期刊
NANO LETTERS
卷 14, 期 1, 页码 255-260出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl403874y
关键词
Energy storage; magnesium battery; anode; bismuth nanotube; insertion
类别
资金
- U.S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [KC020105-FWP12152]
- Pacific Northwest National Laboratory (PNNL) Laboratory Directed Research and Development program
- Department of Energy's Office of Biological and Environmental Research
Rechargeable magnesium batteries have attracted wide attention for energy storage. Currently, most studies focus on Mg metal as the anode, but this approach is still limited by the properties of the electrolyte and poor control of the Mg plating/stripping processes. This paper reports the synthesis and application of Bi nanotubes as a high-performance anode material for rechargeable Mg ion batteries. The nanostructured Bi anode delivers a high reversible specific capacity (350 mAh/g(Bi) or 3430 mAh/cm(Bi)(3)), excellent stability, and high Coulombic efficiency (95% initial and very close to 100% afterward). The good performance is attributed to the unique properties of in situ formed, interconnected nanoporous bismuth. Such nanostructures can effectively accommodate the large volume change without losing electric contact and significantly reduce diffusion length for Mg2+. Significantly, the nanostructured Bi anode can be used with conventional electrolytes which will open new opportunities to study Mg ion battery chemistry and further improve its properties.
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