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Dual Carbon Layers Hybridized Mesoporous Tin Hollow Spheres for Fast-rechargeable and High-stable Lithium-ion Battery Anode

Abstract

Although tin-based nanocomposites are potential fast-charging anode materials in lithium-ion batteries to replace graphite-based materials due to the high theoretical capacity, there are some practical limitations such as the relatively poor cycle stability caused by the large volume change and aggregation of Sn. Herein, we report a conjoint Sn/C hollow spherical nanocomposite (MSHSs@C/C) prepared by twice DA polymerization and annealing. The MSHSs@C/C with ultrasmall Sn nanoparticles (5-8 nm) embedded in the conductive carbon matrix can achieve a large Sn mass loading of 75 % and overcome aggregation and volumetric expansion of Sn during cycling. The MSHSs@C/C anode delivers excellent performance including a high reversible capacity of 831 mA h g-1 at a current density of 0.1 A g-1, a capacity retention of 42.5% when the density is increased 100 times from 0.1 to 10 A g-1, a capacity of 325 mA h gāˆ’1 at a large current density of 10.0 A gāˆ’1 (10 C, 1 C = 1.0 A g-1) after 4,000 cycles, and superior cycling stability. Fast charging can be accomplished in 2.5 min and the MSHSs@C/C anode overcomes many of the intrinsic problems plaguing Sn-based anode materials in Li-ion batteries.

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Publication details

The article was received on 15 Feb 2017, accepted on 13 Jun 2017 and first published on 13 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA01399J
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Dual Carbon Layers Hybridized Mesoporous Tin Hollow Spheres for Fast-rechargeable and High-stable Lithium-ion Battery Anode

    W. An, J. Fu, S. Mei, L. Xia, H. Gu, X. Zhang, B. Gao, X. Li, P. K. Chu and K. Huo, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA01399J

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