Journal
SCIENTIFIC REPORTS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-022-13843-5
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Funding
- Ministry of Trade, Industry and Energy (MOTIE), Korea [20011379, 20015809]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1F1A1055979]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20015809, 20011379] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2021R1F1A1055979] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, a method for synthesizing high-energy cathode material LiNi0.93Co0.04Al0.03O2 (NCA) by the solid-phase method is presented. The sintering temperature is found to significantly affect the electrochemical performance, with the sample sintered at 720 degrees C exhibiting the best performance in terms of discharge capacity, rate capability, and cycle stability.
In this study, we present a method for synthesizing Ni-rich LiNi0.93Co0.04Al0.03O2 (NCA) with a high-energy cathode material by the solid-phase method. The sintering temperature plays a very important role in the electrochemical performance of the LiNi0.93Co0.04Al0.03O2 since it affects the crystallinity and structural stability. Therefore, various sintering temperatures (660 degrees C/690 degrees C/720 degrees C/750 degrees C/780 degrees C/810 degrees C) are studied to get optimum electrochemical performances. The electrochemical performance of LiNi0.93Co0.04Al0.03O2 sintered at 720 degrees C shows the highest discharge capacity of 217.48 mAh g(-1) with excellent Coulombic efficiency of 87.84% at 0.1 C. Moreover, the LiNi0.93Co0.04Al0.03O2 sintered at 720 degrees C exhibits excellent rate-capability (181.1 mAh g(-1) at 2.0 C) as well as superior cycle stability (95.4% after 80 cycles at 0.5 C). This is because optimized sintering temperature leads to good structural stability with low cation disorder and residual lithium content.
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