Abstract
Protecting an anode from deterioration during charging/discharging has been seen as one of the key strategies in achieving high-performance lithium (Li)-O 2 batteries and other Li-metal batteries with a high energy density. Here, we describe a facile approach to prevent the Li anode from dendritic growth and chemical corrosion by constructing a SiO 2/GO hybrid thin layer on the surface. The uniform pore-preserving layer can conduct Li ions in the stripping/plating process, leading to an effective alleviation of the dendritic growth of Li by guiding the ion flux through the microstructure. Such a preservation technique significantly enhances the cell performance by enabling the Li-O 2 cell to cycle up to 348 times at 1 A·g -1 with a capacity of 1000 mA·h·g -1, which is several times the cycles of cells with pristine Li (58 cycles), Li-GO (166 cycles), and Li-SiO 2 (187 cycles). Moreover, the rate performance is improved, and the ultimate capacity of 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-effective fashion.
Original language | English |
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Pages (from-to) | 27316-27326 |
Number of pages | 11 |
Journal | ACS Applied Materials and Interfaces |
Volume | 12 |
Issue number | 24 |
Early online date | 21 May 2020 |
DOIs | |
Publication status | Published - 17 Jun 2020 |
Keywords
- Li−O2 battery
- SiO2/GO coating
- cyclic stability
- lithium metal anode
- protective layer