Abstract
Ni-rich cathode is one of the promising candidate for high-energy lithium-ion batteries. In this work, we prepare the different super-P carbon black amounts [0.1 (SPB 0.1 wt%), 0.3 (SPB 0.3 wt%), 0.5 (SPB 0.5 wt%) and 0.7 wt% (SPB 0.7 wt%)] of carbon coated LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes and their electrochemical performances are investigated. Carbon coating does not change the crystal structure and morphology of NCM811. Among the coated NCM811, the SPB 0.5 wt% NCM811 delivers the excellent cyclability (87.8% after 80 cycles) and rate capability (86.5% at 2 C) compared to those of pristine NCM811. It is ascribed to that the carbon coating not only increase the Li ion and electron transfer as well as protect the NCM811 cathode materials from side reaction at the electrolyte/NCM811 interface. Therefore, we can conclude that the appropriate amount of carbon coating can be regarded as an effective approach for Ni-rich NCM cathode.
Highlights
Ni-rich cathode is one of the promising candidate for high-energy lithium-ion batteries
Ni-rich NCM cathodes have been considerably researched for high-energy lithium-ion batteries (LIBs) due to higher specific capacity, relatively low cost and environmental factor compared to other cathode m aterials[1]
Carbon coated NCM811 was successfully prepared using carbon black as a carbon sources through a simple one-step process and we investigate the effect of carbon coating on the electrochemical performances
Summary
Ni-rich cathode is one of the promising candidate for high-energy lithium-ion batteries. The carbon coated NCM811 shows the superior electrochemical performances These findings indicate that carbon coating is one of the effective way for high performance and stability of Ni-rich NCM cathode.
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