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Article

Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-Ion Batteries

1
College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China
2
College of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(1), 40; https://doi.org/10.3390/ma13010040
Received: 30 November 2019 / Revised: 17 December 2019 / Accepted: 18 December 2019 / Published: 20 December 2019
(This article belongs to the Special Issue Advances in Electrochemical Energy Materials)
Li-rich layered oxide cathode materials have become one of the most promising cathode materials for high specific energy lithium-ion batteries owning to its high theoretical specific capacity, low cost, high operating voltage and environmental friendliness. Yet they suffer from severe capacity and voltage attenuation during prolong cycling, which blocks their commercial application. To clarify these causes, we synthesize Li1.5Mn0.55Ni0.4Co0.05O2.5 (Li1.2Mn0.44Ni0.32Co0.04O2) with high-nickel-content cathode material by a solid-sate complexation method, and it manifests a lot slower capacity and voltage attenuation during prolong cycling compared to Li1.5Mn0.66Ni0.17Co0.17O2.5 (Li1.2Mn0.54Ni0.13Co0.13O2) and Li1.5Mn0.65Ni0.25Co0.1O2.5 (Li1.2Mn0.52Ni0.2Co0.08O2) cathode materials. The capacity retention at 1 C after 100 cycles reaches to 87.5% and the voltage attenuation after 100 cycles is only 0.460 V. Combining X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscopy (TEM), it indicates that increasing the nickel content not only stabilizes the structure but also alleviates the attenuation of capacity and voltage. Therefore, it provides a new idea for designing of Li-rich layered oxide cathode materials that suppress voltage and capacity attenuation. View Full-Text
Keywords: Li-rich layered oxide; cathode materials; voltage attenuation; lithium-ion batteries; solid-state complexation method Li-rich layered oxide; cathode materials; voltage attenuation; lithium-ion batteries; solid-state complexation method
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MDPI and ACS Style

Liu, J.; Liu, Q.; Zhu, H.; Lin, F.; Ji, Y.; Li, B.; Duan, J.; Li, L.; Chen, Z. Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-Ion Batteries. Materials 2020, 13, 40. https://doi.org/10.3390/ma13010040

AMA Style

Liu J, Liu Q, Zhu H, Lin F, Ji Y, Li B, Duan J, Li L, Chen Z. Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-Ion Batteries. Materials. 2020; 13(1):40. https://doi.org/10.3390/ma13010040

Chicago/Turabian Style

Liu, Jun; Liu, Qiming; Zhu, Huali; Lin, Feng; Ji, Yan; Li, Bingjing; Duan, Junfei; Li, Lingjun; Chen, Zhaoyong. 2020. "Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-Ion Batteries" Materials 13, no. 1: 40. https://doi.org/10.3390/ma13010040

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