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Shape control of CoO and LiCoO2 nanocrystals

2010; Springer Science+Business Media; Volume: 3; Issue: 1 Linguagem: Inglês

10.1007/s12274-010-1001-9

1998-0124

Dingsheng Wang, Xiaoling Ma, Yang‐Gang Wang, Li Wang, Zhongying Wang, Wen Zheng, Xiangming He, Jun Li, Qing Peng, Yadong Li,

Quantum Dots Synthesis And Properties

Shape control of nanocrystals has become a significant subject in materials science. In this work, we describe a convenient way to achieve morphology-controllable synthesis of CoO nanocrystals including octahedrons and spheres as well as LiCoO2 polyhedrons and spheres. In particular, we explain the formation of CoO octahedrons exposing only high-energy (111) facets using theoretical calculations; these should also be a useful tool for directing future face-controlled preparation of other nanocrystals. More importantly, the as-obtained LiCoO2 nanocrystals showed different electrochemical performance depending on their morphology, indicating that Li-insertion/deintercalation dynamics might be crystal face-sensitive.