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Effect of particle morphology on the fast-charging properties of high-nickel cathode materials
Korean Journal of Chemical Engineering ( IF 2.7 ) Pub Date : 2023-02-18 , DOI: 10.1007/s11814-023-1386-2
Yang Soo Kim, Jongmin Kim, Chang-Su Kim, Yong Min Kwon, Seong In Kim, Ji-Yong Eom

In order to investigate the effect of the particle morphology on the fast-charging characteristics of high-nickel layered-cathode materials, single-crystalline and secondary-particle type cathode with different primary/secondary particle sizes were synthesized via careful microstructure design. The effect of crystalline and particle size on the fast-charging performance was identified by comparing the charging characteristics at various current rates. Also, the effect of rapid charging on the cycle-life performance of the high-nickel cathode materials was confirmed through repeated fast-charging experiments. The size of the primary particle (crystalline size) has a greater effect on the rapid-charging performance than the entire particle size. In addition, to suppress the performance degradation of high-nickel cathode during fast charging, it is important to suppress the increase in the surface area through micro-crack suppression, and it is also necessary to precisely control the size of the primary particle for efficient lithium diffusion during fast charging.



中文翻译:

颗粒形貌对高镍正极材料快充性能的影响

为了研究颗粒形态对高镍层状正极材料快速充电特性的影响,通过精心的微观结构设计合成了具有不同一次/二次粒径的单晶和二次颗粒型正极。通过比较不同电流速率下的充电特性,确定了晶体和粒径对快速充电性能的影响。此外,通过反复的快充实验证实了快充对高镍正极材料循环寿命性能的影响。初级颗粒的尺寸(结晶尺寸)比整个颗粒尺寸对快速充电性能的影响更大。此外,为了抑制快充时高镍正极的性能下降,

更新日期:2023-02-19
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