Slug flow synthesis of NCMA: Effect of substitution of cobalt with aluminum on the electrochemical performance of Ni-rich cathode for lithium-ion battery
Slug flow synthesis of NCMA: Effect of substitution of cobalt with aluminum on the electrochemical performance of Ni-rich cathode for lithium-ion battery
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DOI：
10.1016/j.mtener.2024.101545
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发表时间：
2024-03
影响因子：
9.3
通讯作者：
Arjun Patel;S. Mallick;Jethrine H. Mugumya;Nicolás Lopez-Riveira;Sunuk Kim;Mo Jiang;M. Paranthaman;M. Rasche;Herman Lopez;Ram B. Gupta
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文献类型：
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作者：
Arjun Patel;S. Mallick;Jethrine H. Mugumya;Nicolás Lopez-Riveira;Sunuk Kim;Mo Jiang;M. Paranthaman;M. Rasche;Herman Lopez;Ram B. Gupta
富镍Li[Ni 1-x-yCoxMny]O2（x，y ≤ 0.1）（NCM）层状材料由于其高可逆容量和高达3.6vs Li/Li+的工作电压而被认为是下一代锂离子电池和电动汽车的有前途的正极材料。然而，诸如不可逆相变、阳离子混合、微裂纹形成、材料的热和结构稳定性等问题阻碍了其广泛采用。尽管阳离子掺杂是增强基于NCM的阴极材料的电化学性能的公知技术，但是材料的性能对掺杂量非常敏感。本文研究了三种Al掺杂四元富Ni正极材料Li[Ni 0.85Co（0.1-x）Mn0.05Alx]O2（其中，x = 0-0.04）（NCMA），研究了Al掺杂对正极材料性能的影响，同时降低了Co的含量。的生产平台具有粒度均匀、生产率高、元素分布均匀等优点。研究发现，随着Al含量的增加，材料的比容量下降，但循环稳定性和倍率性能增加。最佳Al掺杂不仅通过降低阳离子混合的程度来补偿低Co的不利影响，而且还使电极极化和颗粒的破裂最小化。
Nickle-rich Li[Ni1-x-yCoxMny]O2(x, y ≤ 0.1) (NCM) layered materials are known as promising cathode materials for next-generation lithium-ion batteries and electric vehicles owing to their high-reversible capacity and operating voltage of up to 3.6 vs Li/Li+. However, issues, such as irreversible phase transition, cation mixing, microcrack formation, thermal and structural stability of the material prevent its widespread adoption. Although, cation doping is a well-known technique to enhance the electrochemical performance of the NCM-based cathode material, the performance of the material is very sensitive to the doping amount. In this study, three Al-doped quaternary Ni-rich cathode materials Li[Ni0.85Co(0.1-x)Mn0.05Alx]O2(where, x = 0–0.04) (NCMA) are synthesized through three-phase slug-flow based continuous manufacturing process followed by high temperature calcination to study the effect of Al-doping on the performance of the cathode material while reducing Co. The slug flow-based production platform has several advantages, like particle size uniformity, high production rate, and homogeneity in elemental distribution. It is found that with an increase in Al content, the specific capacity decreases but the cyclic stability and rate capability increases. Optimum Al-doping not only compensates for the adverse effect of low Co by decreasing the extent of cation mixing, but it also minimizes the electrode polarization and cracking of the particles.