Preparation of spherical and dense LiNi0.8Co0.2O2 lithium-ion battery particles by spray pyrolysis

• Published in: Journal of Central South University of Technology. Science & technology of mining and metallurgy Vol. 15; no. 1; pp. 29 - 33
• Main Authors: Hu, Guo-rong, Deng, Xin-rong, Peng, Zhong-dong, Cao, Yan-bin, Liu, Zhi-min, Liu, Ye-xiang
• Format: Journal Article
• Language: English
• Published: Changsha Central South University 01.02.2008
• Subjects: Engineering; Metallic Materials; spray pyrolysis; LiNi; Co; cathode; lithium-ion battery; O; preparation
• ISSN: 1005-9784; 1993-0666
• DOI: 10.1007/s11771-008-0007-x

With citric acid as a polymeric agent layered LiNi 0.8 Co 0.2 O 2 materials were synthesized by a spray pyrolysis method. The LiNi 0.8 Co 0.2 O 2 particles were characterized by means of XRD, SEM and TEM. The electrochemical performances of LiNi 0.8 Co 0.2 O 2 particles were studied in a voltage window of 3.00–4.35 V and at a current density of 30 mA/g. The results show that in the pilot-scale spray pyrolysis process, the morphology of particles is dependent upon the precursor concentration and flux of carrier gas. The initial discharge capacity of the LiNi 0.8 Co 0.2 O 2 particles at 720 °C for 12 h °C is 187.3 mA·h/g, and the capacity remains 96.8 % with excellent cycleability after 30 cycles. The LiNi 0.8 Co 0.2 O 2 samples synthesized under the optimized conditions by the spray pyrolysis method shows a good electrochemical performance.