Highly conductive carbon nanotube micro-spherical network for high-rate silicon anode

Byung Hoon Park, Jun Hui Jeong, Geon Woo Lee, Young Hwan Kim, Kwang Chul Roh, Kwang Bum Kim

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We report on a highly conductive CNT micro-spherical network for high-rate silicon anode materials prepared by one-pot spray drying for lithium-ion batteries. The anode material contains silicon nanoparticles bound to CNTs through a small amount of sucrose-derived carbon. The first charge and discharge capacities of the Si/CNT/C microsphere electrode are measured to be 3152 and 2302 mA h g−1 of the composite, respectively, at 0.1 A g−1. The Si/CNT/C microsphere electrode exhibits an initial capacity of 1989 mA h g−1 at current density of 1.0 A g−1 and retains ∼70% of the initial capacity after 100 cycles. Even at a high current density of 10 A g−1, the Si/CNT/C microsphere electrode exhibits a capacity of 784 mA h g−1 with a stable charge/discharge behavior. The superior rate capability of the Si/CNT/C microsphere composites can be attributable to the unhindered Li-ion transport through the highly conductive CNT buffer matrix, to which Si NPs are strongly bound by the sucrose-derived carbon. These salient results give further impetus to the study of CNTs for use as a buffer matrix to improve the rate capability of high-capacity electrode materials with large volume changes during charge storage.

Original languageEnglish
Pages (from-to)94-101
Number of pages8
JournalJournal of Power Sources
Volume394
DOIs
Publication statusPublished - 2018 Aug 1

Fingerprint

Carbon Nanotubes
Silicon
Microspheres
Carbon nanotubes
Anodes
anodes
carbon nanotubes
Electrodes
Sugar (sucrose)
silicon
Sucrose
Buffers
Current density
Carbon
Spray drying
sucrose
Composite materials
electrodes
buffers
Ions

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

Park, Byung Hoon ; Jeong, Jun Hui ; Lee, Geon Woo ; Kim, Young Hwan ; Roh, Kwang Chul ; Kim, Kwang Bum. / Highly conductive carbon nanotube micro-spherical network for high-rate silicon anode. In: Journal of Power Sources. 2018 ; Vol. 394. pp. 94-101.
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Highly conductive carbon nanotube micro-spherical network for high-rate silicon anode. / Park, Byung Hoon; Jeong, Jun Hui; Lee, Geon Woo; Kim, Young Hwan; Roh, Kwang Chul; Kim, Kwang Bum.

In: Journal of Power Sources, Vol. 394, 01.08.2018, p. 94-101.

Research output: Contribution to journalArticle

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