles of cells with pristine Li(58 cycles), Li/GO (166 cycles), and Li/SiO2 (187 cycles). Moreover, the rate performance is improved, and the ultimate capacityof the cell is dramatically increased from 5400 to 25,200 mA·h·g-1. This facile technology is robust and conforms to the Li surface,which demonstrates its potential applications in developing future high-performance and long lifespan Li batteries in a cost-effffectivefashion.
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