Functional surface modifications on nanostructured LiCoO2 with lithium vanadates
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Novel surface modifications with lithium vanadate (Li 3VO 4) were performed on LiCoO 2 nanoparticles that were synthesized by a hydrothermal method. Facile wet coatings followed by high-temperature treatments were utilized to create the lithium vanadate layers. Reaction mechanisms between the surface modifier and LiCoO 2 nanoparticles were also systematically investigated. Upon thermal annealing, lithium vanadates often captured Li from LiCoO 2. It was found that it is crucial to add extra LiOH not to deteriorate LiCoO 2 during the high-temperature treatments. For small weight percentage coatings (5.5 wt%), thin layers of Li 3VO 4 were found on the surface of LiCoO 2; while for high weight percentage coatings (53.1 wt%), thick Li 3VO 4 shells as well as separate nanostructures were observed. © 2012 Springer Science+Business Media B.V.
author list (cited authors)
Pu, X., Yin, L., & Yu, C.