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Author

Lee, Sang-Young
Energy Soft-Materials Lab (ESML)
Research Interests
  • Soft Materials for Energy Storage/ Conversion Systems

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Effect of MWCNT on the performances of the rounded shape natural graphite as anode material for lithium-ion batteries

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Title
Effect of MWCNT on the performances of the rounded shape natural graphite as anode material for lithium-ion batteries
Author
Lee, Sang-YoungPark, Jong HyeokPark, PilkyuKim, Jong HunAhn, SoonhoLee, Kyeong-JikLee, Hyung-DongPark, Jae-SungKim, Deok-HyeongJeong, Yeon Uk
Keywords
Anode material; Composite anodes; Cyclability; Dispersion process; Electrical contacts; Functional additives; Intercalation/deintercalation; Large strains; Lithium-ion battery; Natural graphite; Uniform dispersions; Well-dispersed
Issue Date
201006
Publisher
SPRINGER
Citation
JOURNAL OF SOLID STATE ELECTROCHEMISTRY, v.14, no.6, pp.951 - 956
Abstract
Multi-walled carbon nanotube (MWCNT) with bundle-type morphology was introduced as a new functional additive working as a particle connector or an expansion absorber in the anodes of lithium-ion batteries. By controlling the dispersion process, the MWCNT bundles were successfully divided and dispersed between the host particles. The composite anode consisting of rounded shape natural graphite and 2 wt.% of MWCNT exhibited the capacity of 300 mAh g -1 at 3 C rate and excellent cyclability. The well-dispersed MWCNT bundles made it possible to relieve the large strains developed at high discharge C rates and to keep the electrical contact between the host particles during repeated intercalation/deintercalation. This study has also emphasized that when high C-rate applications of lithium-ion batteries are targeted, it is important to get optimum content of MWCNT as well as uniform dispersion of their bundles in the composite anodes.
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DOI
http://dx.doi.org/10.1007/s10008-009-0888-0
ISSN
1432-8488
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