烧结
材料科学
法拉第效率
电化学
结晶度
锂(药物)
阴极
微观结构
化学工程
相(物质)
冶金
复合材料
电极
化学
物理化学
医学
有机化学
工程类
内分泌学
作者
Hye-Jin Park,Seong-Ju Sim,Bong‐Soo Jin,Seung‐Hwan Lee,Hyun‐Soo Kim
标识
DOI:10.1038/s41598-022-13843-5
摘要
Abstract In this study, we present a method for synthesizing Ni-rich LiNi 0.93 Co 0.04 Al 0.03 O 2 (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 LiNi 0.93 Co 0.04 Al 0.03 O 2 since it affects the crystallinity and structural stability. Therefore, various sintering temperatures (660 °C/690 °C/720 °C/750 °C/780 °C/810 °C) are studied to get optimum electrochemical performances. The electrochemical performance of LiNi 0.93 Co 0.04 Al 0.03 O 2 sintered at 720 °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 LiNi 0.93 Co 0.04 Al 0.03 O 2 sintered at 720 °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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