2009
DOI: 10.1021/jp901594g
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Impedance Analysis of Silicon Nanowire Lithium Ion Battery Anodes

Abstract: The impedance behavior of silicon nanowire electrodes has been investigated to understand the electrochemical process kinetics that influences the performance when used as a high-capacity anode in a lithium ion battery. The ac response was measured by using impedance spectroscopy in equilibrium conditions at different lithium compositions and during several cycles of charge and discharge in a half cell vs. metallic lithium. The impedance analysis shows the contribution of both surface resistance and solid stat… Show more

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Cited by 539 publications
(433 citation statements)
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“…46 In Fig. 7d, the impedance spectra also reports the de-lithiation processes on those NCs, where the observed response was probably due to removal of Li + ions through the decomposition of lithiated phases and the SEI surface films, as this was observed as a strong oxidation peak from CV data.…”
Section: Electrochemical Lithiationmentioning
confidence: 74%
“…46 In Fig. 7d, the impedance spectra also reports the de-lithiation processes on those NCs, where the observed response was probably due to removal of Li + ions through the decomposition of lithiated phases and the SEI surface films, as this was observed as a strong oxidation peak from CV data.…”
Section: Electrochemical Lithiationmentioning
confidence: 74%
“…288,300 Recent progress on nanostructured silicon electrode is a good example. [300][301][302][303][304][305][306][307][308] The low cycling stability of bulk silicon has limited the commercial use of silicon in lithium cells, although the theoretical capacity of fully lithiated silicon alloy Li 4.4 Si is 4212 mA h g…”
Section: Selected Recent Progressmentioning
confidence: 99%
“…Capacity fading following structural transformation and increasing impedance may account for such losses [12,25]. Further examples of Si NW electrodes include those grown by reactive ion etching [20] or metal-assisted etching, which displayed both high surface roughness and high conductivity [26], and by a plasma-enhanced CVD method which displayed a high level of interconnection, maintaining good contact with the current collector with ~100% capacity retention at a C/2 rate [27].…”
Section: Siliconmentioning
confidence: 99%