Si Nanocrystal-Embedded SiOx nanofoils: Two-Dimensional Nanotechnology-Enabled High Performance Li Storage Materials
- Title
- Si Nanocrystal-Embedded SiOx nanofoils: Two-Dimensional Nanotechnology-Enabled High Performance Li Storage Materials
- Author
- 김한수
- Keywords
- THIN-FILM ANODE; HIGH-CAPACITY; AMORPHOUS-SILICON; NATURAL GRAPHITE; ION BATTERIES; LITHIUM; NANOSHEETS; LITHIATION; ELECTRODE
- Issue Date
- 2018-05
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- SCIENTIFIC REPORTS, v. 8, Article no. 6904
- Abstract
- Silicon (Si) based materials are highly desirable to replace currently used graphite anode for lithium ion batteries. Nevertheless, its usage is still a big challenge due to poor battery performance and scale-up issue. In addition, two-dimensional (2D) architectures, which remain unresolved so far, would give them more interesting and unexpected properties. Herein, we report a facile, cost-effective, and scalable approach to synthesize Si nanocrystals embedded 2D SiOx nanofoils for next-generation lithium ion batteries through a solution-evaporation-induced interfacial sol-gel reaction of hydrogen silsesquioxane (HSiO1.5, HSQ). The unique nature of the thus-prepared centimeter scale 2D nanofoil with a large surface area enables ultrafast Li+ insertion and extraction, with a reversible capacity of more than 650 mAh g(-1), even at a high current density of 50 C (50 A g(-1)). Moreover, the 2D nanostructured Si/SiOx nanofoils show excellent cycling performance up to 200 cycles and maintain their initial dimensional stability. This superior performance stems from the peculiar nanoarchitecture of 2D Si/SiOx nanofoils, which provides short diffusion paths for lithium ions and abundant free space to effectively accommodate the huge volume changes of Si during cycling.
- URI
- https://www.nature.com/articles/s41598-018-25159-4https://repository.hanyang.ac.kr/handle/20.500.11754/118724
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-018-25159-4
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
- Files in This Item:
- Si Nanocrystal-Embedded SiOx nanofoils Two-Dimensional Nanotechnology-Enabled High Performance Li Storage Materials.pdfDownload
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