Electrochemical characteristics of phosphorus doped Si-C composite for anode active material of lithium secondary batteries
- Authors
- Noh, Jae-Hyun; Lee, Kwan-Young; Lee, Joong-Kee
- Issue Date
- 8월-2009
- Publisher
- ELSEVIER
- Keywords
- secondary batteries; anode; silicon-carbon composite; phosphor-us doping; arc plasma pyrolysis
- Citation
- TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, v.19, no.4, pp.1018 - 1022
- Indexed
- SCIE
SCOPUS
- Journal Title
- TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
- Volume
- 19
- Number
- 4
- Start Page
- 1018
- End Page
- 1022
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/119619
- DOI
- 10.1016/S1003-6326(08)60399-4
- ISSN
- 1003-6326
- Abstract
- Phosphorus doped silicon-carbon composite particles were synthesized through a DC arc plasma torch. Silane(SiH4) and methane(CH4) were introduced into the reaction chamber as the precursor of silicon and carbon, respectively. Phosphine(PH3) was used as a phosphorus dopant gas. Characterization of synthesized particles were carried out by scanning electron microscopy(SEM), X-ray diffractometry(XRD), X-ray photoelectron spectroscopy(XPS) and bulk resistivity measurement. Electrochemical properties were investigated by cyclic test and electrochemical voltage spectroscopy(EVS). In the experimental range, phosphorus doped silicon-carbon composite electrode exhibits enhanced cycle performance than intrinsic silicon and phosphorus doped silicon. It can be explained that incorporation of carbon into silicon acts as a buffer matrix and phosphorus doping plays an important role to enhance the conductivity of the electrode, which leads to the improvement of the cycle performance of the cell.
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Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
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