Excellent electrochemical performance of LiNi0.5Co0.2Mn0.3O2 with good crystallinity and submicron primary dispersed particles
Yanfang Xie
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorCorresponding Author
Fuzhong Wu
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Correspondence
Fuzhong Wu and Xinyi Dai, Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China. Email: [email protected] (F. W.) and [email protected] (X. D.)
Search for more papers by this authorCorresponding Author
Xinyi Dai
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Correspondence
Fuzhong Wu and Xinyi Dai, Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China. Email: [email protected] (F. W.) and [email protected] (X. D.)
Search for more papers by this authorYi Mai
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorYijing Gu
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorHuixin Jin
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorJunqi Li
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorYanfang Xie
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorCorresponding Author
Fuzhong Wu
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Correspondence
Fuzhong Wu and Xinyi Dai, Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China. Email: [email protected] (F. W.) and [email protected] (X. D.)
Search for more papers by this authorCorresponding Author
Xinyi Dai
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Correspondence
Fuzhong Wu and Xinyi Dai, Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China. Email: [email protected] (F. W.) and [email protected] (X. D.)
Search for more papers by this authorYi Mai
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorYijing Gu
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorHuixin Jin
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorJunqi Li
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, College of Materials and Metallurgy, Guizhou University, Guiyang, China
Search for more papers by this authorFunding information: Guizhou Provincial Education Department Youth Science and technology talent development project, Grant/Award Number: KY[2017]111; Guizhou Science and Technology Cooperation Project, Grant/Award Numbers: LH[2017]7246, [2017]5788, [2020]5021; National Natural Science Foundation of China, Grant/Award Numbers: 51702061, 51874108, 51704082; The Innovation Group of the Guizhou Provincial Education Department, Grant/Award Number: KY[2017]030; the Introduced Talents Project of Guizhou University, Grant/Award Number: (2016)31
Summary
Nickel-cobalt-manganese ternary cathode materials are known as one of the most promising future cathode materials for Li-ion batteries (LIBs) due to their high discharge capacity, environmental friendliness, and low cost. In this paper, submicron LiNi0.5Co0.2Mn0.3O2 (NCM523) primary particles with good crystallinity and dispersibility have been synthesized combine a coprecipitation method used ethanol as solvent with solid-phase sintering technology. A feeding strategy through separate dropping of sodium carbonate and ammonia is adopted; the structure and properties of NCM523 under different pH conditions are investigated. It is found that the NCM523 synthesized at pH = 8 (NCM523-8) exhibits a uniform particle size of about 300 nm, with good crystallinity. The NCM523-8 exhibits an excellent high-potential cycling performance, with an initial discharge capacity of 193.6 mAh g−1 at 0.2 C in the voltage of 3.0 to 4.5 V, and the capacity retention is 91% after 100 cycles. It also shows excellent rate performance with a reversible capacity of 130 mAh g−1 at 5 C. The superior high-potential electrochemical performance is attributed to the improved lithium-ion diffusion coefficient and stabilized structure by the special structural characteristics as evidenced by cyclic voltammetry, electrochemical impedance spectroscopy, and X-ray diffraction.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Open Research
DATA AVAILABILITY STATEMENT
The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.
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