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Interconnected Silicon Hollow Nanospheres for Lithium-Ion Battery Anodes with Long Cycle Life
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Cited 1311 time in Scopus
- Authors
- Issue Date
- 2011-07
- Publisher
- AMER CHEMICAL SOC
- Citation
- NANO LETTERS, Vol.11 No.7, pp.2949-2954
- Abstract
- Silicon is a promising candidate for the anode material in lithium-ion batteries due to its high theoretical specific capacity. However, volume changes during cycling cause pulverization and capacity fade, and improving cycle life is a major research challenge. Here, we report a novel interconnected Si hollow nanosphere electrode that is capable of accommodating large volume changes without pulverization during cycling. We achieved the high initial discharge capacity of 2725 mAh g(-1) with less than 8% capacity degradation every hundred cycles for 700 total cycles. Si hollow sphere electrodes also show a Coulombic efficiency of 99.5% in later cycles. Superior rate capability is demonstrated and attributed to fast lithium diffusion in the interconnected Si hollow structure.
- ISSN
- 1530-6984
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