Journal
NANO RESEARCH
Volume 7, Issue 1, Pages 110-118Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-013-0378-7
Keywords
Li-rich cathode; nano hollow sphere; molten salt synthesis; electrochemical performance; lithium ion batteries
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Funding
- Federal Ministry of Education and Research (BMBF)
- Federal Ministry of Economic and Technology (BMWi)
- Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU) of Germany within the project KaLiPat
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A high voltage layered Li1.2Ni0.16Co0.08Mn0.56O2 cathode material with a hollow spherical structure has been synthesized by molten-salt method in a NaCl flux. Characterization by X-ray diffraction and scanning electron microscopy confirmed its structure and proved that the as-prepared powder is constituted of small, homogenously sized hollow spheres (1-1.5 mu m). The material exhibited enhanced rate capability and high first cycle efficiency due to the good dispersion of secondary particles. Galvanostatic cycling at different temperatures (20, 40, and 60 A degrees C) and a current rate of 2 C (500 mA center dot g(-1)) showed no significant capacity fade.
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