Semimicro-size agglomerate structured silicon-carbon composite as an anode material for high performance lithium-ion batteries
- Title
- Semimicro-size agglomerate structured silicon-carbon composite as an anode material for high performance lithium-ion batteries
- Author
- 정윤석
- Keywords
- Semimicro-size silicon-carbon composite; Agglomerate structure; Aerosol process; Lithium-ion battery anode
- Issue Date
- 2016-10
- Publisher
- ELSEVIER SCIENCE BV
- Citation
- JOURNAL OF POWER SOURCES, v. 334, page. 128-136
- Abstract
- A semimicro-size agglomerate structured silicon-carbon (mSi-C) composite is constructed by an aggregation of silicon nanoparticles (similar to 100 nm) coated with conductive carbon layer through a facile and scalable aerosol-assisted process to be employed as an anode material for lithium-ion batteries (LIBs). As formed mSi-C composite delivers good electrochemical performances of high reversible capacity (2084 mAh/g) between 0.01 and 1.50 V (vs. Li/Li+) at 0.4 A/g, 96% capacity retention (1999 mAh/g) after 50 cycles and good rate capability (906 mAh/g) at 12 A/g. Such good performances can be attributed to 1) unique composite structure which accommodates the stress induced by volume change of silicon during lithiation/delithiation and facilitates ion transport, and 2) conformally formed carbon layer which enhances conductivity of the composite and helps to form a stable SEI layer. In addition, a high tap density (0.448 g/cm(3)) of mSi-C composite leads to high volumetric capacity (933 mAh/cm(3)), allowing its practical applications as an anode material towards high performance LIBs. (C) 2016 Published by Elsevier B.V.
- URI
- https://www.sciencedirect.com/science/article/pii/S0378775316312666?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/98906
- ISSN
- 0378-7753; 1873-2755
- DOI
- 10.1016/j.jpowsour.2016.09.096
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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