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New ultra-fast spray-drying method for synthesis of high-capacity lithium vanadium oxide cathode materials

A team at Central South University, Changsha, China, has developed an improved spray-drying method for the synthesis of LiV3O8 (lithium vanadium oxide) that they say is dozens of times faster than the conventional route. LiV3O8 is of interest as a high-capacity, lower-cost electrode material with good safety and high electronic conductivity.

In a paper in the journal Materials Letters, they report that the as-obtained powder was almost pure LiV3O8. The material exhibited as high as 340.2 mAh g−1 discharge capacity in first cycle at current density of 25 mA g−1. After 100 cycles at a current density of 125 mA g−1, the LiV3O8 still maintained a high discharge capacity of 241.8 mAh g−1.

The authors suggested that the new material is promising for application in Li-ion cathodes.

In a 2011 paper in the ACS Journal of Physical Chemistry C, Qiao et al. from Zhejiang University, China, noted that:

For LiV3O8, an extensive amount of study has found that the electrochemical properties of this compound are strongly connected with the preparation method or synthetic condition. Up to now, various methods have been employed to prepare LiV3O8 such as solid-state reactions, low-temperature reaction routes, hydrothermal reactions, sol–gel processes, rheological phase reaction methods, spray-drying syntheses, spray pyrolysis, combustion methods, freeze-drying, ultrasonic methods, RF magnetron sputtering, and so on. The final products are different in many ways such as microstructure, particle size distribution, crystallinity, and phase purity, which have a significant influence on the electrochemical performance.

Resources

  • Xunhui Xiong, Zhixing Wang, Xinhai Li, Huajun Guo (2012) Study on ultrafast synthesis of LiV3O8 cathode material for lithium-ion batteries, Materials Letters, Volume 76, Pages 8-10 doi: 10.1016/j.matlet.2012.02.030

  • Y.Q. Qiao, J.P. Tu, X.L. Wang, J. Zhang, Y.X. Yu, and C.D. Gu (2011) Self-Assembled Synthesis of Hierarchical Waferlike Porous Li–V–O Composites as Cathode Materials for Lithium Ion Batteries. The Journal of Physical Chemistry C 2011 115 (51), 25508-25518 doi: 10.1021/jp2080176

Comments

SJC

This seems like a good method to lower cost of a higher capacity chemistry. We could see some real advances in the next few years that would reduce the price and extend the range of EVs.

HarveyD

Yes...this is one more step towards cheaper improved future batteries.

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