Effect of particle morphology on the fast-charging properties of high-nickel cathode materials

• Published in: The Korean journal of chemical engineering Vol. 40; no. 3; pp. 532 - 538
• Main Authors: Kim, Yang Soo, Kim, Jongmin, Kim, Chang-Su, Kwon, Yong Min, Kim, Seong In, Eom, Ji-Yong
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2023; Springer Nature B.V
• Subjects: Biotechnology; Catalysis; Cathodes; Charging; Chemistry; Chemistry and Materials Science; Diffusion rate; Electrode materials; Industrial Chemistry/Chemical Engineering; Lithium; Materials Science; Microcracks; Morphology; Nickel; Particle size; Performance degradation; Single crystals; Layered-Cathode Material; Secondary Particle; Single Crystalline; High Nickel; Fast Charging
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-023-1386-2

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.