Synthetic optimization of spherical LiCoO2 and precursor via uniform-phase precipitation

Ping He, Haoran Wang, Lu Qi*, Tetsuya Osaka

*この研究の対応する著者

研究成果: Article査読

27 被引用数 (Scopus)

抄録

LiCoO2 had been successfully prepared from spherical basic cobalt carbonate via a simple uniform-phase precipitation method at normal pressure, using cobalt sulfate and urea as the reactants. The preparation of spherical basic cobalt carbonate was significantly dependant on synthetic condition, such as the reactant concentration, reaction temperature and impeller speed, etc. The optimized condition resulted in spherical basic cobalt carbonate with uniform particle size distribution, as observed by scanning electron microscopy. Calcination of the uniform basic cobalt carbonate with lithium carbonate at high temperature led to a well-ordered layer-structured LiCoO2 without shape change, as confirmed by X-ray diffraction. Due to the homogeneity of the basic cobalt carbonate, the final product, LiCoO2, was also significantly uniform, i.e., the average particle size was of about 10 μm in diameter and the distribution was relatively narrow. As a result, the corresponding tap-density was also high approximately 2.60 g cm-3, of which the value is higher than that of commercialized LiCoO2 of Hunan Ruixing, co. In the voltage range 2.8-4.2, 2.8-4.3, and 2.8-4.4 V, the discharge capacities of LiCoO2 electrode were 153, 159, and 168 mAh g-1, respectively, with better cyclability.

本文言語English
ページ(範囲)529-534
ページ数6
ジャーナルJournal of Power Sources
158
1
DOI
出版ステータスPublished - 2006 7月 14

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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