Rattle-type porous Sn/C composite fibers with uniformly distributed nanovoids containing metallic Sn nanoparticles for high-performance anode materials in lithium-ion batteries
- Authors
- Lee, Ju Ho; Oh, Se Hwan; Jeong, Sun Young; Kang, Yun Chan; Cho, Jung Sang
- Issue Date
- 7-12월-2018
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.10, no.45, pp.21483 - 21491
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 10
- Number
- 45
- Start Page
- 21483
- End Page
- 21491
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/71222
- DOI
- 10.1039/c8nr06075d
- ISSN
- 2040-3364
- Abstract
- Rattle-type porous Sn/carbon (Sn/C) composite fibers with uniformly distributed nanovoids containing metallic Sn nanoparticles in void space surrounded by C walls (denoted as RT-Sn@C porous fiber) were prepared by electrospinning and subsequent facile heat-treatment. Highly concentrated polystyrene nanobeads used as a sacrificial template played a key role in the synthesis of the unique structured RT-Sn@C porous fiber. The RT-Sn@C porous fiber exhibited excellent long-term cycling and rate performances. The discharge capacity of the RT-Sn@C porous fiber at the 1000(th) cycle was 675 mA h g(-1) at a high current density of 3.0 A g(-1). The RT-Sn@C porous fiber had final discharge capacities of 991, 924, 890, 848, 784, 717, 679, and 614 mA h g(-1) at current densities of 0.1, 0.2, 0.3, 0.5, 1.0, 2.0, 3.0, 5.0, and 10.0 A g(-1), respectively. The numerous void spaces, surrounding a Sn nanoparticle as the rattle-type particle, and the surrounding C could efficiently accommodate the volume changes of the Sn nanoparticles, improve the electrical conductivity, and enable efficient penetration of the liquid electrolyte into the structure.
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