Carbon Surface Layers on a High-Rate LiFePO[sub 4]
- 1 January 2006
- journal article
- Published by The Electrochemical Society in Electrochemical and Solid-State Letters
- Vol. 9 (7), A360-A363
- https://doi.org/10.1149/1.2203309
Abstract
Transmission electron microscopy (TEM) was used to image particles of a high-rate sample containing a small amount of in situ carbon. The particle morphology is highly irregular, with a wide size distribution. Nevertheless, coatings, varying from about 5 to in thickness, could readily be detected on surfaces of particles as well as on edges of agglomerates. Elemental mapping using energy-filtered TEM indicates that these very thin surface layers are composed of carbon. These observations have important implications for the design of high-rate materials in which, ideally, a minimal amount of carbon coating is used.Keywords
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