Hydrogen peroxide assisted synthesis of LiNi sub(1/3)Co sub(1/3)Mn sub(1/3)O sub(2) as high-performance cathode for lithium-ion batteries

• Published in: Journal of power sources Vol. 280; pp. 263 - 271
• Main Authors: Lin, Chaohong, Zhang, Yongzhi, Chen, Li, Lei, Ying, Ou, Junke, Guo, Yong, Yuan, Hongyan, Xiao, Dan
• Format: Journal Article
• Language: English
• Published: 15.04.2015
• Subjects: Agglomeration; Cathodes; Coprecipitation; Discharge; Energy density; Lithium-ion batteries; Oxidants; Stability
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2015.01.084

LiN sub(1/3)Co sub(1/3)Mn sub( 1/3)O sub(2) (NCM) is a promising cathode material for lithium-ion battery. In this research, a facile co-precipitation process is employed, during which the mixed solution of NH sub(3) times H sub(2)O, H sub(2)O sub(2) (30% aqueous solution) and LiOH times H sub(2)O is added into the nitrate solution. Notably, H sub(2)O sub(2) is introduced as the oxidant and dispersant during the co-precipitation process to oxidize the metal ions and decrease the agglomeration of the precursor by giving out O sub(2), and then improves the specific capacity, stability and energy density of NCM. Additionally, O sub(3) is employed to further oxidize NCM to enhance the stability during the calcination process. The obtained NCM material with single crystal structure exhibits a high initial discharge specific capacity of 208.9 mAh g super(-1) at 0.1 C (1 C = 280 mA g super(-1)), an excellent cycle stability with high retained capacity of 176.3 mAh g super(-1) after 50 cycles, and a high initial discharge specific capacities of 150.6 mAh g super(-1) at 5 C even at a high cutoff potential (4.6 V).