Recently, among various cathode materials for lithium batteries, LiCoO2 has been still use on the market due to electrochemical stability. However, LiCoO2 cathode materials have low thermal stability, high cost, low capacity.... [ view full abstract ]
Recently, among various cathode materials for lithium batteries, LiCoO2 has been still use on the market due to electrochemical stability. However, LiCoO2 cathode materials have low thermal stability, high cost, low capacity. [1-2] Co and Al co-synthesized materials, Li(Ni,Co,Al)O2, are one of the most applicable materials due to the low cost, thermal stability than LiCoO2. Thus, the battery properties of lithium ion cell with LiNi0.85Co0.10Al0.05O2 cathode are better than LiCoO2. But, LiNi0.85Co0.10Al0.05O2 still show that capacity fading. [3] Anodizing method is an effective means of improving electrochemical performance. To improve the electrochemical properties of cathode material LiNi0.85Co0.10Al0.05O2 for a lithium-ion battery, LiNi0.85Co0.10Al0.05O2 cathode powders were prepared by sol-gel method in AAO template followed by heat treatment. The effects of nano-rod samples were more deeply explored through atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS) and differential capacity vs. voltage (dQ/dV) plots. It is found that nano-rod shaped LiNi0.85Co0.10Al0.05O2 (NCA) cathode shows different characteristics in structural change and cycling voltage plateau that was related to changing of binding energy and surface area.
References
[1] T. J. Park, J. B. Lim, and J. T. Son, Bull. Korean Chem. Soc. 2014, Vol. 35, No. 2 357
[2] Z. R. Chang, X.Z. Yuan and H. Wang, Powder Technology 207 (2011) 396–400
[3] H. Kondo, T. Kamiyama and Y. Ukyo, J. Power Sources 174 (2007) 1131–1136
Acknowledgement
This study was supported by the granted financial resource from the Ministry of Trade program of the Industry & Energy, Republic of Korea (G02N03620000901) and the Global Excellent Technology Innovation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
