期刊
NANOSCALE
卷 7, 期 1, 页码 282-288出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr04903a
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资金
- International Research Training Group (IRTG) project [49004401]
- Natural Science Foundation of Jiangsu Province of China [BK20140315]
- National Natural Science Foundation of China [51402202]
Amorphous SnO2 nanomembranes as anodes for lithium ion batteries demonstrate a long cycling life of 1000 cycles at 1600 mA g(-1) with a high reversible capacity of 854 mA h g(-1) and high rate capability up to 40 A g(-1). The superior performance is because of the structural features of the amorphous SnO2 nanomembranes. The nanoscale thickness provides considerably reduced diffusion paths for Li+. The amorphous structure can accommodate the strain of lithiation/delithiation, especially during the initial lithiation. More importantly, the mechanical feature of deformation can buffer the strain of repeated lithiation/delithiation, thus putting off pulverization. In addition, the two-dimensional transport pathways in between nanomembranes make the pseudo-capacitance more prominent. The encouraging results demonstrate the significant potential of nanomembranes for high power batteries.
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