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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 μm). 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 ℃) and a current rate of 2 C (500 mA·g–1) showed no significant capacity fade.

Publication history
Copyright
Acknowledgements

Publication history

Received: 28 August 2013
Revised: 14 October 2013
Accepted: 15 October 2013
Published: 14 November 2013
Issue date: January 2014

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2013

Acknowledgements

Acknowledgements

The authors kindly acknowledge the financial support of the Federal Ministry of Education and Research (BMBF), the Federal Ministry of Economic and Technology (BMWi) and the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU) of Germany within the project KaLiPat.

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