Electrochemical Dilatometry Study on Si-Embedded Carbon Nanotube Powder Electrodes | Zendy

Sang-Jin Park | Zendy; Taeahn Kim | Zendy; Seung M. Oh | Zendy

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Electrochemical Dilatometry Study on Si-Embedded Carbon Nanotube Powder Electrodes

Author(s) -

Sang-Jin Park,

Taeahn Kim,

Seung M. Oh

Publication year - 2007

Publication title -

electrochemical and solid-state letters

Language(s) - English

Resource type - Journals

eISSN - 1944-8775

pISSN - 1099-0062

DOI - 10.1149/1.2717365

Subject(s) - materials science , carbon nanotube , void (composites) , electrode , electrochemistry , carbonization , composite material , vinyl chloride , dispersion (optics) , chemical engineering , nanotube , scanning electron microscope , copolymer , chemistry , physics , engineering , polymer , optics

Si-embedded carbon nanotube (Si-C/NT) powders were prepared by dispersing carbon nanotubes (CNTs) and Si in the tetrahydrofuran solution containing poly(vinyl chloride) (PVC) as a dispersion agent, and then carbonizing the PVC. A better cycle performance was observed with the Si-C/NT containing larger void volume. The origin of this feature was addressed by an electrochemical dilatometry study, where it was found that the electrode swelling becomes less significant when the Si-C/NT possesses a larger void space. It is believed that the void space plays a buffering role against the volume expansion of Si, alleviating the breakdown of electrode integrity.

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