Abstract
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The elemental distribution of as-received (non-charged) and charged Li-ion battery positive electrodes containing LixNi0.8Co0.15Al0.05O2 (0.75 ? x ? 1.0) microparticles as active material is characterized by combining ?-PIXE and ?-PIGE techniques. PIGE measurements evidence that the Li distribution is inhomogeneous (existence of Li-rich and Li-depleted regions) in as-received electrodes corresponding with the distribution of secondary particles but it is homogeneous within the studied individual secondary micro-particles. The dependence of the Li distribution on electrode thickness and on charging conditions is characterized by measuring the Li distribution maps in specifically fabricated cross-sectional samples. These data show that decreasing the electrode thickness down to 35 ?m and charging the batteries at slow rate give rise to more homogeneous Li depth profiles | |
International
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Si |
JCR
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Si |
Title
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Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
ISBN
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0168-583x |
Impact factor JCR
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Impact info
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Volume
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290 |
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Journal number
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From page
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79 |
To page
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84 |
Month
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SIN MES |
Ranking
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