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DC Field | Value | Language |
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dc.citation.endPage | 192 | - |
dc.citation.number | 3 | - |
dc.citation.startPage | 187 | - |
dc.citation.title | NATURE NANOTECHNOLOGY | - |
dc.citation.volume | 9 | - |
dc.contributor.author | Liu, Nian | - |
dc.contributor.author | Lu, Zhenda | - |
dc.contributor.author | Zhao, Jie | - |
dc.contributor.author | McDowell, Matthew T. | - |
dc.contributor.author | Lee, Hyun-Wook | - |
dc.contributor.author | Zhao, Wenting | - |
dc.contributor.author | Cui, Yi | - |
dc.date.accessioned | 2023-12-22T02:46:20Z | - |
dc.date.available | 2023-12-22T02:46:20Z | - |
dc.date.created | 2016-01-22 | - |
dc.date.issued | 2014-03 | - |
dc.description.abstract | Silicon is an attractive material for anodes in energy storage devices(1-3), because it has ten times the theoretical capacity of its state-of-the-art carbonaceous counterpart. Silicon anodes can be used both in traditional lithium-ion batteries and in more recent Li-O-2 and Li-S batteries as a replacement for the dendrite-forming lithium metal anodes. The main challenges associated with silicon anodes are structural degradation and instability of the solid-electrolyte interphase caused by the large volume change (similar to 300%) during cycling, the occurrence of side reactions with the electrolyte, and the low volumetric capacity when the material size is reduced to a nanometre scale(4-7). Here, we propose a hierarchical structured silicon anode that tackles all three of these problems. Our design is inspired by the structure of a pomegranate, where single silicon nanoparticles are encapsulated by a conductive carbon layer that leaves enough room for expansion and contraction following lithiation and delithiation. An ensemble of these hybrid nanoparticles is then encapsulated by a thicker carbon layer in micrometre-size pouches to act as an electrolyte barrier. As a result of this hierarchical arrangement, the solid-electrolyte interphase remains stable and spatially confined, resulting in superior cyclability (97% capacity retention after 1,000 cycles). In addition, the microstructures lower the electrode-electrolyte contact area, resulting in high Coulombic efficiency (99.87%) and volumetric capacity (1,270 mAh cm(-3)), and the cycling remains stable even when the areal capacity is increased to the level of commercial lithium-ion batteries (3.7 mAh cm(-2)). | - |
dc.identifier.bibliographicCitation | NATURE NANOTECHNOLOGY, v.9, no.3, pp.187 - 192 | - |
dc.identifier.doi | 10.1038/NNANO.2014.6 | - |
dc.identifier.issn | 1748-3387 | - |
dc.identifier.scopusid | 2-s2.0-84895920205 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/18251 | - |
dc.identifier.url | http://www.nature.com/nnano/journal/v9/n3/full/nnano.2014.6.html | - |
dc.identifier.wosid | 000332637200011 | - |
dc.language | 영어 | - |
dc.publisher | NATURE PUBLISHING GROUP | - |
dc.title | A pomegranate-inspired nanoscale design for large-volume-change lithium battery anodes | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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