High capacity disordered carbons obtained from coconut shells as anode materials for lithium batteries

Carbonaceous materials have been obtained by the pyrolysis of coconut shells at 800 and 900 °C with pore forming substances such as KOH and ZnCl 2. The prepared carbons were subjected to XRD, SEM, BET-surface area and charge–discharge studies. The structure and morphology were greatly changed by por...

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Published in:Journal of alloys and compounds 2008-01, Vol.448 (1), p.141-147
Main Authors: Hwang, Yun Ju, Jeong, S.K., Shin, J.S., Nahm, Kee Suk, Stephan, A. Manuel
Format: Article
Language:English
Subjects:
BET-surface area
Chemistry
Cycling stability
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Impedance analysis
Irreversible capacity
Pyrolysis
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description Carbonaceous materials have been obtained by the pyrolysis of coconut shells at 800 and 900 °C with pore forming substances such as KOH and ZnCl 2. The prepared carbons were subjected to XRD, SEM, BET-surface area and charge–discharge studies. The structure and morphology were greatly changed by porogens, which in turn influence the electrochemical properties of the carbonaceous materials. Nanocrystalline tin (Sn) particles were prepared by chemical reduction method. The cycling tests showed that the addition of nanotin with the active material offers a stable cycling behavior. The electrochemical impedance spectra for the Li/C cells have been made and the results are discussed.
doi_str_mv 10.1016/j.jallcom.2006.10.036
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source ScienceDirect Journals
subjects BET-surface area
Chemistry
Cycling stability
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Impedance analysis
Irreversible capacity
Pyrolysis
title High capacity disordered carbons obtained from coconut shells as anode materials for lithium batteries
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